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• Firefox 17.0.1 ignoring font-weight

  - by jphogan

  http://iamsinc.com/blog/new-producer-bonus/ For some reason Firefox 17.0.1 on my Windows 7 machine is ignoring the font-weight of the td elements. It should be normal. This works fine in Chrome, IE 7 8, & 9, but not in FF. I have also tested it on an XP machine running 17.0.1 and it works fine. The font-weight should be normal, not bold. In the second box down ($300k level), the font-weight is showing up as bold on Win 7 FF 17.0.1 which pushes the pictures outside of the box. I have even tried reducing the font-weight waaay down and it has not effect on the problematic FF browser Does anybody have a solution or even a work-around? I hate to make the pictures all smaller just to work around this. Thanks!

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• bandwidth throttling C linux

  - by bob moch

  hi im currently creating a function to create a sleep time i can pause between packets for my port scanner im creating for personal/educational use for my home network. what im currently doing is opening /proc/net/dev and reading the 9th set of digits for the eth0 interface to find out the current packets being set and then reading it again and doing some math to figure out a delay to sleep between sending a packet to a port to identify it and fingerprint it. my problem is that no matter what throttle % i use it always seems to send the same rate of packets. i think its mainly my way of mathematically creating my sleep delay. edit:: dont mind the function declaration and the struct stuff all im doing is spawning this function in a thread and passing a pointer to a struct to the function, recreating the struct locally and then freeing the passed structs memory. void *bandwidthmonitor_cmd(void *param) { char cmdline[1024], *bytedata[19]; int i = 0, ii = 0; long long prevbytes = 0, currentbytes = 0, elapsedbytes = 0, byteusage = 0, maxthrottle = 0; command_struct bandwidth = *((command_struct *)param); free(param); //printf("speed: %d\n throttle: %d\n\n", UPLOAD_SPEED, bandwidth.throttle); maxthrottle = UPLOAD_SPEED * bandwidth.throttle / 100; //printf("max throttle:%lld\n", maxthrottle); FILE *f = fopen("/proc/net/dev", "r"); if(f != NULL) { while(1) { while(fgets(cmdline, sizeof(cmdline), f) != NULL) { cmdline[strlen(cmdline)] = '\0'; if(strncmp(cmdline, " eth0", 6) == 0) { bytedata[0] = strtok(cmdline, " "); while(bytedata[i] != NULL) { i++; bytedata[i] = strtok(NULL, " "); } bytedata[i + 1] = '\0'; currentbytes = atoi(bytedata[9]); } } i = 0; rewind(f); elapsedbytes = currentbytes - prevbytes; prevbytes = currentbytes; byteusage = 8 * (elapsedbytes / 1024); //printf("usage:%lld\n",byteusage); if(ii & 0x40) { SLEEP += (maxthrottle - byteusage) * -1.1;//-2.5; if(SLEEP < 0){ SLEEP = 0; } //printf("sleep:%d\n", SLEEP); } usleep(25000); ii++; } } return NULL; } SLEEP and UPLOAD_SPEED are global variables and UPLOAD_SPEED is in kb/s and generated via a speedtest function that gets the upload speed of my computer. this function is running inside a POSIX thread updating SLEEP which my threads doing the socket work grab to sleep by after every packet. as testing instead of only doing the ports i want to check i make it do all the ports over and over again so i can run dstat on a machine to check bandwidth and no matter what bandwidth.throttle is set to it always seems to generate the same amount of bandwidth to the dstat machine. the way i calculate how much i "should" throttle by is by finding the maximum throttle speed which is defined as maxthrottle = upload_speed * throttle / 100; for example if my upload speed was 1000kb/s and my throttle was 90 (90%) my max throttle would be 900kb/s from there it would find the current bytes sent from /proc/net/dev and then find my sleep time via incrementing or decrementing it via sleep += (maxthrottle - bytesysed) * -1.1; this should in theory increase or decrease the sleep time based on how many bytes used there are. the if(ii & 0x40) statement is just for some moderation control. it makes it so it only sets sleep to a new time every 30-40 iterations. final notes: the main problem is that the sleep timer does not seem to modify the speed of packets being set. or maybe its just my implementation because on a freshly restarted machine where /proc/net/dev has low numbers of bytes sent it seems to raise the sleep timer accordingly on my 60kb/s upload machine (ex if i set the throttle to 2 it will incline the sleep timer until network bandwidth out reaches the max bandwidth threshold, but when i try running it on a server which as been online forever it doesnt seem to work as nicely if at all. if anyone can suggest a new method of monitoring the network to adjust a sleep delay then let me know or if anyone sees a flaw in my code. thank you.

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• How to transfer large file (File size > Heap Size) over the network?

  - by neo

  How to transfer large file (File size Heap/RAM Size) over the network ? Lets say I have file (size 10GB) I want to transfer it machine a (RAM 512mb) to machine b (RAM 512mb). Want achieve this using java code. First, is it possible ? Any recommendation on framework. If possible, can we speed this up using threading ? Important criteria: file's data sequence needs to be maintained during transfer. Any example will be great help.

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• Seeing what files are run at startup (linux)

  - by user924

  How do a check what startup scripts are run after I ssh into a machine?

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• How to setup a mail server on Mac OS X 10.7.4?

  - by 0x90

  I am working in PHP and I have mamp on my machine. I would like to send emails from my PHP code, like this: <?php $to = "[email protected]"; $subject = "Hi!"; $body = "Hi,\n\nHow are you?"; if (mail($to, $subject, $body)) { echo("<p>Message successfully sent!</p>"); } else { echo("<p>Message delivery failed...</p>"); } ?> How can I configure a mail server for free on my machine?

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• How to edit files on the users file system from my web server?

  - by Abs

  Hello all, I am really looking for implementation advice as I have entered a new realm that I am not familiar with. At the simplest level, I would like to find a way that I can read/write to a users machine from my web server. For this to work, I think I will have to install some sort of "plugin" on the users machine which can receive (or poll?) the server for instructions. The above is the line of thought that I currently have, maybe using JAVA to do this. This needs to work on Linux, Mac and Windows OS. I am really looking for advice on the above, is it a good idea? Is there a better way of doing this? Is there something out there already that I can build on top of? I really appreciate all input and advice as this is something I have not done before. Thanks all

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• Best neural network for certain type of pattern analysis?

  - by fred basset

  Hi All, I'm working on a system that will send telemetry data on machine operation back to a central server for analysis. One of the machine parameters we're measuring is motor current drawn vs time. After an operation is finished we plan to send back an array of currents vs time to the server. A successful operation would have a pattern like a trapezoid, problematic operations would have a pattern completely different, more like a large spike in values. Can anyone recommend a type of neural network that would be good at classifying these 1D vectors of current values into a pass/fail type output? Thanks, Fred

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• 64-bit Eclipse and JVM

  - by syker

  How do I tell if I am using 64-bit Eclipse and 64-bit JVM on my Linux machine?

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• Cannot access data from hbase with amazone ec2

  - by Najeeb Thalakkatt

  I have a single node hadoop machine in which hbase is running in the amazone ec2 instance. Due to some reason the server got restarted. So i need to start hadoop and hbase again. Then its working fine, but the old data in the hbase cannot be accessed through the web-servies. While i use the shell command its working fine, i am getting the data. So i created the scenario on my local server machine, but its working fine. The version details are as follows. hadoop-0.20.2 hbase-0.90.5 apache-tomcat-7.0.30 in Amazon ec2 medium instance And i use restful web-services with Orm-hbase to access data.

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• Make network changes permanent - C++

  - by pparescasellas

  I need to allow an external client to change the IP of the Linux machine where the program is running (C++). I already know how to list all the local interfaces and the current IPs assigned to them. I also know how to programatically change said IPs. What I need to know is how to make this change permanent so, if the machine reboots, it keeps the same network configuration. What's the best way to do this? Manually parsing /etc/network/interfaces? Calling some linux command? Edit: I'm using Debian. Thanks!

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• How to add image to SO

  - by kevinj72

  How to add image to my question from my local machine instead of a web image?

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• How much does precomputation (matching a series of strings and their permutations with a set number

  - by nipun

  Consider a typical slots machine with n reels(say reel1: a,b,c,d,w1,d,b, ..etc). On play we generate a concatenated string of n objects (like for above, chars) We have a paytable which lists winning strings with payout amounts. The problem is a wild character (list of wilds: w1,w2) which can replace {w1:a,b,c},{w2:a} ..etc. Is it really worthwhile to have all possible winning strings permutations with the wilds precomputed and used or simply at the time of occurance, generate all combinations with the pattern in hand accordingly. I did'nt really see much difference initially, but now if I need to scale the machine to handle 11+ reels with a much higher concentration of wilds than previously, I need to figure out the exact approach for this particular bit. Any ideas will be really appreciated :)

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• monitor and kill runaway processes using 100% IO?

  - by bleomycin

  Hello everyone, i have a few processes that have to be run at high priority (chrt 98) that will occasionally decide to hard-lock and peg 1 core at 100% (not a huge deal) but more importantly it will use all the IO on a system, so much that its impossible to log into the machine via ssh to kill it or perform any task on the machine that isn't loaded into ram. If i happen to have something like htop already running i am able to end the process fine. Is there any type of utility/way to monitor for this type of runaway process and kill anything that uses 100% of system IO for more than X amount of time? Thanks!

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• SQL Server 2008 R2 Enterprise won't install on Windows 2008 R2 Enterprise

  - by Carlos Paulino

  I've been trying to install SQL Server on a new Windows Server 2008. I have tried everything but I haven't been able to narrow down the problem. When the installation fails I get " Exit code (Decimal): -2068643839". The problem with this is that according to Microsoft this is a generic error code. I follow their guide to look into the detail.txt inside C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\ But I can't find something that specifies the exact error. Any suggestions ? Thanks in advanced. I uploaded to detail.txt to http://www.megaupload.com/?d=0MV46SZH because it is to big to paste here. Below is the summary.txt ---------- Overall summary: Final result: SQL Server installation failed. To continue, investigate the reason for the failure, correct the problem, uninstall SQL Server, and then rerun SQL Server Setup. Exit code (Decimal): -2068643839 Exit facility code: 1203 Exit error code: 1 Exit message: SQL Server installation failed. To continue, investigate the reason for the failure, correct the problem, uninstall SQL Server, and then rerun SQL Server Setup. Start time: 2011-02-28 11:29:56 End time: 2011-02-28 11:34:45 Requested action: Install Machine Properties: Machine name: SA-SERVER Machine processor count: 8 OS version: Windows Server 2008 R2 OS service pack: Service Pack 1 OS region: United States OS language: English (United States) OS architecture: x64 Process architecture: 64 Bit OS clustered: No Product features discovered: Product Instance Instance ID Feature Language Edition Version Clustered Package properties: Description: SQL Server Database Services 2008 R2 ProductName: SQL Server 2008 R2 Type: RTM Version: 10 SPLevel: 0 Installation location: F:\x64\setup\ Installation edition: ENTERPRISE User Input Settings: ACTION: Install ADDCURRENTUSERASSQLADMIN: True AGTSVCACCOUNT: NT AUTHORITY\SYSTEM AGTSVCPASSWORD: ***** AGTSVCSTARTUPTYPE: Manual ASBACKUPDIR: Backup ASCOLLATION: Latin1_General_CI_AS ASCONFIGDIR: Config ASDATADIR: Data ASDOMAINGROUP: <empty> ASLOGDIR: Log ASPROVIDERMSOLAP: 1 ASSVCACCOUNT: <empty> ASSVCPASSWORD: ***** ASSVCSTARTUPTYPE: Automatic ASSYSADMINACCOUNTS: <empty> ASTEMPDIR: Temp BROWSERSVCSTARTUPTYPE: Disabled CONFIGURATIONFILE: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20110228_112601\ConfigurationFile.ini CUSOURCE: ENABLERANU: False ENU: True ERRORREPORTING: False FARMACCOUNT: <empty> FARMADMINPORT: 0 FARMPASSWORD: ***** FEATURES: SQLENGINE,BIDS,CONN,IS,BC,SDK,SSMS,ADV_SSMS,SNAC_SDK,OCS FILESTREAMLEVEL: 0 FILESTREAMSHARENAME: <empty> FTSVCACCOUNT: <empty> FTSVCPASSWORD: ***** HELP: False IACCEPTSQLSERVERLICENSETERMS: False INDICATEPROGRESS: False INSTALLSHAREDDIR: C:\Program Files\Microsoft SQL Server\ INSTALLSHAREDWOWDIR: C:\Program Files (x86)\Microsoft SQL Server\ INSTALLSQLDATADIR: <empty> INSTANCEDIR: D:\SQLServer INSTANCEID: MSSQLSERVER INSTANCENAME: MSSQLSERVER ISSVCACCOUNT: NT AUTHORITY\SYSTEM ISSVCPASSWORD: ***** ISSVCSTARTUPTYPE: Automatic NPENABLED: 0 PASSPHRASE: ***** PCUSOURCE: PID: ***** QUIET: False QUIETSIMPLE: False ROLE: AllFeatures_WithDefaults RSINSTALLMODE: FilesOnlyMode RSSVCACCOUNT: NT AUTHORITY\NETWORK SERVICE RSSVCPASSWORD: ***** RSSVCSTARTUPTYPE: Automatic SAPWD: ***** SECURITYMODE: SQL SQLBACKUPDIR: <empty> SQLCOLLATION: SQL_Latin1_General_CP1_CI_AS SQLSVCACCOUNT: NT AUTHORITY\SYSTEM SQLSVCPASSWORD: ***** SQLSVCSTARTUPTYPE: Automatic SQLSYSADMINACCOUNTS: SA-SERVER\Administrator SQLTEMPDBDIR: <empty> SQLTEMPDBLOGDIR: <empty> SQLUSERDBDIR: <empty> SQLUSERDBLOGDIR: <empty> SQMREPORTING: False TCPENABLED: 1 UIMODE: Normal X86: False Configuration file: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20110228_112601\ConfigurationFile.ini Detailed results: Feature: Database Engine Services Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Feature: SQL Client Connectivity SDK Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Feature: Integration Services Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Feature: Client Tools Connectivity Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Feature: Management Tools - Complete Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Feature: Management Tools - Basic Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Feature: Client Tools SDK Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Feature: Client Tools Backwards Compatibility Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Feature: Business Intelligence Development Studio Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Feature: Microsoft Sync Framework Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Rules with failures: Global rules: Scenario specific rules: Rules report file: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20110228_112601\SystemConfigurationCheck_Report.htm

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• Sign an OpenSSL .CSR with Microsoft Certificate Authority

  - by kce

  I'm in the process of building a Debian FreeRadius server that does 802.1x authentication for domain members. I would like to sign my radius server's SSL certificate (used for EAP-TLS) and leverage the domain's existing PKI. The radius server is joined to domain via Samba and has a machine account as displayed in Active Directory Users and Computers. The domain controller I'm trying to sign my radius server's key against does not have IIS installed so I can't use the preferred Certsrv webpage to generate the certificate. The MMC tools won't work as it can't access the certificate stores on the radius server because they don't exist. This leaves the certreq.exe utility. I'm generating my .CSR with the following command: openssl req -nodes -newkey rsa:1024 -keyout server.key -out server.csr The resulting .CSR: ******@mis-ke-lnx:~/G$ openssl req -text -noout -in mis-radius-lnx.csr Certificate Request: Data: Version: 0 (0x0) Subject: C=US, ST=Alaska, L=CITY, O=ORG, OU=DEPT, CN=ME/emailAddress=MYEMAIL Subject Public Key Info: Public Key Algorithm: rsaEncryption RSA Public Key: (1024 bit) Modulus (1024 bit): 00:a8:b3:0d:4b:3f:fa:a4:5f:78:0c:24:24:23:ac: cf:c5:28:af:af:a2:9b:07:23:67:4c:77:b5:e8:8a: 08:2e:c5:a3:37:e1:05:53:41:f3:4b:e1:56:44:d2: 27:c6:90:df:ae:3b:79:e4:20:c2:e4:d1:3e:22:df: 03:60:08:b7:f0:6b:39:4d:b4:5e:15:f7:1d:90:e8: 46:10:28:38:6a:62:c2:39:80:5a:92:73:37:85:37: d3:3e:57:55:b8:93:a3:43:ac:2b:de:0f:f8:ab:44: 13:8e:48:29:d7:8d:ce:e2:1d:2a:b7:2b:9d:88:ea: 79:64:3f:9a:7b:90:13:87:63 Exponent: 65537 (0x10001) Attributes: a0:00 Signature Algorithm: sha1WithRSAEncryption 35:57:3a:ec:82:fc:0a:8b:90:9a:11:6b:56:e7:a8:e4:91:df: 73:1a:59:d6:5f:90:07:83:46:aa:55:54:1c:f9:28:3e:a6:42: 48:0d:6b:da:58:e4:f5:7f:81:ee:e2:66:71:78:85:bd:7f:6d: 02:b6:9c:32:ad:fa:1f:53:0a:b4:38:25:65:c2:e4:37:00:16: 53:d2:da:f2:ad:cb:92:2b:58:15:f4:ea:02:1c:a3:1c:1f:59: 4b:0f:6c:53:70:ef:47:60:b6:87:c7:2c:39:85:d8:54:84:a1: b4:67:f0:d3:32:f4:8e:b3:76:04:a8:65:48:58:ad:3a:d2:c9: 3d:63 I'm trying to submit my certificate using the following certreq.exe command: certreq -submit -attrib "CertificateTemplate:Machine" server.csr I receive the following error upon doing so: RequestId: 601 Certificate not issued (Denied) Denied by Policy Module The DNS name is unavailable and cannot be added to the Subject Alternate name. 0x8009480f (-2146875377) Certificate Request Processor: The DNS name is unavailable and cannot be added to the Subject Alternate name. 0x8009480f (-2146875377) Denied by Policy Module My certificate authority has the following certificate templates available. If I try to submit by certreq.exe using "CertificiateTemplate:Computer" instead of "CertificateTemplate:Machine" I get an error reporting that "the requested certificate template is not supported by this CA." My google-foo has failed me so far on trying to understand this error... I feel like this should be a relatively simple task as X.509 is X.509 and OpenSSL generates the .CSRs in the required PKCS10 format. I can't be only one out there trying to sign a OpenSSL generated key on a Linux box with a Windows Certificate Authority, so how do I do this (perferably using the off-line certreq.exe tool)?

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• PPTP connection fails with errors 800/806

  - by Mark S. Rasmussen

  I've got a client (Server 2008 R2) that won't connect to our production environment PPTP VPN server (Server 2003, running RRAS). The server is behind a firewall that has TCP1723 open as well as GRE. Other clients at our office are able to connect just fine. Our office is behind a Juniper SSG5-Serial firewall, but all outgoing traffic is allowed, and multiple other clients are able to connect to VPN servers without issues. I've also setup a completely different VPN server on another network outside of our office. The functioning clients connect just fine - the Server 2008 R2 machine doesn't. Thus it's definitely a problem with this machine in particular. I've rebooted it. I've disabled the firewall, no dice on either. I've run PPTPSRV and PPTPCLNT on the server/client and they're able to communicate perfectly - indicating there's no problem using neither TCP1723 nor GRE. The Server 2008 R2 machine is also running as a VPN server itself (incoming connection) and that's working perfectly. We have the issues no matter if there are active incoming connections or not. I'm not sure what my next debugging step would be; any suggestions? EDIT: The event log on the server has the following warning from RasMan: A connection between the VPN server and the VPN client xxx.xxx.xxx.xxx has been established, but the VPN connection cannot be completed. The most common cause for this is that a firewall or router between the VPN server and the VPN client is not configured to allow Generic Routing Encapsulation (GRE) packets (protocol 47). Verify that the firewalls and routers between your VPN server and the Internet allow GRE packets. Make sure the firewalls and routers on the user's network are also configured to allow GRE packets. If the problem persists, have the user contact the Internet service provider (ISP) to determine whether the ISP might be blocking GRE packets. Obviously this points to GRE being a potential problem. But seeing as I have other clients connectiong without problems, as well as PPTPSRV and PPTPCLNT being able to communicate, I'm suspecting this might be a red herring. EDIT: Here are the anonymized events logged by the client in chronological order: CoId={742CB15C-A7E0-47B7-8240-0EFA1139CBD9}: The user XXX\YYY has started dialing a VPN connection using a per-user connection profile named ZZZ. The connection settings are: Dial-in User = XXX\YYY VpnStrategy = PPTP DataEncryption = Require PrerequisiteEntry = AutoLogon = No UseRasCredentials = Yes Authentication Type = CHAP/MS-CHAPv2 Ipv4DefaultGateway = No Ipv4AddressAssignment = By Server Ipv4DNSServerAssignment = By Server Ipv6DefaultGateway = Yes Ipv6AddressAssignment = By Server Ipv6DNSServerAssignment = By Server IpDnsFlags = Register primary domain suffix IpNBTEnabled = Yes UseFlags = Private Connection ConnectOnWinlogon = No. CoId={742CB15C-A7E0-47B7-8240-0EFA1139CBD9}: The user XXX\YYY is trying to establish a link to the Remote Access Server for the connection named ZZZ using the following device: Server address/Phone Number = XXX.YYY.ZZZ.KKK Device = WAN Miniport (PPTP) Port = VPN3-4 MediaType = VPN. CoId={742CB15C-A7E0-47B7-8240-0EFA1139CBD9}: The user XXX\YYY has successfully established a link to the Remote Access Server using the following device: Server address/Phone Number = XXX.YYY.ZZZ.KKK Device = WAN Miniport (PPTP) Port = VPN3-4 MediaType = VPN. CoId={742CB15C-A7E0-47B7-8240-0EFA1139CBD9}: The link to the Remote Access Server has been established by user XXX\YYY. CoId={742CB15C-A7E0-47B7-8240-0EFA1139CBD9}: The user XXX\YYY dialed a connection named ZZZ which has failed. The error code returned on failure is 806. Running Wireshark on the client shows it trying and retrying to send a "71 Configuration Request" While the server shows the incoming client requests, but apparently without replying: Given that this is GRE traffic, I think rules out the GRE traffic being blocked. Question is, why doesn't the server reply? This is the Configuration Request the server receives from the non functioning client (meaning no response is sent to the client request): And this is the Configuration Request the server receives from the working client: To me they seem identical, except for differing keys and magic numbers, and the fact that one client receives a response while the other doesn't.

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• Linux not buffering block I/O when the device is not "in use" (i.e. mounted)

  - by Radek Hladík

  I am installing new server and I've found an interesting issue. The server is running Fedora 19 (3.11.7-200.fc19.x86_64 kernel) and is supposed to host a few KVM/Qemu virtual servers (mail server, file server, etc..). The HW is Intel(R) Xeon(R) CPU 5160 @ 3.00GHz with 16GB RAM. One of the most important features will be Samba server and we have decided to make it as virtual machine with almost direct access to the disks. So the real HDD is cached on SSD (via bcache) then raided with md and the final device is exported into the virtual machine via virtio. The virtual machine is again Fedora 19 with the same kernel. One important topic to find out is whether the virtualization layer will not introduce high overload into disk I/Os. So far I've been able to get up to 180MB/s in VM and up to 220MB/s on real HW (on the SSD disk). I am still not sure why the overhead is so big but it is more than the network can handle so I do not care so much. The interesting thing is that I've found that the disk reads are not buffered in the VM unless I create and mount FS on the disk or I use the disks somehow. Simply put: Lets do dd to read disk for the first time (the /dev/vdd is an old Raptor disk 70MB/s is its real speed): [root@localhost ~]# dd if=/dev/vdd of=/dev/null bs=256k count=10000 ; cat /proc/meminfo | grep Buffers 2621440000 bytes (2.6 GB) copied, 36.8038 s, 71.2 MB/s Buffers: 14444 kB Rereading the data shows that they are cached somewhere but not in buffers of the VM. Also the speed increased to "only" 500MB/s. The VM has 4GB of RAM (more that the test file) [root@localhost ~]# dd if=/dev/vdd of=/dev/null bs=256k count=10000 ; cat /proc/meminfo | grep Buffers 2621440000 bytes (2.6 GB) copied, 5.16016 s, 508 MB/s Buffers: 14444 kB [root@localhost ~]# dd if=/dev/vdd of=/dev/null bs=256k count=10000 ; cat /proc/meminfo | grep Buffers 2621440000 bytes (2.6 GB) copied, 5.05727 s, 518 MB/s Buffers: 14444 kB Now lets mount the FS on /dev/vdd and try the dd again: [root@localhost ~]# mount /dev/vdd /mnt/tmp [root@localhost ~]# dd if=/dev/vdd of=/dev/null bs=256k count=10000 ; cat /proc/meminfo | grep Buffers 2621440000 bytes (2.6 GB) copied, 4.68578 s, 559 MB/s Buffers: 2574592 kB [root@localhost ~]# dd if=/dev/vdd of=/dev/null bs=256k count=10000 ; cat /proc/meminfo | grep Buffers 2621440000 bytes (2.6 GB) copied, 1.50504 s, 1.7 GB/s Buffers: 2574592 kB While the first read was the same, all 2.6GB got buffered and the next read was at 1.7GB/s. And when I unmount the device: [root@localhost ~]# umount /mnt/tmp [root@localhost ~]# cat /proc/meminfo | grep Buffers Buffers: 14452 kB [root@localhost ~]# dd if=/dev/vdd of=/dev/null bs=256k count=10000 ; cat /proc/meminfo | grep Buffers 2621440000 bytes (2.6 GB) copied, 5.10499 s, 514 MB/s Buffers: 14468 kB The bcache was disabled while testing and the results are same on faster (newer) HDDs and on SSD (except for the initial read speed of course). To sum it up. When I read from the device via dd first time, it gets read from the disk. Next time I reread it gets cached in the host but not in the guest (thats actually the same issue, more on that later). When I mount the filesystem but try to read the device directly it gets cached in VM (via buffers). As soon as I stop "using" it, buffers are discarded and the device is not cached anymore in the VM. When I looked into buffers value on the host I realized that the situation is the same. The block I/O gets buffered only when the disk is in use, in this case it means "exported to a VM". On host, after all the measurement done: 3165552 buffers On the host, after the VM shutdown: 119176 buffers I know it is not important as the disks will be mounted all the time but I am curious and I would like to know why it is working like this.

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• Troubleshooting unwanted NTP Traffic

  - by Jaxaeon

  A domain controller running Windows Server 2012 is sending NTP and NETBIOS traffic to an address that has never been configured as a time provider. The server logs give no indication that any NTP traffic is failing. The only place I see any evidence of this traffic is in pfSense system logs: (Blocked) Jun 9 08:48:50 DOMAIN 10.0.1.100:123 192.128.127.254:123 UDP (Blocked) Jun 9 08:48:53 DOMAIN 10.0.1.100:137 192.128.127.254:137 UDP As far as I can tell the NTP service is working normally otherwise: DC2.domain.com[10.0.1.101:123]: ICMP: 0ms delay NTP: -0.0131705s offset from DC1.domain.com RefID: DC1.domain.com [10.0.1.100] Stratum: 3 DC1.domain.com *** PDC ***[10.0.1.100:123]: ICMP: 0ms delay NTP: +0.0000000s offset from DC1.domain.com RefID: clock1.albyny.inoc.net [64.246.132.14] Stratum: 2 The time provider NtpClient is currently receiving valid time data from 1.pool.ntp.org,0×1 (ntp.m|0x0|0.0.0.0:123->204.2.134.163:123). The time provider NtpClient is currently receiving valid time data from 0.pool.ntp.org,0×1 (ntp.m|0x0|0.0.0.0:123->64.246.132.14:123). The time service is now synchronizing the system time with the time source 0.pool.ntp.org,0×1 (ntp.m|0x0|0.0.0.0:123->64.246.132.14:123). I've been inside and out of the NTP configuration and cannot find any reason for this traffic. Reverse DNS points the destination address to nothing.attdns.com. pinging nothing.attdns.com from the domain controller in question leads to a response from loopback (127.0.0.2) which makes my head hurt. Any ideas? EDIT1: It should probably be noted that after a dns flush, nslookup 192.128.127.254 returns nothing.attdns.com. 192.128.127.254 is not present in domain.com DNS records. The attdns.com domain is not present in cached lookups. 127.in-addr.arpa is clean of any funkyness. EDIT2: The loopback ping response from nothing.attdns.com is possibly unrelated. Machines on other networks are also displaying this behavior. EDIT3: As mentioned in the comments, I tracked the problem network adapter back to my pfSense VM hosted in esxi 5.5 (I know shame on me for virtualizing a firewall). pfSense was configured to use DC1.domain.com as its primary time provider, but upon changing it back to pool.ntp.org the problem persists. pfSense logs give no indication of NTP misconfiguration. Everywhere I can think to look this VM is identified as 10.0.1.253, so I still have no idea why it’s sending NTP requests as 192.128… Since this firewall was a temporary solution to a problem that no longer exists so I am going to decommission it. EDIT4: The queries were coming from another machine sharing the same virtual adapter as the firewall. The machine has two local adapters: one for LAN, and the other for attached hardware that uses an Ethernet connection. That hardware sits in the the mystery subnet, and the machine is broadcasting NTP requests over both adapters.

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• Windows Server 2012 Migration (DNS/AD DS Standard Eval to Essentials OEM) P2V -> Do I need a Secondary Domain Controller during migration?

  - by Aubrey Robertson

  This is my first post on this exchange (although not my first on stack exchange), so please have patience. I am a 3rd year student intern, and I have been tasked with virtualizing the server systems at the company I work for. I have come a long way, and I am almost ready to install the VM Server in migration mode. Here is some information: Source Server: Windows Server 2012 Standard Evaluation DNS Server (local only) Advanced Directory Domain Services File and Storage stuff A few other server roles Destination Server: Windows Server 2012 Essentials OEM (Hyper-V client) Running under a temporary Hyper-V host (will migrate the Hyper-V host back to the old machine after the original server is virtualized as a client). Sitting currently at the "Select Installation Mode" screen. I have been following the guides on Microsoft tech net, and today I spent most of the day getting rid of issues in the Best Practices Analyser on the source machine. I have 3 remaining issues (which are all related): ERROR: DNS: DNS servers on Ethernet (adapter name) should include the loopback address, but not as the first entry (flavour text indicates that, during migration, the DNS server may not be found) WARNING: All domains should have at least two domain controllers for redundancy. WARNING: DNS: Ethernet should be configured to use both a preferred and an alternate DNS Server. All of these issues can be resolved by deploying a secondary domain controller, but I have never done that before (see my concerns below). The main issue here that I am concerned with for installing in migration mode is the FIRST one (the error). If I try and set-up the new server deployment, and the adapter domain controller is listed as localhost, then this may cause the installation to fail. (at least, this is what the Microsoft documentation suggests). But I do not have another IP address to enter here as I have no other local domain controllers. So I did the first obvious thing that came to my mind, and tried to use Google DNS servers as my alternates. That did not work because they couldn't recognize other computers in the "forest". Now I'm no expert when it comes to DNS, so please forgive my ignorance. This DNS server is concerned only with Active Directory stuffs for the local network. If I go ahead with migration, and it fails, then I will just have to go ahead and install a secondary DNS server I suppose. The problem I have here is that I am limited by the amount of Windows Server keys I have available (I have 2); however, I do have access to a Linux box running Debian Wheezy that I set-up two weeks ago as a Mantis server. I could install Windows Server 2012 as a secondary DNS (I think) in a VM and use that, but then it seems like I will be wasting time, and probably the Windows key too, and if there's another way to do it with Linux that would be much better. Even better still, do I even need a secondary DNS server for migration at all? The hints said that during migration the original machine "might" not be found. Thank you for your time and consideration.

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• problem in run oracle server please help

  - by rima

  I used Oracle 11g, from few days ago I face below error: SQL*Plus: Release 11.2.0.1.0 Production on Thu Apr 7 07:33:19 2011 Copyright (c) 1982, 2010, Oracle. All rights reserved. Enter user-name: pentacms Enter password: ERROR: ORA-01033: ORACLE initialization or shutdown in progress Process ID: 0 Session ID: 0 Serial number: 0 Enter user-name: I try to solve the error, but it raised an other error, I try to open log file but I receive below error(last line) "ERROR at line 1: ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr], [1], [46], [32689], [32690], [], [], [], [], [], [], [] " please advice me, It's an emergency case. FIXED_TABLE_SEQUENCE ROW_WAIT_OBJ# ROW_WAIT_FILE# ROW_WAIT_BLOCK# ROW_WAIT_ROW# -------------------- ------------- -------------- --------------- ------------- TOP_LEVEL_CALL# LOGON_TIM LAST_CALL_ET PDM FAILOVER_TYPE FAILOVER_M FAI --------------- --------- ------------ --- ------------- ---------- --- RESOURCE_CONSUMER_GROUP PDML_STA PDDL_STA PQ_STATU -------------------------------- -------- -------- -------- CURRENT_QUEUE_DURATION ---------------------- CLIENT_IDENTIFIER BLOCKING_SE ---------------------------------------------------------------- ----------- BLOCKING_INSTANCE BLOCKING_SESSION FINAL_BLOCK FINAL_BLOCKING_INSTANCE ----------------- ---------------- ----------- ----------------------- FINAL_BLOCKING_SESSION SEQ# EVENT# ---------------------- ---------- ---------- EVENT ---------------------------------------------------------------- P1TEXT P1 ---------------------------------------------------------------- ---------- P1RAW ---------------- P2TEXT P2 ---------------------------------------------------------------- ---------- P2RAW ---------------- P3TEXT P3 ---------------------------------------------------------------- ---------- P3RAW WAIT_CLASS_ID WAIT_CLASS# ---------------- ------------- ----------- WAIT_CLASS WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT STATE WAIT_TIME_MICRO TIME_REMAINING_MICRO --------------- ------------------- --------------- -------------------- TIME_SINCE_LAST_WAIT_MICRO -------------------------- SERVICE_NAME SQL_TRAC SQL_T ---------------------------------------------------------------- -------- ----- SQL_T SQL_TRACE_ SESSION_EDITION_ID CREATOR_ADDR CREATOR_SERIAL# ----- ---------- ------------------ ---------------- --------------- ECID ---------------------------------------------------------------- SYS$USERS DISABLED FALSE SADDR SID SERIAL# AUDSID PADDR USER# ---------------- ---------- ---------- ---------- ---------------- ---------- USERNAME COMMAND OWNERID TADDR ------------------------------ ---------- ---------- ---------------- LOCKWAIT STATUS SERVER SCHEMA# SCHEMANAME ---------------- -------- --------- ---------- ------------------------------ OSUSER PROCESS ------------------------------ ------------------------ MACHINE PORT ---------------------------------------------------------------- ---------- TERMINAL ---------------- PROGRAM TYPE ---------------------------------------------------------------- ---------- SQL_ADDRESS SQL_HASH_VALUE SQL_ID SQL_CHILD_NUMBER SQL_EXEC_ ---------------- -------------- ------------- ---------------- --------- SQL_EXEC_ID PREV_SQL_ADDR PREV_HASH_VALUE PREV_SQL_ID PREV_CHILD_NUMBER ----------- ---------------- --------------- ------------- ----------------- PREV_EXEC PREV_EXEC_ID PLSQL_ENTRY_OBJECT_ID PLSQL_ENTRY_SUBPROGRAM_ID --------- ------------ --------------------- ------------------------- PLSQL_OBJECT_ID PLSQL_SUBPROGRAM_ID --------------- ------------------- MODULE MODULE_HASH ------------------------------------------------ ----------- ACTION ACTION_HASH -------------------------------- ----------- CLIENT_INFO ---------------------------------------------------------------- FIXED_TABLE_SEQUENCE ROW_WAIT_OBJ# ROW_WAIT_FILE# ROW_WAIT_BLOCK# ROW_WAIT_ROW# -------------------- ------------- -------------- --------------- ------------- TOP_LEVEL_CALL# LOGON_TIM LAST_CALL_ET PDM FAILOVER_TYPE FAILOVER_M FAI --------------- --------- ------------ --- ------------- ---------- --- RESOURCE_CONSUMER_GROUP PDML_STA PDDL_STA PQ_STATU -------------------------------- -------- -------- -------- CURRENT_QUEUE_DURATION ---------------------- CLIENT_IDENTIFIER BLOCKING_SE ---------------------------------------------------------------- ----------- BLOCKING_INSTANCE BLOCKING_SESSION FINAL_BLOCK FINAL_BLOCKING_INSTANCE ----------------- ---------------- ----------- ----------------------- FINAL_BLOCKING_SESSION SEQ# EVENT# ---------------------- ---------- ---------- EVENT ---------------------------------------------------------------- P1TEXT P1 ---------------------------------------------------------------- ---------- P1RAW ---------------- P2TEXT P2 ---------------------------------------------------------------- ---------- P2RAW ---------------- P3TEXT P3 ---------------------------------------------------------------- ---------- P3RAW WAIT_CLASS_ID WAIT_CLASS# ---------------- ------------- ----------- WAIT_CLASS WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT STATE WAIT_TIME_MICRO TIME_REMAINING_MICRO --------------- ------------------- --------------- -------------------- TIME_SINCE_LAST_WAIT_MICRO -------------------------- SERVICE_NAME SQL_TRAC SQL_T ---------------------------------------------------------------- -------- ----- SQL_T SQL_TRACE_ SESSION_EDITION_ID CREATOR_ADDR CREATOR_SERIAL# ----- ---------- ------------------ ---------------- --------------- ECID ---------------------------------------------------------------- FALSE FIRST EXEC 0 000007FF5D4D8D70 2 SADDR SID SERIAL# AUDSID PADDR USER# ---------------- ---------- ---------- ---------- ---------------- ---------- USERNAME COMMAND OWNERID TADDR ------------------------------ ---------- ---------- ---------------- LOCKWAIT STATUS SERVER SCHEMA# SCHEMANAME ---------------- -------- --------- ---------- ------------------------------ OSUSER PROCESS ------------------------------ ------------------------ MACHINE PORT ---------------------------------------------------------------- ---------- TERMINAL ---------------- PROGRAM TYPE ---------------------------------------------------------------- ---------- SQL_ADDRESS SQL_HASH_VALUE SQL_ID SQL_CHILD_NUMBER SQL_EXEC_ ---------------- -------------- ------------- ---------------- --------- SQL_EXEC_ID PREV_SQL_ADDR PREV_HASH_VALUE PREV_SQL_ID PREV_CHILD_NUMBER ----------- ---------------- --------------- ------------- ----------------- PREV_EXEC PREV_EXEC_ID PLSQL_ENTRY_OBJECT_ID PLSQL_ENTRY_SUBPROGRAM_ID --------- ------------ --------------------- ------------------------- PLSQL_OBJECT_ID PLSQL_SUBPROGRAM_ID --------------- ------------------- MODULE MODULE_HASH ------------------------------------------------ ----------- ACTION ACTION_HASH -------------------------------- ----------- CLIENT_INFO ---------------------------------------------------------------- FIXED_TABLE_SEQUENCE ROW_WAIT_OBJ# ROW_WAIT_FILE# ROW_WAIT_BLOCK# ROW_WAIT_ROW# -------------------- ------------- -------------- --------------- ------------- TOP_LEVEL_CALL# LOGON_TIM LAST_CALL_ET PDM FAILOVER_TYPE FAILOVER_M FAI --------------- --------- ------------ --- ------------- ---------- --- RESOURCE_CONSUMER_GROUP PDML_STA PDDL_STA PQ_STATU -------------------------------- -------- -------- -------- CURRENT_QUEUE_DURATION ---------------------- CLIENT_IDENTIFIER BLOCKING_SE ---------------------------------------------------------------- ----------- BLOCKING_INSTANCE BLOCKING_SESSION FINAL_BLOCK FINAL_BLOCKING_INSTANCE ----------------- ---------------- ----------- ----------------------- FINAL_BLOCKING_SESSION SEQ# EVENT# ---------------------- ---------- ---------- EVENT ---------------------------------------------------------------- P1TEXT P1 ---------------------------------------------------------------- ---------- P1RAW ---------------- P2TEXT P2 ---------------------------------------------------------------- ---------- P2RAW ---------------- P3TEXT P3 ---------------------------------------------------------------- ---------- P3RAW WAIT_CLASS_ID WAIT_CLASS# ---------------- ------------- ----------- WAIT_CLASS WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT STATE WAIT_TIME_MICRO TIME_REMAINING_MICRO --------------- ------------------- --------------- -------------------- TIME_SINCE_LAST_WAIT_MICRO -------------------------- SERVICE_NAME SQL_TRAC SQL_T ---------------------------------------------------------------- -------- ----- SQL_T SQL_TRACE_ SESSION_EDITION_ID CREATOR_ADDR CREATOR_SERIAL# ----- ---------- ------------------ ---------------- --------------- ECID ---------------------------------------------------------------- SADDR SID SERIAL# AUDSID PADDR USER# ---------------- ---------- ---------- ---------- ---------------- ---------- USERNAME COMMAND OWNERID TADDR ------------------------------ ---------- ---------- ---------------- LOCKWAIT STATUS SERVER SCHEMA# SCHEMANAME ---------------- -------- --------- ---------- ------------------------------ OSUSER PROCESS ------------------------------ ------------------------ MACHINE PORT ---------------------------------------------------------------- ---------- TERMINAL ---------------- PROGRAM TYPE ---------------------------------------------------------------- ---------- SQL_ADDRESS SQL_HASH_VALUE SQL_ID SQL_CHILD_NUMBER SQL_EXEC_ ---------------- -------------- ------------- ---------------- --------- SQL_EXEC_ID PREV_SQL_ADDR PREV_HASH_VALUE PREV_SQL_ID PREV_CHILD_NUMBER ----------- ---------------- --------------- ------------- ----------------- PREV_EXEC PREV_EXEC_ID PLSQL_ENTRY_OBJECT_ID PLSQL_ENTRY_SUBPROGRAM_ID --------- ------------ --------------------- ------------------------- PLSQL_OBJECT_ID PLSQL_SUBPROGRAM_ID --------------- ------------------- MODULE MODULE_HASH ------------------------------------------------ ----------- ACTION ACTION_HASH -------------------------------- ----------- CLIENT_INFO ---------------------------------------------------------------- FIXED_TABLE_SEQUENCE ROW_WAIT_OBJ# ROW_WAIT_FILE# ROW_WAIT_BLOCK# ROW_WAIT_ROW# -------------------- ------------- -------------- --------------- ------------- TOP_LEVEL_CALL# LOGON_TIM LAST_CALL_ET PDM FAILOVER_TYPE FAILOVER_M FAI --------------- --------- ------------ --- ------------- ---------- --- RESOURCE_CONSUMER_GROUP PDML_STA PDDL_STA PQ_STATU -------------------------------- -------- -------- -------- CURRENT_QUEUE_DURATION ---------------------- CLIENT_IDENTIFIER BLOCKING_SE ---------------------------------------------------------------- ----------- BLOCKING_INSTANCE BLOCKING_SESSION FINAL_BLOCK FINAL_BLOCKING_INSTANCE ----------------- ---------------- ----------- ----------------------- FINAL_BLOCKING_SESSION SEQ# EVENT# ---------------------- ---------- ---------- EVENT ---------------------------------------------------------------- P1TEXT P1 ---------------------------------------------------------------- ---------- P1RAW ---------------- P2TEXT P2 ---------------------------------------------------------------- ---------- P2RAW ---------------- P3TEXT P3 ---------------------------------------------------------------- ---------- P3RAW WAIT_CLASS_ID WAIT_CLASS# ---------------- ------------- ----------- WAIT_CLASS WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT STATE WAIT_TIME_MICRO TIME_REMAINING_MICRO --------------- ------------------- --------------- -------------------- TIME_SINCE_LAST_WAIT_MICRO -------------------------- SERVICE_NAME SQL_TRAC SQL_T ---------------------------------------------------------------- -------- ----- SQL_T SQL_TRACE_ SESSION_EDITION_ID CREATOR_ADDR CREATOR_SERIAL# ----- ---------- ------------------ ---------------- --------------- ECID ---------------------------------------------------------------- 16 rows selected. SQL> desc dba_user; ERROR: ORA-04043: object dba_user does not exist SQL> desc dba_users; ERROR: ORA-04043: object dba_users does not exist SQL> desc v$user; ERROR: ORA-04043: object v$user does not exist SQL> desc v$users ERROR: ORA-04043: object v$users does not exist SQL> seleect * from dba_users; SP2-0734: unknown command beginning "seleect * ..." - rest of line ignored. SQL> select * from dba_users; select * from dba_users * ERROR at line 1: ORA-01219: database not open: queries allowed on fixed tables/views only SQL> alter database open; alter database open * ERROR at line 1: ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr], [1], [46], [32689], [32690], [], [], [], [], [], [], [] SQL> alter database mount; alter database mount * ERROR at line 1: ORA-01100: database already mounted SQL> alter database mount;

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• Cisco Pix how to add an additional block of static ip addresses for nat?

  - by Scott Szretter

  I have a pix 501 with 5 static ip addresses. My isp just gave me 5 more. I am trying to figure out how to add the new block and then how to nat/open at least one of them to an inside machine. So far, I named a new interface "intf2", ip range is 71.11.11.58 - 62 (gateway should 71.11.11.57) imgsvr is the machine I want to nat to one of the (71.11.11.59) new ip addresses. mail (.123) is an example of a machine that is mapped to the current existing 5 ip block (96.11.11.121 gate / 96.11.11.122-127) and working fine. Building configuration... : Saved : PIX Version 6.3(4) interface ethernet0 auto interface ethernet0 vlan1 logical interface ethernet1 auto nameif ethernet0 outside security0 nameif ethernet1 inside security100 nameif vlan1 intf2 security1 enable password xxxxxxxxx encrypted passwd xxxxxxxxx encrypted hostname xxxxxxxPIX domain-name xxxxxxxxxxx no fixup protocol dns fixup protocol ftp 21 fixup protocol h323 h225 1720 fixup protocol h323 ras 1718-1719 fixup protocol http 80 fixup protocol rsh 514 fixup protocol rtsp 554 fixup protocol sip 5060 fixup protocol sip udp 5060 fixup protocol skinny 2000 no fixup protocol smtp 25 fixup protocol sqlnet 1521 fixup protocol tftp 69 names ...snip... name 192.168.10.13 mail name 192.168.10.29 imgsvr object-group network vpn1 network-object mail 255.255.255.255 access-list outside_access_in permit tcp any host 96.11.11.124 eq www access-list outside_access_in permit tcp any host 96.11.11.124 eq https access-list outside_access_in permit tcp any host 96.11.11.124 eq 3389 access-list outside_access_in permit tcp any host 96.11.11.123 eq https access-list outside_access_in permit tcp any host 96.11.11.123 eq www access-list outside_access_in permit tcp any host 96.11.11.125 eq smtp access-list outside_access_in permit tcp any host 96.11.11.125 eq https access-list outside_access_in permit tcp any host 96.11.11.125 eq 10443 access-list outside_access_in permit tcp any host 96.11.11.126 eq smtp access-list outside_access_in permit tcp any host 96.11.11.126 eq https access-list outside_access_in permit tcp any host 96.11.11.126 eq 10443 access-list outside_access_in deny ip any any access-list inside_nat0_outbound permit ip 192.168.0.0 255.255.0.0 IPPool2 255.255.255.0 access-list inside_nat0_outbound permit ip 172.17.0.0 255.255.0.0 IPPool2 255.255.255.0 access-list inside_nat0_outbound permit ip 172.16.0.0 255.255.0.0 IPPool2 255.255.255.0 ...snip... access-list inside_access_in deny tcp any any eq smtp access-list inside_access_in permit ip any any pager lines 24 logging on logging buffered notifications mtu outside 1500 mtu inside 1500 ip address outside 96.11.11.122 255.255.255.248 ip address inside 192.168.10.15 255.255.255.0 ip address intf2 71.11.11.58 255.255.255.248 ip audit info action alarm ip audit attack action alarm pdm location exchange 255.255.255.255 inside pdm location mail 255.255.255.255 inside pdm location IPPool2 255.255.255.0 outside pdm location 96.11.11.122 255.255.255.255 inside pdm location 192.168.10.1 255.255.255.255 inside pdm location 192.168.10.6 255.255.255.255 inside pdm location mail-gate1 255.255.255.255 inside pdm location mail-gate2 255.255.255.255 inside pdm location imgsvr 255.255.255.255 inside pdm location 71.11.11.59 255.255.255.255 intf2 pdm logging informational 100 pdm history enable arp timeout 14400 global (outside) 1 interface global (outside) 2 96.11.11.123 global (intf2) 3 interface global (intf2) 4 71.11.11.59 nat (inside) 0 access-list inside_nat0_outbound nat (inside) 2 mail 255.255.255.255 0 0 nat (inside) 1 0.0.0.0 0.0.0.0 0 0 static (inside,outside) tcp 96.11.11.123 smtp mail smtp netmask 255.255.255.255 0 0 static (inside,outside) tcp 96.11.11.123 https mail https netmask 255.255.255.255 0 0 static (inside,outside) tcp 96.11.11.123 www mail www netmask 255.255.255.255 0 0 static (inside,outside) 96.11.11.124 ts netmask 255.255.255.255 0 0 static (inside,outside) 96.11.11.126 mail-gate2 netmask 255.255.255.255 0 0 static (inside,outside) 96.11.11.125 mail-gate1 netmask 255.255.255.255 0 0 access-group outside_access_in in interface outside access-group inside_access_in in interface inside route outside 0.0.0.0 0.0.0.0 96.11.11.121 1 route intf2 0.0.0.0 0.0.0.0 71.11.11.57 2 timeout xlate 0:05:00 timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00 timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00 timeout uauth 0:05:00 absolute floodguard enable ...snip... : end [OK] Thanks!

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• OpenVPN - client-to-client traffic working in one direction but not the other

  - by user42055

  I have the following VPN configuration: +------------+ +------------+ +------------+ | outpost |----------------| kino |----------------| guchuko | +------------+ +------------+ +------------+ OS: FreeBSD 6.2 OS: Gentoo 2.6.32 OS: Gentoo 2.6.33.3 Keyname: client3 Keyname: server Keyname: client1 eth0: 10.0.1.254 eth0: 203.x.x.x eth0: 192.168.0.6 tun0: 192.168.150.18 tun0: 192.168.150.1 tun0: 192.168.150.10 P-t-P: 192.166.150.17 P-t-P: 192.168.150.2 P-t-P: 192.168.150.9 Kino is the server and has client-to-client enabled. All three machines have ip forwarding enabled, by this on the gentoo boxes: net.ipv4.conf.all.forwarding = 1 And this on the FreeBSD box: net.inet.ip.forwarding: 1 In the server's "ccd" directory is the following files: client1: iroute 192.168.0.0 255.255.255.0 client3: iroute 10.0.1.0 255.255.255.0 The server config has these routes configured: push "route 192.168.0.0 255.255.255.0" push "route 10.0.1.0 255.255.255.0" route 192.168.0.0 255.255.255.0 route 10.0.1.0 255.255.255.0 Kino's routing table looks like this: 192.168.150.0 192.168.150.2 255.255.255.0 UG 0 0 0 tun0 10.0.1.0 192.168.150.2 255.255.255.0 UG 0 0 0 tun0 192.168.0.0 192.168.150.2 255.255.255.0 UG 0 0 0 tun0 192.168.150.2 0.0.0.0 255.255.255.255 UH 0 0 0 tun0 Outpost's like this: 192.168.150 192.168.150.17 UGS 0 17 tun0 192.168.0 192.168.150.17 UGS 0 2 tun0 192.168.150.17 192.168.150.18 UH 3 0 tun0 And Guchuko's like this: 192.168.150.0 192.168.150.9 255.255.255.0 UG 0 0 0 tun0 10.0.1.0 192.168.150.9 255.255.255.0 UG 0 0 0 tun0 192.168.150.9 0.0.0.0 255.255.255.255 UH 0 0 0 tun0 Now, the tests. Pings from Guchuko to Outpost's LAN IP work OK, as does the reverse - pings from Outpost to Guchuko's LAN IP. However... Pings from Outpost, to a machine on Guchuko's LAN work fine: .(( root@outpost )). (( 06:39 PM )) :: ~ :: # ping 192.168.0.3 PING 192.168.0.3 (192.168.0.3): 56 data bytes 64 bytes from 192.168.0.3: icmp_seq=0 ttl=63 time=462.641 ms 64 bytes from 192.168.0.3: icmp_seq=1 ttl=63 time=557.909 ms But a ping from Guchuko, to a machine on Outpost's LAN does not: .(( root@guchuko )). (( 06:43 PM )) :: ~ :: # ping 10.0.1.253 PING 10.0.1.253 (10.0.1.253) 56(84) bytes of data. --- 10.0.1.253 ping statistics --- 3 packets transmitted, 0 received, 100% packet loss, time 2000ms Guchuko's tcpdump of tun0 shows: 18:46:27.716931 IP 192.168.150.10 > 10.0.1.253: ICMP echo request, id 63009, seq 1, length 64 18:46:28.716715 IP 192.168.150.10 > 10.0.1.253: ICMP echo request, id 63009, seq 2, length 64 18:46:29.716714 IP 192.168.150.10 > 10.0.1.253: ICMP echo request, id 63009, seq 3, length 64 Outpost's tcpdump on tun0 shows: 18:44:00.333341 IP 192.168.150.10 > 10.0.1.253: ICMP echo request, id 63009, seq 3, length 64 18:44:01.334073 IP 192.168.150.10 > 10.0.1.253: ICMP echo request, id 63009, seq 4, length 64 18:44:02.331849 IP 192.168.150.10 > 10.0.1.253: ICMP echo request, id 63009, seq 5, length 64 So Outpost is receiving the ICMP request destined for the machine on it's subnet, but appears not be forwarding it. Outpost has gateway_enable="YES" in its rc.conf which correctly sets net.inet.ip.forwarding to 1 as mentioned earlier. As far as I know, that's all that's required to make a FreeBSD box forward packets between interfaces. Is there something else I could be forgetting ?

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• Setting up home DNS with Ubuntu Server

  - by Zeophlite

  I have a webserver (with static IP 192.168.1.5), and I want to have my machines on my local network to be able to access it without modifying /etc/hosts (or equivalent for Windows/OSX). My router has Primary DNS server 192.168.1.5 Secondary DNS server 8.8.8.8 (Google's public DNS). Nginx is set up to server websites externally as *.example.com Internally, I want *.example.local to point to the server. My webserver has BIND9 installed, but I'm unsure of the settings. I've been through various contradicting tutorials, and so most of my settings have been clobbered. I've stripped out the lines which I'm confused about. The tutorials I looked at are http://tech.surveypoint.com/blog/installing-a-local-dns-server-behind-a-hardware-router/ and http://ubuntuforums.org/showthread.php?t=236093 . They mostly differ on what should be put in /etc/bind/zones/db.example.local and /etc/bind/zones/db.192, so I've left the conflicting lines out below. Can someone suggest what the correct lines are to give my above behaviour (namely *.example.local pointing to 192.168.1.5)? /etc/network/interfaces auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.1.5 netmask 255.255.255.0 broadcast 192.168.1.255 gateway 192.168.1.254 /etc/hostname avalon /etc/resolv.conf # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN /etc/bind/named.conf.options options { directory "/var/cache/bind"; forwarders { 8.8.8.8; 8.8.4.4; }; dnssec-validation auto; auth-nxdomain no; # conform to RFC1035 listen-on-v6 { any; }; }; /etc/bind/named.conf.local zone "example.local" { type master; file "/etc/bind/zones/db.example.local"; }; zone "1.168.192.in-addr.arpa" { type master; file "/etc/bind/zones/db.192"; }; /etc/bind/zones/db.example.local $TTL 604800 @ IN SOA avalon.example.local. webadmin.example.local. ( 5 ; Serial, increment each edit 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ) ; Negative Cache TTL /etc/bind/zones/db.192 $TTL 604800 @ IN SOA avalon.example.local. webadmin.example.local. ( 4 ; Serial, increment each edit 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ) ; Negative Cache TTL ; What do I need to add to the above files so that on a laptop on the internal network, I can type in webapp.example.local, and be served by my webserver? EDIT I made several changes to the above files on the webserver. /etc/network/interfaces (end of file) dns-nameservers 127.0.0.1 dns-search example.local /etc/bind/zones/db.example.local (end of file) @ IN NS avalon.example.local. @ IN A 192.168.1.5 avalon IN A 192.168.1.5 webapp IN A 192.168.1.5 www IN CNAME 192.168.1.5 /etc/bind/zones/db.192 (end of file) IN NS avalon.example.local. 73 IN PTR avalon.example.local. As a side note, my spare Win7 machine was able to connect directly to webapp.example.local, but for a Ubuntu 13.10 machine, I had to make the following changes as well (not on the webserver, but on a separate machine): /etc/nsswitch.conf before hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4 after hosts: files dns /etc/NetworkManager/NetworkManager.conf before dns=dnsmasq after #dns=dnsmasq The issue remains that its not wildcard DNS, and so I have to add entries to /etc/bind/zones/db.example.local for webapp1, webapp2, ...

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• My 3D Games crashing in these scenarios

  - by desaivv

  I have a situation here which I am unable to solve. I bought a PC last year March, here are my specs: Intel Core i3 550 @ 3GHz 4 GB RAM @400 MHz XFX GeForce 9500 GT graphics card 1GB @550MHz 500 GB HDD Lately as soon as I load my save game of Skyrim, it crashes. I have been playing Skyrim since I joined Gaming.SE site. Crashes as in the entire scene gets red lines. I can not ALT + TAB back or even CTRL + ALT + DEL either. My only recourse is a hard reset via the power button. Can not take a screen shot either. I have the latest Forceware 296.10 drivers also. This has been happening since the last 2 weeks. I always use Driver Sweeper to clean my old drivers, since that is what XFXForce recommends before installing new drivers. I installed MSI Afterburner lately to see my GPU temperature. My GPU is default, never over-clocked it. In MSI's Afterburner, I can not adjust fan speed. It is greyed out. Also in settings there is no fan tab. With normal Internet browsing it stays at 51 C. Ran Memtest86 over night with level 11. Took about 13 hours, but no errors in my RAM. I even re-installed my OS, with just the 296 drivers. The fan for the GPU does come on. I can play Diablo 2. I can not get past Warcraft 3's menu selection. There WAS some dust in my machine, but I always try and keep everything clean, since in my home town dust is an issue. Always keep cool my entire PC cabinet. My friend came with his functioning graphics card, we bought our PCs at the same time with exact same specifications. His card did not work either. Same problem with the scene freezing with red lines. I did do my research before posting here. That is how I was able to learn about MSI Afterburner, Driver Sweeper, SpeedFan etc. I followed posts on Tom's Hardware too regarding people that had similar problems. One person suggested and was followed by worked as well the suggestion to "Bake the card in an oven". Since I bought it, played Diablo 2 for months, Starcraft 2 campaign for months and Skyrim recently for months. Bought ME3 also. I am at my wits end. I do not know what else to do. I can go out and buy a card, but my friend's card did not work either. I can use the machine for Eclipse or VS2010 development just fine. Just not with 3D gaming. I originally posted this question on Gaming.SE But I was directed here. I have browsed the SU database for my problem and found this, this, and this. But none of these cover my question. My machine is only one year old. Can some experienced superuser(s) shed some light on this scenario? Is it a 3D graphics card problem? Will a brand new card work? What else can I try to pin point the problem? Can it be the Motherboard? Thanks.

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• Can not open port 3306 on Ubuntu using iptables

  - by user94626

  I am trying to open port 3306 (for remote mysql connections) on my ubuntu 12.04 server machine but for the life of me can't get the damned thing to work! Here is what I did: 1) list current firewall rules: $> sudo iptables -nL -v output: Chain INPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 225 16984 fail2ban-ssh tcp -- * * 0.0.0.0/0 0.0.0.0/0 multiport dports 22 220 69605 ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0 0 0 REJECT all -- lo * 0.0.0.0/0 127.0.0.0/8 reject-with icmp-port-unreachable 486 54824 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED 1 60 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 19 988 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:443 1 52 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22 0 0 ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0/0 icmptype 8 4 208 LOG all -- * * 0.0.0.0/0 0.0.0.0/0 limit: avg 5/min burst 5 LOG flags 0 level 7 prefix "iptables denied: " 4 208 REJECT all -- * * 0.0.0.0/0 0.0.0.0/0 reject-with icmp-port-unreachable Chain FORWARD (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 0 0 REJECT all -- * * 0.0.0.0/0 0.0.0.0/0 reject-with icmp-port-unreachable Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 735 182K ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 Chain fail2ban-ssh (1 references) pkts bytes target prot opt in out source destination 225 16984 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0 2) try to connect from remote machine: $> mysql -u root -p -h x.x.x.x output: timeout.... failed to connect 3) try to add a new rule to iptables: iptables -A INPUT -i eth0 -p tcp -m tcp --dport 3306 -j ACCEPT 4) make sure the new rule is added: $> sudo iptables -nL -v output: Chain INPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 359 25972 fail2ban-ssh tcp -- * * 0.0.0.0/0 0.0.0.0/0 multiport dports 22 251 78665 ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0 0 0 REJECT all -- lo * 0.0.0.0/0 127.0.0.0/8 reject-with icmp-port-unreachable 628 64420 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED 1 60 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 19 988 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:443 1 52 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22 0 0 ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0/0 icmptype 8 5 260 LOG all -- * * 0.0.0.0/0 0.0.0.0/0 limit: avg 5/min burst 5 LOG flags 0 level 7 prefix "iptables denied: " 5 260 REJECT all -- * * 0.0.0.0/0 0.0.0.0/0 reject-with icmp-port-unreachable 0 0 ACCEPT tcp -- eth0 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:3306 Chain FORWARD (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 0 0 REJECT all -- * * 0.0.0.0/0 0.0.0.0/0 reject-with icmp-port-unreachable Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 919 213K ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 Chain fail2ban-ssh (1 references) pkts bytes target prot opt in out source destination 359 25972 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0 which appears to be the case (last line in "Chain INPUT" section). 5) try to connect again from remote machine: $> mysql -u root -p -h x.x.x.x output: timeout.... failed to connect which is failing again. 6) try to flush all rules: $> sudo iptables -F 7) this time I CAN CONNECT. 8) reboot server and try to connect, FAILURE. I suspect since the new rule is being appended at the end it will have no effect as there appears to be a "reject all" sort of rule before it. If this is the case, how to make sure the new rule is added in the right order? Otherwise, what am I missing? Please help.

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