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• Windows 2003 R2 zip program blocking EXE file

  - by Harvey Kwok

  I have a Windows 2003 R2 Enterprise Edition SP2 32-bit machine with all latest patch (as of 1-6-2011). It's a VM. I have a zip file, including a pdf file, a txt file and a exe file. If I copy the zip file onto the machine via a shared network drive, I can unzip all the files properly without problems. If I put the zip file on my web server and then I download it from there, I can only unzip the pdf file and txt file. The exe file is silently ignored. I searched the web and found somebody reporting similar issue on XP. If I right click on the zip file downloaded from the web server, at the bottom of the general page, it has a warning message saying that "This file came from antoher computer and might be blocked to help protect this computer" I understand that I can solve the problem by simply clicking the "Unblock" button and extract the file again. The things that bothering me is that why the warning message says "might be blocked"? I tried downloading the same zip file from the same web server on to my Windows 7 box with latest patch. It also shows the same warning message. However, even with the warning message, I can extract all the files properly without clicking the "Unblock" button. Is it a bug in Windows 2003 R2 SP1? Is there any security settings controlling this? How likely will the end user seeing this problem? I want to dig into this because I am worrying people downloading my zip file from my web server might see similar problems. The first thought coming to the user's mind will be the zip file is somehow corrupted. Honestly, I didn't know this "Unblock" feature in Windows before I run into this problem. EDIT I just tried it on another Windows 2003 R2 SP1 machine. The zip program doesn't block the EXE file on that machine either. Both Windows 2003 R2 SP1 machines are joining to the same forest.

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• FTP Server on Centos 5.8 - Transfer fails randomly

  - by Diego

  Hi have ProFTPD runningon a brand new CentOS 5.8 server with Plesk, and its behaviour is inconsistent at best. I tried to transfer a directory from my PC, and every time I get a transfer failed on a random file. It's never the same one that fails, it just fails. Sometimes it's a .gif, sometimes it's a .css, sometimes it's a JPG. Of several hundred files, a dozen is always failing for no apparent reason. The error that I get is the following: COMMAND:> [27/11/2012 11:43:52] STOR main_border.gif [27/11/2012 11:43:53] 500 Invalid command: try being more creative ERROR:> [27/11/2012 11:43:53] Syntax error: command unrecognized. The above is just an example, the "command unrecognized" occurs with LIST and other commands as well. Here's the ProFTPD configuration, just in case: ServerName "ProFTPD" #ServerType standalone ServerType inetd DefaultServer on <Global> DefaultRoot ~ psacln AllowOverwrite on </Global> DefaultTransferMode binary UseFtpUsers on TimesGMT off SetEnv TZ :/etc/localtime Port 21 Umask 022 MaxInstances 30 ScoreboardFile /var/run/proftpd/scoreboard TransferLog /usr/local/psa/var/log/xferlog #Change default group for new files and directories in vhosts dir to psacln <Directory /var/www/vhosts> GroupOwner psacln </Directory> # Enable PAM authentication AuthPAM on AuthPAMConfig proftpd IdentLookups off UseReverseDNS off AuthGroupFile /etc/group Include /etc/proftpd.include Note: file /etc/proftpd.include is blank. The above is the default configuration set by Plesk 11. I don't know much of why is that way, my knowledge of Linux System Administration is very basic and the one of ProFTPD is a complete zero. Thanks in advance for the help. Update Issue experienced with CuteFTP and FileZilla. Update Replaced ProFTPd with PureFTPd, issue persists. Sometimes I get "command unrecognized", sometimes "failed to establish data connection". I'm starting to think that it could be a network issue, but I have completely zero knowledge of networking.

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• Hosting WCF over Internet

  - by karthik

  I am pretty new to exposing the WCF services hosted on IIS over internet. I will be deploying a WCF service over IIS(6 or 7) and would like to expose this service over the internet. This will be hosted in a corporate network having firewall, I want this service to be accessible over the internet(should be able to pass through the firewall) I did some research on this and some of the pointers I got: 1. I could use wsHTTPBinding or nettcpbinding (the client is intended to be .net client). Which of the bindings is preferable. 2. To overcome the corporate I came across DMZ server, what is the purpose of this and do I really need to use this). 3. I will be passing some files between the client and server, and the client needs to know the progress of the processing on server and the end result. I know this is a very broad question to ask, but could anyone give me pointers where I could start on this and what approach to take for this problem. Any help will be appreciated. Thanks Karthik

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• Are same IP address with different submask unique?

  - by xEnOn

  In a same block of IPv4 addresses, can there be same IPs with different submasks? For example, can I have this: 180.70.65.140/26 180.70.65.140/25 180.70.65.140/24 All the 3 addresses above have the same numbers but different subnet mask. Are all the 3 addresses distinct of their own? In other words, 180.70.65.140/25 belongs to User A, 180.70.65.140/25 belongs to User B and 180.70.65.140/24 belongs to User C? After applying the submask, their network addresses look like this: 180.70.65.140/26 --> 180.70.65.128/26 180.70.65.140/25 --> 180.70.65.128/25 180.70.65.140/24 --> 180.70.65.0/24 If the addresses are recognised uniquely, how is it so? How would each of the these addresses being recognised to be unique? I am thinking like once I have 180.70.65.140/26, I can't reuse the same numbers of 180.70.65.140 again but since classless is meant to increase the number of IP addresses, it would do much if I can't reuse.

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• IPSec Tunnel to Amazon EC2 - Netkey, NAT, and routing problem

  - by Ernest Mueller

  Hey all, I'm working on getting an IPSec VPN working between Amazon EC2 and my on-premise. The goal is to be able to safely administer stuff, up/download data, etc. over that tunnel. I have gotten the tunnel up in openswan between a Fedora 12 instance with an elastic IP and a Cisco router that's also NATted. I think the ipsec part is OK, but I'm having trouble figuring out how to route traffic that way; there's no "ipsec0" virutal interface because on Amazon you have to use netkey and not KLIPS for the vpn. I hear iptables may be required and I'm an iptables noob. On the left (Amazon), I have a 10. network. Box 1 is privately 10.254.110.A, publically IP 184.73.168.B. Netkey tunnel is up. Box 2 is publically 130.164.26.C, privately 130.164.0.D And my .conf is: conn ni type= tunnel authby= secret left= 10.254.110.A leftid= 184.73.168.B leftnexthop= %defaultroute leftsubnet= 10.254.0.0/32 right= 130.164.26.C rightid= 130.164.0.D rightnexthop= %defaultroute rightsubnet= 130.164.0.0/18 keyexchange= ike pfs= no auto= start keyingtries= 3 disablearrivalcheck=no ikelifetime= 240m auth= esp compress= no keylife= 60m forceencaps= yes esp= 3des-md5 I added a route to box 1 (130.164.0.0/18 via 10.254.110.A dev eth0) but that doesn't do it for predictable reasons, when I traceroute the traffic's still going "around" and not through the vpn. Routing table: 10.254.110.0/23 dev eth0 proto kernel scope link src 10.254.110.A 130.164.0.0/18 via 10.254.110.178 dev eth0 src 10.254.110.A 169.254.0.0/16 dev eth0 scope link metric 1002 Anyone know how to do the routing with a netkey ipsec tunnel where both sides are NATted? Thanks...

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• Using 1and1.com Servers, SMTP Mail is Limited - Local XAMPP Server Works As Expected

  - by nicorellius

  I'm starting to not like 1and1.com that much. I've used them for years, but mainly for simple sites without much need for configuration. I know there are better hosting companies out and I may go seeking them. The problem here is that on my Local XAMPP server (sitting on a network with Comcast ISP), I have a PHP script that uses PEAR::Mail to send mail using MIME. The script works find locally with either smtp.1and1.com and corresponding credentials and smtp.gmail.com with corresponding credentials, using appropriate ports, etc. 1and1 tells me that I have to change the MX record on the domain where this script runs in order to make this work. This doesn't make sense to me. Now I'm pretty new to all this, but how is it that this is the case? Why can my local server work just fine, out of the box, but their servers not? I have asked them these questions, but they are very vague and I cannot get any good answers from them. Versions: PEAR Version: 1.5.0 PHP Version: 4.4.9 Zend Engine Version: 1.3.0 My apologies in advance for my ignorance. Thanks for the help in advance.

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• Xen domU passwd file overwritten with console log output

  - by malfy

  I was setting up a Debian Xen domU and after booting it fine, I added basic configuration to /etc/network/interfaces and ran /etc/init.d/networking restart. This failed so I decided to reboot. After the reboot I also ran xm shutdown box. When dropped to a shell prompt it wouldn't let me login. Upon further inspection, I now have garbage in some critical files in /etc: root@box:/# tail +1 mnt/etc/{passwd-,shadow} tail: cannot open `+1' for reading: No such file or directory ==> mnt/etc/passwd- <== 0000000000100000 (reserved) Nov 23 02:02:39 box kernel: [ 0.000000] Xen: 0000000000100000 - 0000000004000000 (usable) Nov 23 02:02:39 box kernel: [ 0.000000] DMI not present or invalid. Nov 23 02:02:39 box kernel: [ 0.000000] last_pfn = 0x4000 max_arch_pfn = 0x1000000 Nov 23 02:02:39 box kernel: [ 0.000000] initial memory mapped : 0 - 033ff000 Nov 23 02:02:39 box kernel: [ 0.000000] init_memory_mapping: 0000000000000000-0000000004000000 Nov 23 02:02:39 box kernel: [ 0.000000] NX (Execute Disable) protection: active Nov 23 02:02:39 box kernel: [ 0.000000] 0000000000 - 0004000000 page 4k Nov 23 02:02:39 box kernel: [ 0.000000] kernel direct mapping tables up to 4000000 @ 7000-2c000 Nov 23 02:02:3 ==> mnt/etc/shadow <== 32 nr_cpumask_bits:32 nr_cpu_ids:1 nr_node_ids:1 Nov 23 02:02:39 box kernel: [ 0.000000] PERCPU: Embedded 15 pages/cpu @c15b0000 s37688 r0 d23752 u65536 Nov 23 02:02:39 box kernel: [ 0.000000] pcpu-alloc: s37688 r0 d23752 u65536 alloc=16*4096 Nov 23 02:02:39 box kernel: [ 0.000000] pcpu-alloc: [0] 0 Nov 23 02:02:39 box kernel: [ 0.000000] Xen: using vcpu_info placement Nov 23 02:02:39 box kernel: [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16160 Nov 23 02:02:39 box kernel: [ 0.000000] Kernel command line: root=/dev/mapper/xen-guest_root ro quiet root=/dev/xvda1 ro Nov 23 02:02:39 box kernel: [ 0.000000] PID hash table entries: The garbage is also present in the passwd file and the group file (although I didn't paste that above since I have since ran debootstrap on the filesystem again). Does anyone have any insight into what happened and why?

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• Problem with mydomain.com no prefix

  - by user10711

  Short question is. I have a domain name mydomain.com, we have a company website hosted on an IIS server 2003 configuration. Going to the address bar and typing www.mydomain.com will show my website properly. Typing mydomain.com into the same address bar will return an under construction website that seems to be hosted on my webserver. My domain name is hosted by Network Solutions, and I think I have it configured correctly using their advanced DNS services. In their settings I have www.mydomain.com, * and @ also pointed to the ip address of my webserver. On my webserver itself using the IIS manager, under the Web Site, and Web Site Identification. I have configured both www.mydomain.com and mydomain.com configured to work on the IP address on the webserver. I am hosting 4 different websites on my IIS server, all the other sites use prefixes other than www, an example is mail.mydomain.com and a couple of others. None of them show an under construction page as their default homepage. I am really at a loss as to why it would show an under construction page, especially since it seems to be pointing to the correct server. The reason this is such a big deal is because when you search for my company on google, the link there is for mydomain.com and by clicking on the link it shows under construction which is really quite embarrassing. Thanks in advance for any help and if there are further questions let me know.

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• CPU-adaptive compression

  - by liori

  Hello, Let assume I need to send some data from one computer to another, over a pretty fast network... for example standard 100Mbit connection (~10MB/s). My disk drives are standard HDD, so their speed is somewhere between 30MB/s and 100MB/s. So I guess that compressing the data on the fly could help. But... I don't want to be limited by CPU. If I choose an algorithm that is intensive on CPU, the transfer will actually go slower than without compression. This is difficult with compressors like GZIP and BZIP2 because you usually set the compression strength once for the whole transfer, and my data streams are sometimes easy, sometimes hard to compress--this makes the process suboptimal because sometimes I do not use full CPU, and sometimes the bandwidth is underutilized. Is there a compression program that would adapt to current CPU/bandwidth and hit the sweet spot so that the transfer will be optimal? Ideally for Linux, but I am still curious about all solutions. I'd love to see something compatible with GZIP/BZIP2 decompressors, but this is not necessary. So I'd like to optimize total transfer time, not simply amount of bytes to send. Also I don't need real time decompression... real time compression is enough. The destination host can process the data later in its spare time. I know this doesn't change much (compression is usually much more CPU-intensive than decompression), but if there's a solution that could use this fact, all the better. Each time I am transferring different data, and I really want to make these one-time transfers as quick as possible. So I won't benefit from getting multiple transfers faster due to stronger compression. Thanks,

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• What is the quickest reliable way to backup a NAS drive to a USB drive?

  - by Tim Murphy

  How would you backup 600+ GB of data on a NAS (Network-Attached Storage) drive to a USB external drive? The NAS drive does not contain mission critical data nonetheless I wish to make weekly copies of it just in case. The NAS drive is almost exclusively used as an archive dump and is rarely updated. However the backup strategy used must have a simple restore procedure so I can confidently say the data now on the NAS drive is exactly how it was at the time of backup. I did try xcopy but seemed like it would take many-many hours and eventually crashed with insufficient memory. http://www.ctunion.com/node/114 suggests I would need to use xxcopy instead due to folder/file name lengths. My concern with xcopy/xxcopy is the length of time it takes. Hoping something else is faster. NAS drive is DLink DNS-313. 1TB drive installed. Connected to router via Ethernet cable. USB drive is Seagate 1TB. Can be connected to Windows Vista (preferred) or Windows 7 PCs. Both PCs are usually connected Wirelessly however ethernet cable can be used during backup to speed up the process.

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• Reverse and Forward DNS set up correctly but sometimes MapReduce job fails

  - by phodamentals

  Ever since we switched over our cluster to communicate via private interfaces and created a DNS server with correct forward and reverse lookup zones, we get this message before the M/R job runs: ERROR org.apache.hadoop.hbase.mapreduce.TableInputFormatBase - Cannot resolve the host name for /192.168.3.9 because of javax.naming.NameNotFoundException: DNS name not found [response code 3]; remaining name '9.3.168.192.in-addr.arpa' A dig and nslookup both show that the reverse and forward look-ups both get good responses with no errors from within the cluster. Shortly after these messages, the job runs...but every once in awhile we get a NPE: Exception in thread "main" java.lang.NullPointerException INFO app.insights.search.SearchIndexUpdater - at org.apache.hadoop.net.DNS.reverseDns(DNS.java:93) INFO app.insights.search.SearchIndexUpdater - at org.apache.hadoop.hbase.mapreduce.TableInputFormatBase.reverseDNS(TableInputFormatBase.java:219) INFO app.insights.search.SearchIndexUpdater - at org.apache.hadoop.hbase.mapreduce.TableInputFormatBase.getSplits(TableInputFormatBase.java:184) INFO app.insights.search.SearchIndexUpdater - at org.apache.hadoop.mapred.JobClient.writeNewSplits(JobClient.java:1063) INFO app.insights.search.SearchIndexUpdater - at org.apache.hadoop.mapred.JobClient.writeSplits(JobClient.java:1080) INFO app.insights.search.SearchIndexUpdater - at org.apache.hadoop.mapred.JobClient.access$600(JobClient.java:174) INFO app.insights.search.SearchIndexUpdater - at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:992) INFO app.insights.search.SearchIndexUpdater - at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:945) INFO app.insights.search.SearchIndexUpdater - at java.security.AccessController.doPrivileged(Native Method) INFO app.insights.search.SearchIndexUpdater - at javax.security.auth.Subject.doAs(Subject.java:415) INFO app.insights.search.SearchIndexUpdater - at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1408) INFO app.insights.search.SearchIndexUpdater - at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:945) INFO app.insights.search.SearchIndexUpdater - at org.apache.hadoop.mapreduce.Job.submit(Job.java:566) INFO app.insights.search.SearchIndexUpdater - at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:596) INFO app.insights.search.SearchIndexUpdater - at app.insights.search.correlator.comments.CommentCorrelator.main(CommentCorrelator.java:72 Does anyone else who has set-up a CDH Hadoop cluster on a private network w/DNS server get this? CDH 4.3.1 with MR1 2.0.0 and HBase 0.94.6

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• Measure Total Bandwidth for Billing

  - by TonyZ

  I am setting up a new network which customers will host their applications on. It needs to be able to scale out to a few hundred servers and each server will have several VMs on it. Right now in my test environment, after the telco router, we are using a Linux router/firewall which is then connected to a Layer 2 switch. Could be a layer 3 in the future. I need to track total bandwidth per VM for each machine, and I need to do it in a way that it is not part of the VM. Each VM will have a private class ip address which is Natted by the gateway, or we may eventually run more than firewall/reverse proxy off a layer 3 switch. So my thinking is that I can do it off of a promiscuous port on the switches, or at the gateway firewall. I would like to have an out of the box solution, preferably open source. Does anyone have suggestions on the easiest way to set this up, and the easiest tool to use. I have looked at the web sites for Nagios, Zenoss, Zabbix, ntops on the firewall, etc. It is hard to ascertain just from the web sites if they do exactly this or not. Obviously, performance is also somewhat key here. Anything running on the gateway should not drag it down doing traffic accounting. Thanks for any thoughts. Tony Zakula

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• How can I write automated tests for iptables?

  - by Phil Frost

  I am configuring a Linux router with iptables. I want to write acceptance tests for the configuration that assert things like: traffic from some guy on the internet is not forwarded, and TCP to port 80 on the webserver in the DMZ from hosts on the corporate LAN is forwarded. An ancient FAQ alludes to a iptables -C option which allows one to ask something like, "given a packet from X, to Y, on port Z, would it be accepted or dropped?" Although the FAQ suggests it works like this, for iptables (but maybe not ipchains as it uses in the examples) the -C option seems to not simulate a test packet running through all the rules, but rather checks for the existence for an exactly matching rule. This has little value as a test. I want to assert that the rules have the desired effect, not just that they exist. I've considered creating yet more test VMs and a virtual network, then probing with tools like nmap for effects. However, I'm avoiding this solution due to the complexity of creating all those additional virtual machines, which is really quite a heavy way to generate some test traffic. It would also be nice to have an automated testing methodology which can also work on a real server in production. How else might I solve this problem? Is there some mechanism I might use to generate or simulate arbitrary traffic, then know if it was (or would be) dropped or accepted by iptables?

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• Setup Version Control on Dreamweaver

  - by John Isaacks

  I have a win computer on the Network called WIN2K8FS1 I have TortoiseSVN on a win computer and when I go to checkout a repository with Tortoise it asks me for the URL of the repository. I put in: file://WIN2K8FS1/Media/SVN_repo And it creates the working copy. I am trying to setup Dreamweaver CS5 to work with subversion. I create a new site and I go to the Version Control tab and it asks for a lot if info. First is Access. I choose Subversion since that is the only option Second is Protocol. Not sure which I need so I go with HTTP? Third is Server Address. I am assuming this is the name of the computer with the repository so I put in \\WIN2K8FS1\ Fourth is Repository Path. I put in /Media/SVN_repo Fifth is Port which I leave default to 80 Then it asks for user name and password. I never set one up for anything so I put in my domain username and password. I click test and it tells me: Server and project are not accessible! I am not sure what I am doing wrong. I am not the server admin but I did create the repository and have access to it via Tortoise. So I am not sure what I am doing wrong in Dreamweaver.

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• Using modem for sending voice recording

  - by ircmaxell

  I've got an interesting one for you. I've been going over my server monitoring and notification systems (Nagios based), and realized that if our internet connection goes down, there's no way for it to notify me. I already have a modem listening (Via CentOS 5) on a spare POTS line so that I can dial-in in case our internet goes down. I was wondering if I could come up with a script (Shell, Python, etc) that can dial out and play a recorded message (wave file I'm guessing) when it's picked up. I know Windows supports voice calls over a voice modem, I was wondering if a solution existed for Linux... I know asterisk can probably do it, but isn't that overkill (A full blown VOIP system just for a notification mechanism that will hopefully never be used)? And wouldn't it interfere with the modem's primary function as a backup network interface (PPP spawned via mgetty)? I've done some searching, and haven't really come up with much. I know how to dial out from the command line, but only as a modem (not as voice). Worst case, I could set it up to dial out as a modem, and then just realize that if I get a call with modem sounds from that number that it's the notification... Any insight would be appreciated...

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• Linksys wireless router will not hardware reset.

  - by Jack M.

  Hello, all. I'm unable to make my router perform a hardware reset, and I cannot understand why. All was working well, except that my iPhone could not connect to the wireless. I found that the router was only allowing AES encryption on WPA2 Personal mode, so I upgraded the firmware. I updated the firmware to Ver.1.06.1, and everything went screwy. The router is no longer showing up in the WiFi list (as Linksys, or its previous network name). Wiring into the router gives me an IP address from my ISP (24.121.121.XXX). Attempting to do a hardware reset, but the power light never starts flashing and the router does not seem to reboot. My machine wired in is still online with no interruption in WoW. Pulling the power cord to force a reset returns it to the same state. I even went so far as to pull up my previous IP address (from DynDNS) and try to connect to that, but it wont even ping. What I'm trying to find out is: Did the new firmware fry the thing, or is there some way to fix this? Thanks in advance for any help.

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• Workstations cannot see new MS Server 2008 domain, but can access DHCP. (solved)

  - by Radix

  The XP Pro workstations do not see the new replacement domain upon boot; they only see their cached entry for the old (server 2003) domain controller. The old_server is not connected to the network. I have DHCP working with the same scope as the old_server. In my "before-asking" search for a solution I came across the following two articles, and I recall doing things as suggested by the articles. http://www.windowsreference.com/windows-server-2008/how-to-setup-dhcp-server-in-windows-server-2008-step-by-step-guide/ http://www.windowsreference.com/windows-server-2008/step-by-step-guide-for-windows-server-2008-domain-controller-and-dns-server-setup/ The only possible issue is: I was under the impression that the domain netbios needed to match the DC's netbios. The DC netbios is city01 while the domain's FQDN is city.domain.org (I think this is mistaken and should have been just domain.org) But, the second link led me to a post which I believe answers my question. I did as they instructed by opening Local Area Connection Properties, then selecting TCP/IPv4 and setting the sole preferred DNS server to the local hosts static IP (10.10.1.1). Search for "Your problems should clear up" for the post I'm referencing: http://forums.techarena.in/active-directory/1032797.htm Have I misunderstood their instructions? I am hoping to reach the point where I can define users and user groups. Also, does TechNet have a single theoretical overview document I could read. I really don't like treating comps as magic. I will be watching this closely and will quickly answer any questions. If I've left anything out it is because I did not know it was needed. PS: I am loath to ask obviously basic questions, but I am tired and wish to fix this before tomorrow. Also, this is my first server installation, thank you for your help.

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• Error creating ODBC connection to SQL Server 2008 Express

  - by DavidB

  When creating a System DSN, I get the error: Connection failed: SQLState: '08001' SQL Server Error: 2 [Microsoft][SQL Server Native Client 10.0]Named Pipes Provider: Could not open a connection to SQL Server [2]. Connection failed: SQLState: 'HYT00' SQL Server Error: 0 [Microsoft][SQL Server Native Client 10.0]Login timeout expired I'm running Vista Home Premium 64-bit SP2, and installed SQL Server 2008 Express Advanced without errors. I'll be using the database locally for an app installed on the same PC. I'm able to successfully connect with SQL Server Management Studio using Windows Authentication (my Windows account is a member of local Administrators), and I can successfully create a database with default ownership (defaults to my Windows account). SQL Server Configuration Manager shows that Shared Memory, TCP/IP, and Named Pipes are enabled for SQL Native Client 10.0 Configuration, SQL Native Client 10.0 Configuration (32bit), and SQL Server Network Configuration (SQLEXPRESS). The SQL Server (SQLEXPRESS) and SQL Server Reporting Services (SQLEXPRESS) services are running. When I create a system DSN, my driver choices are SQL server (sqlsrv32.dll 4-10-09), which gives a generic wizard, and SQL Server Native Client 10.0 (sqlncli10.dll 7-10-08), which gives the SQL Server 2008 wizard. I choose the latter. I enter name, description, and have tried both MyPCName and 127.0.0.1 for the server name (browsing turns up nothing). After clicking Next, I leave it at Integrated Windows authentication, and leave Connect to server for additional options checked. After clicking Next, I get the error above. I know it's probably a simple answer, (permission issue?) and I'm a SQL noob, so I appreciate anything that would point me in the right direction. Thanks!

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• Redirect local, not internal, requests using SuSEfirewall2 or an iptables rule

  - by James

  I have a server that is running a web application deployed on Tomcat and is sitting in a test network. We're running SuSE 11 sp1 and have some redirection rules for incoming requests. For example we don't bind port 80 in Tomcat's server.xml file, instead we listen on port 9600 and have a configuration line in SuSEfirewall2 to redirect port 80 to 9640. This is because Tomcat doesn't run as root and can't open up port 80. My web application needs to be able to make requests to port 80 since that is the port it will be using when deployed. What rule can I add so that local requests get redirected by iptables? I tried looking at this question: How do I redirect one port to another on a local computer using iptables? but suggestions there didn't seem to help me. I tried running tcpdump on eth0 and then connecting to my local IP address (not 127.0.0.1, but the actual address) but I didn't see any activity. I did see activity if I connected from an external machine. Then I ran tcmpdump on lo, again tried to connect and this time I saw activity. So this leads me to believe that any requests made to my own IP address locally aren't getting handled by iptables. Just for reference he's what my NAT table looks like now: Chain PREROUTING (policy ACCEPT) target prot opt source destination REDIRECT tcp -- anywhere anywhere tcp dpt:http redir ports 9640 REDIRECT tcp -- anywhere anywhere tcp dpt:xfer redir ports 9640 REDIRECT tcp -- anywhere anywhere tcp dpt:https redir ports 8443 Chain POSTROUTING (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination

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• Debian - Secure system from current administrator

  - by netadmin

  Hello, I am the Network and Systems Administrator in an organization of just under 500 users. We have a number of Windows Servers, and that is certainly my area of expertise. We also have a very small handful of Debian servers. We are about to terminate the sysadmin of these Debian systems. Short of powering down the systems, I would like to know how I can ensure that the previous admin does not have control of these systems in the future, at least until we hire a replacement linux sysadmin. I have physical/virtual-console access to each of the systems, so I can reboot them in various user-modes. I just don't know what to do. Please assume that I do not currently have root access to all of these systems (an oversight on my part that I now recognize.) I have some experience in Linux, and use it on my desktop on a daily basis, but I must admit that I am a competent user of linux, not a systems admin. I have no fear of the command line however.... Is there a list of steps that one should take to "secure" a system from somebody else? Again, I assure you that this is legit, I am re-taking control of my employer's systems, at the request of my employer. I hope to not have to shut the systems down permanently and still be reasonably certain that they are secure. Thanks for your time.

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• CentOS tftp server is broken

  - by Mike Pennington

  I'm trying to run tftpd from xinetd on CentOS 6; however, I can only tftp from localhost. I have a file in /opt/tftpboot/fw.test.conf that I can retrieve if I tftp to localhost: [mpenning@localhost ~]$ tftp localhost tftp> get fw.test.conf tftp> quit [mpenning@localhost ~]$ ls fw.test.conf [mpenning@localhost ~]$ However, I cannot receive this file if I tftp to eth1 on this server (the address on eth1 is 172.16.1.4). [mpenning@localhost ~]$ sudo tshark -i eth1 udp and host 172.16.1.5 Running as user "root" and group "root". This could be dangerous. Capturing on eth1 0.000000 172.16.1.5 -> 172.16.1.4 TFTP Read Request, File: fw.test.conf\000, Transfer type: netascii\000 5.000133 172.16.1.5 -> 172.16.1.4 TFTP Read Request, File: fw.test.conf\000, Transfer type: netascii\000 10.000184 172.16.1.5 -> 172.16.1.4 TFTP Read Request, File: fw.test.conf\000, Transfer type: netascii\000 15.000297 172.16.1.5 -> 172.16.1.4 TFTP Read Request, File: fw.test.conf\000, Transfer type: netascii\000 20.000331 172.16.1.5 -> 172.16.1.4 TFTP Read Request, File: fw.test.conf\000, Transfer type: netascii\000 ^C5 packets captured [mpenning@localhost ~]$ I have the following xinetd configuration: [root@localhost mpenning]# cat /etc/xinetd.d/tftp # default: off # description: The tftp server serves files using the trivial file transfer \ # protocol. The tftp protocol is often used to boot diskless \ # workstations, download configuration files to network-aware printers, \ # and to start the installation process for some operating systems. service tftp { socket_type = dgram protocol = udp wait = yes user = root server = /usr/sbin/in.tftpd server_args = -s /opt/tftpboot disable = no per_source = 11 cps = 100 2 flags = IPv4 } [root@localhost mpenning]#

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• SQL 2008 Backups to UNC Share Failing 0xC002F210

  - by Matty Brown

  This problem is driving me NUTS!! We take backups of all of our production databases to a network share, which are then backed up to tape nightly. 8pm Mon-Fri - Full backup, followed by log backup 7am-7pm Mon-Fri, at half-hour interval - Log backup Our backups have been working in this manner since we migrated from SQL Server Standard 2000 to 2008, 3 years ago. Recently, the first log backup on Mondays have been failing. Not every time, but almost every time! The rest of the week, we've had no problems. I guess the issue may have something to do with the size of the log backup that's attempted after a weekend of no backups. Now onto the issue I need a fix for... All this week, every full backup on our biggest two databases have failed (Both backups < 1GB compressed). There's plenty of disk space on the source and destination servers. I'm guessing the issue is to do with the amount of time it takes to complete the backups of these databases, and/or the size of the backup files required to complete these backups. Changing the backup destination to local storage works fine (and very, very fast in comparison). From the Job History, I can find a few hints as to what the problem could be... Code: 0xC002F210 (Always this code, but a mix of the following descriptions...) "The operating system returned the error '64(failed to retrieve text for this error. Reason: 1815)' while attempting 'SetEndOfFile' on '\drserver\SQLBackups\Database.bak'. BACKUP DATABASE is terminating abnormally. "The operating system returned the error '64(failed to retrieve text for this error. Reason: 1815)' while attempting 'FlushFileBuffers' on '\drserver\SQLBackups\Database.bak'. BACKUP DATABASE is terminating abnormally. Please help save my hair and sanity!!

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• Trouble with HP printer

  - by reyjavikvi

  I have a HP Photosmart C3180 (it's a printer/scanner). For some reason, it recently stopped working. The power light is blinking (I think all the other lights are one, but don't remember, I'm not there right now), and the only way to turn it off is to unplug it. It won't print anything, and when you put a page in the tray it sucks it in without printing anything on it and stops when the paper is on its way out (Again, I don't remember how we managed to get it out, sorry). This printer is hooked up to a computer running XP, but it doesn't work either when printing from the network. Weirdly, the scanner works fine. Do you have any ideas on what could be the problem? Could it be a driver problem? By the way, sorry if the question lacks a bit of detail. I don't know much about printers, and I don't have it here so I can't remember exactly all the details. If needed I can update the question tonight or tomorrow.

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• ESX hosts lose connectivity with iSCSI SAN LUNs

  - by Themist

  I've been experiencing this issue for a couple of months now where my ESX hosts lose connectivity with my iSCSI SAN vmfs volumes. As a results the ESX hosts enter a nonresponsive mode the associated VMs disconnect and the only remedy is to reboot the host. This issue happens randomly . I have escalated this issue with VMWare but I haven't had any solution to the issue yet. I see no errors on my switches and there are no hardware issues as well. My SAN infrastucture is solid and there are 2 paths for every vmfs volume. Did anybody else experienced a similar issue? edit: Here are some more details: The iSCSI SAN software is Datacore Sanmelody 2.0.4.2 running on 2 HP Proliant G5 servers. The storage attached to each of the servers is an HP MSA70 and all the iSCSI SAN Volumes that are presented to my 4 ESX hosts are mirrored. I have two iSCSI swithces HP Procurve 1800G-24 that are trunked together. My SANLELODY servers are using NC360T NICs. I team two NICs and have one cable connecting to each iSCSi switch. Each ESX server uses two NICs as well for the iSCSI Network.

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• Can I autoregister my clients/servers in local DNS?

  - by Christian Wattengård

  Right now I have a W2k12 server at home that I run as a domain controller. This has the extra benefit of registering every "subordinate" computers name in it's DNS so that I don't have to go around remembering IP's all the time. (And it let's me easily run dhcp also on my servers). I need to rework my home network for several odd reasons, and in this new scenario there is no place for a big honking W2k12 server box. I have a RasPI, and I have other smallish linux boxen I can use. (In a worst case scenario I'll use my NUC, but then I'll be forced to use my home cinema's UPnP-client for media... The HORROR!!) Is it possible to set up a DNS-server-"appliance" that somehow autoregisters it's own hostname.. Scenario: Router (N66u) on 172.20.20.1. Runs DHCP on 172.20.20.100-200 range. Server [verdant] of a *nix flavor on 172.20.20.2 Laptop [speedy] of W8 flavor on DHCP assigned Laptop [canary] of W8 flavor on DHCP assigned Desktop [lianyu] of Ubunto flavor on DHCP assigned What I would like is that all of the above servers (except possibly the router) would be available on verdant.starling.lan and canary.starling.lan and so on. This is how it works right now (except the Ubuntu box... I haven't cracked that one yet) because Windows just does this for you.. I would also be able to do this without any manual labor on the server. When I tell my box it's name is smoak it should "immediately" be available as smoak.starling.lan without any extra configuration on my part. How can I do this in a Linux (Ubuntu) environment? (Bonus comment upvote for naming the naming scheme :P )

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