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  • Error applying iptables rules using iptables-restore

    - by John Franic
    Hi I'm using Ubuntu 9.04 on a VPS. I'm getting an error if I apply a iptables rule. Here is what I have done. 1.Saved the existing rules iptables-save /etc/iptables.up.rules Created iptables.test.rules and add some rules to it nano /etc/iptables.test.rulesnano /etc/iptables.test.rules This is the rules I added *filter # Allows all loopback (lo0) traffic and drop all traffic to 127/8 that doesn't use lo0 -A INPUT -i lo -j ACCEPT -A INPUT -i ! lo -d 127.0.0.0/8 -j REJECT # Accepts all established inbound connections -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT # Allows all outbound traffic # You can modify this to only allow certain traffic -A OUTPUT -j ACCEPT # Allows HTTP and HTTPS connections from anywhere (the normal ports for websites) -A INPUT -p tcp --dport 80 -j ACCEPT -A INPUT -p tcp --dport 443 -j ACCEPT # Allows SSH connections # # THE -dport NUMBER IS THE SAME ONE YOU SET UP IN THE SSHD_CONFIG FILE # -A INPUT -p tcp -m state --state NEW --dport 22- j ACCEPT # Allow ping -A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT # log iptables denied calls -A INPUT -m limit --limit 5/min -j LOG --log-prefix "iptables denied: " --log-level 7 # Reject all other inbound - default deny unless explicitly allowed policy -A INPUT -j REJECT -A FORWARD -j REJECT COMMIT After editing when I try to apply the rules by iptables-restore < /etc/iptables.test.rules I get the following error iptables-restore: line 42 failed Line 42 is COMMIT and I comment that out I get iptables-restore: COMMIT expected at line 43 I'm not sure what is the problem, it is expecting COMMIT but if COMMIT is there it's giving error. Could it be due to the fact i'm usin a VPS?My provider using OpenVZ for virtualizaton.

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  • SSH dynamic port forwarding, "Connection refused"

    - by crodjer
    I am trying to do dynamic portforwarding using openssh through a remote computer following this command: ssh -D 6789 rohan@<remote_ip> -p <remote_port> This should set up a socks server on my comp as I assume. I am able to use this for normal browsing but can't connect to IRC or remote ssh (through proxychains). I get this error: channel 3: open failed: connect failed: Connection refused A high verbosity level output of the error: $ debug1: Connection to port 6789 forwarding to socks port 0 requested. debug2: fd 9 setting TCP_NODELAY debug2: fd 9 setting O_NONBLOCK debug3: fd 9 is O_NONBLOCK debug1: channel 3: new [dynamic-tcpip] debug2: channel 3: pre_dynamic: have 0 debug2: channel 3: pre_dynamic: have 4 debug2: channel 3: decode socks5 debug2: channel 3: socks5 auth done debug2: channel 3: pre_dynamic: need more debug2: channel 3: pre_dynamic: have 0 debug2: channel 3: pre_dynamic: have 10 debug2: channel 3: decode socks5 debug2: channel 3: socks5 post auth debug2: channel 3: dynamic request: socks5 host 4.2.2.2 port 53 command 1 debug3: Wrote 96 bytes for a total of 3335 channel 3: open failed: connect failed: Connection refused debug2: channel 3: zombie debug2: channel 3: garbage collecting debug1: channel 3: free: direct-tcpip: listening port 6789 for 4.2.2.2 port 53, connect from 127.0.0.1 port 33694, nchannels 4 debug3: channel 3: status: The following connections are open: #2 client-session (t4 r0 i0/0 o0/0 fd 6/7 cfd -1) debug3: channel 3: close_fds r 9 w 9 e -1 c -1 I googled for this too, but couldn't find any solutions.

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  • What used the linux memory? Low cache, low buffer, not a VM

    - by Jason
    First of all, yes, I have read LinuxAteMyRAM, which doesn't explain my situation. # free -tm total used free shared buffers cached Mem: 48149 43948 4200 0 4 75 -/+ buffers/cache: 43868 4280 Swap: 38287 0 38287 Total: 86436 43948 42488 # As shown above, the -/+ buffers/cache: line shows indicates the used memory rate is very high. However, from output of top, I don't see any process used more than 100MB of memory. So, what used the memory? PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 28078 root 18 0 327m 92m 10m S 0 0.2 0:25.06 java 31416 root 16 0 250m 28m 20m S 0 0.1 25:54.59 ResourceMonitor 21598 root -98 0 26552 25m 8316 S 0 0.1 80:49.54 had 24580 root 16 0 24152 10m 760 S 0 0.0 1:25.87 rsyncd 4956 root 16 0 62588 10m 3132 S 0 0.0 12:36.54 vxconfigd 26703 root 16 0 139m 7120 2900 S 1 0.0 4359:39 hrmonitor 21873 root 15 0 18764 4684 2152 S 0 0.0 30:07.56 MountAgent 21883 root 15 0 13736 4280 2172 S 0 0.0 25:25.09 SybaseAgent 21878 root 15 0 18548 4172 2000 S 0 0.0 52:33.46 NICAgent 21887 root 15 0 12660 4056 2168 S 0 0.0 25:07.80 SybaseBkAgent 17798 root 25 0 10652 4048 1160 S 0 0.0 0:00.04 vxconfigbackupd This is an x86_64 machine (not a common-brand server) running x84_64 Linux, not a container in a virtual machine. Kernel (uname -a): Linux 2.6.16.60-0.99.1-smp #1 SMP Fri Oct 12 14:24:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux Content of /proc/meminfo: MemTotal: 49304856 kB MemFree: 4066708 kB Buffers: 35688 kB Cached: 132588 kB SwapCached: 0 kB Active: 26536644 kB Inactive: 17296272 kB HighTotal: 0 kB HighFree: 0 kB LowTotal: 49304856 kB LowFree: 4066708 kB SwapTotal: 39206624 kB SwapFree: 39206528 kB Dirty: 200 kB Writeback: 0 kB AnonPages: 249592 kB Mapped: 52712 kB Slab: 1049464 kB CommitLimit: 63859052 kB Committed_AS: 659384 kB PageTables: 3412 kB VmallocTotal: 34359738367 kB VmallocUsed: 478420 kB VmallocChunk: 34359259695 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 Hugepagesize: 2048 kB df reports no large consumption of memory from tmpfs filesystems.

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  • How can I erase the traces of Folder Redirection from the Default Domain Policy

    - by bruor
    I've taken over from an IT outsourcer and have found a struggle now that we're starting a migration to windows 7. Someone decided that they would setup Folder redirection in the Default Domain Policy. I've since configured redirection in another policy at an OU level. No matter what I do, the windows 7 systems pick up the Default Domain Policy folder redirection settings only. I keep getting entries in the event log showing that the previously redirected folders "need to be redirected" with a status of 0x80000004. From what I can tell this just means that it's redirecting them locally. Is there a way I can wipe that section of the GPO clean so it's no longer there? I'm hesitant to try to reset the default domain policy to complete defaults. ***UPDATE 6-26 I found that the following condition occurred and was causing the grief here. I've already implemented the new policies for clients, and for some reason, XP was working great, 7 was refusing to process. The DDP was enforced. Because of this, and the fact that the folder redirection policies were set to redirect back to the local profile upon removal, it was forcing clients to pick up it's "redirect to local" settings. Requirements for to recreate the issue. -Create a new test OU and policy. -Create some folder redirection settings, set them to redirect to local upon removal -Remove settings on that GPO -Refresh your view of the GPO and check the settings. -You'll notice that the settings show "not configured" entries for folder redirection. -Enforce this GPO -Create another sub-OU -Create a GPO linked to this sub-ou and configure some folder redirection settings. -Watch as the enforced GPOs "not configured" setting overrides the policy you just defined. I've had to relink the DDP to all OU's that have "block inheritance" enabled, and disable the "enforced" option on the DDP as a workaround. I'd love to re-enable enforcement of the DDP, but until I can erase the traces of folder redirection settings from the DDP, I think I'm stuck.

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  • Samba 3.5 Shadow Copy for Windows 7

    - by Prashanth Sundaram
    Over the past several days I have been trying to get the shadow to work with samba but haven’t been successful. Can someone check below config and let me know if I am missing something? We are using Equallogic SAN and iSCSI LUNS to mount volumes. I can cleanly access samba shares on Windows 7 clients but just not shadow copy. I have referred the official how-to but couldn’t get it to work. I see these messages in the logs. Any help is deeply appreciated. [2012/10/31 12:20:53.549863, 0] smbd/nttrans.c:2170(call_nt_transact_ioctl) FSCTL_GET_SHADOW_COPY_DATA: connectpath /fs/test-01, failed. [2012/10/31 12:21:13.887198, 0] modules/vfs_shadow_copy2.c:734(shadow_copy2_get_shadow_copy2_data) shadow:snapdir not found for /fs/test-01 in get_shadow_copy_data [2012/10/31 12:21:13.887265, 0] smbd/nttrans.c:2170(call_nt_transact_ioctl) FSCTL_GET_SHADOW_COPY_DATA: connectpath /fs/test-01, failed. == Samba pkgs == samba-3.5.10-116.el6_2.x86_64 samba-common-3.5.10-116.el6_2.x86_64 samba-winbind-clients-3.5.10-116.el6_2.x86_64 samba-client-3.5.10-116.el6_2.x86_64 === df –h == First is the iSCSI LUN and 2 others are snapshots. /dev/mapper/eql-0-fs-test01 5.0G 2.3G 2.5G 48% /fs/test-01 /dev/mapper/eql-2-0+fs-test01 5.0G 2.3G 2.5G 48% /fs/test-01/@GMT-2012.10.26-17.32.42/fs/test-01 (SNAPSHOT-1) /dev/mapper/eql-d-0+fs-test01 5.0G 2.3G 2.5G 48% /fs/test-01/@GMT-2012.10.31-11.52.42/fs/test-01 (SNAPSHOT- 2) ===/etc/samba/smb.conf === [global] workgroup = DOMAIN server string = Samba Server Version %v security = ads realm = DOMAIN.CORP encrypt passwords = yes guest account = nobody map to guest = bad uid log file = /var/log/samba/%m.log domain master = no local master = no preferred master = no os level = 0 load printers = no show add printer wizard = no printable = no printcap name = /dev/null disable spoolss = yes follow symlinks = yes wide links = yes unix extensions = no [test] comment = Test Directories path = /fs/test-01 vfs objects = shadow_copy2 #shadow_copy2: sort = desc #shadow: localtime = yes #shadow: snapdir = /fs/test-01/test #shadow: basedir = /fs/test-01 guest ok = yes writeable = yes map archive = no force create mode = 0660 force directory mode = 2770 inherit owner = yes inherit permissions = yes All feedback is welcome. Thanks!

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  • Dual Monitor support rdp 7 to win 7 on esxi

    - by rphilli5
    I am trying to RDP from a Windows 7 Professional dual monitor physical machine to a Windows 7 Professional VM hosted on esxi 4.0. I can get the spanning option to work to both monitors, but I have tried 3 different methods of connecting but have not been able to use true multiple monitors. At different times, I tried checking the "use all monitors" option, command line mstsc /multimon and added the line use multimon:i:1 to the .rdp file. None of these worked. Any ideas? The physical machine can connect to other Windows 7 physical machines with true multi monitor access. I also have the same issue when going from a 32bit RC1 machine to a Windows 7 Professional x64, but not when going in the reverse direction. Here's the .rdp: screen mode id:i:2 use multimon:i:1 desktopwidth:i:1440 desktopheight:i:900 session bpp:i:16 winposstr:s:0,1,341,118,1139,568 compression:i:1 keyboardhook:i:2 audiocapturemode:i:0 videoplaybackmode:i:1 connection type:i:1 displayconnectionbar:i:1 disable wallpaper:i:1 allow font smoothing:i:0 allow desktop composition:i:0 disable full window drag:i:1 disable menu anims:i:1 disable themes:i:1 disable cursor setting:i:0 bitmapcachepersistenable:i:1 full address:s:192.168.1.5 audiomode:i:0 redirectprinters:i:1 redirectcomports:i:0 redirectsmartcards:i:1 redirectclipboard:i:1 redirectposdevices:i:0 redirectdirectx:i:1 autoreconnection enabled:i:1 authentication level:i:2 prompt for credentials:i:0 negotiate security layer:i:1 remoteapplicationmode:i:0 alternate shell:s: shell working directory:s: gatewayhostname:s: gatewayusagemethod:i:4 gatewaycredentialssource:i:4 gatewayprofileusagemethod:i:0 promptcredentialonce:i:1 use redirection server name:i:0 drivestoredirect:s:

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  • Postgresql base backup script

    - by Terry Lorber
    I'm using the following script to do a file-level backup of Postgresql. I sometimes see that the last part, to do cleanup after "pgs_backup_stop" is called, hangs while it waits for the last WAL to be created. The REF_FILE to search for is sometimes wrong. I'm also shipping these files to a different machine, every 5 minutes via rsync. What do other people do to safely remove old WAL files? #!/bin/bash PGDATA=/usr/local/pgsql/data WAL_ARCHIVE=/usr/local/pgsql/archives PGBACKUP=/usr/local/pgsqlbackup PSQL=/usr/local/pgsql/bin/psql today=`date +%Y%m%d-%H%M%S` label=base_backup_${today} echo "Executing pg_start_backup with label $label in server ... " CP=`$PSQL -q -Upostgres -d template1 -c "SELECT pg_start_backup('$label');" -P tuples_only -P format=unaligned` RVAL=$? echo "Begin CheckPoint is $CP" if [ ${RVAL} -ne 0 ] then echo "PSQL pg_start_backup failed" exit 1; fi echo "pg_start_backup executed successfully" echo "TAR begins ... " pushd $PGBACKUP tar -cjf pgdata-$today.tar.bz2 --exclude='pg_xlog' $PGDATA/* popd echo "TAR completed" echo "Executing pg_stop_backup in server ... " $PSQL -Upostgres template1 -c "SELECT pg_stop_backup();" if [ $? -ne 0 ] then echo "PSQL pg_stop_backup failed" exit 1; fi echo "pg_stop_backup done successfully" TO_SEARCH="*${CP:0:2}000000${CP:3:2}.00${CP:5}" echo "Check for ${WAL_ARCHIVE}/${TO_SEARCH}.backup" while [ ! -e ${WAL_ARCHIVE}/${TO_SEARCH}.backup ]; do echo "Waiting for ${WAL_ARCHIVE}/${TO_SEARCH}.backup" sleep 1 done REF_FILE="`echo ${WAL_ARCHIVE}/*${CP:0:2}000000${CP:3:2}`" echo "Reference file ${REF_FILE}" # "-not -newer" or "\! -newer" will also return REF_FILE # so you have to grep it out and use xargs; otherwise you # could also use the -delete action find ${WAL_ARCHIVE} -not -newer ${REF_FILE} -type f | grep -v "^${REF_FILE}$" | xargs rm -f REF_FILE="`echo ${PGBACKUP}/pgdata-$today.tar.bz2`" echo "Reference file ${REF_FILE}" find $PGBACKUP -not -newer ${REF_FILE} -type f -name pgdata* | grep -v "^${REF_FILE}$" | xargs rm -f

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  • Does WebDAV even work on IIS 7? I say nay

    - by FlavorScape
    I've tried every configuration from the top 10 stack overflow and server fault results for WebDAV 405 on IIS (for verb PROPFIND and PUT). I'm running server 2008 SP2. Followed all the instructions here. I'm no stranger to configuring servers. This has gotten nowhere after 8 hours. Confirmed system.webserver in applicationhost.config: <add name="WebDAV" path="*" verb="PROPFIND,PROPPATCH,MKCOL,PUT,COPY,DELETE,MOVE,LOCK,UNLOCK" modules="WebDAVModule" resourceType="Unspecified" requireAccess="None" /> Port 443 with basic auth, same issue. Tried port 80 with windows auth. Broken. (405) Windows authentication. Check. Added authoring rules for default site and application. Check. Not the firewall. Check. added "Desktop Experience" role feature Tried HTTPS with Basic Authentication on port 443. Does not work. No other services are running like Sharepoint. Check. confirmed user has read/write NT level permissions for the folder/virtual dir tried net use * http://localhost /user:MYDOMAIN\me myPass get error 1920, if I don't authenticate I get error 67 confirmed I'm not applying filtering to WebDAV: <requestFiltering> <fileExtensions applyToWebDAV="false" /> <verbs applyToWebDAV="false" /> <hiddenSegments applyToWebDAV="false" /> 405 - HTTP verb used to access this page is not allowed. The page you are looking for cannot be displayed because an invalid method (HTTP verb) was used to attempt access. SHOULD I JUST GIVE UP? Other questions that helped none: 405 - ‘Method not Allowed’ adding service hosted in IIS7 webdav on iis7.5 - simply cannot make it work http://studentguru.gr/b/kingherc/archive/2009/11/21/webdav-for-iis-7-on-windows-server-2008-r2.aspx

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  • Limiting bandwidth on internal interface on Linux gateway

    - by Jack Scott
    I am responsible for a Linux-based (it runs Debian) branch office router that takes a single high-speed Internet connection (eth2) and turns it into about 20 internal networks, each with a seperate subnet (192.168.1.0/24 to 192.168.20.0/24) and a seperate VLAN (eth0.101 to eth0.120). I am trying to restrict bandwidth on one of the internal subnets that is consistently chewing up more bandwidth than it should. What is the best way to do this? My first try at this was with wondershaper, which I heard about on SuperUser here. Unfortunately, this is useful for exactly the opposite situation that I have... it's useful on the client side, not on the Internet side. My second attempt was using the script found at http://www.topwebhosts.org/tools/traffic-control.php, which I modified so the active part is: tc qdisc add dev eth0.113 root handle 13: htb default 100 tc class add dev eth0.113 parent 13: classid 13:1 htb rate 3mbps tc class add dev eth0.113 parent 13: classid 13:2 htb rate 3mbps tc filter add dev eth0.113 protocol ip parent 13:0 prio 1 u32 match ip dst 192.168.13.0/24 flowid 13:1 tc filter add dev eth0.113 protocol ip parent 13:0 prio 1 u32 match ip src 192.168.13.0/24 flowid 13:2 What I want this to do is restrict the bandwidth on VLAN 113 (subnet 192.168.13.0/24) to 3mbit up and 3mbit down. Unfortunately, it seems to have no effect at all! I'm very inexperienced with the tc command, so any help getting this working would be appreciated.

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  • Project and Business Document Organization

    - by dassouki
    How do you organize, maintain edits, revisions and the relationship between: Proposals Contracts Change Orders Deliverables Projects How do you organize your projects for re-usability? For example, is there a way to add tags to projects, to make them more accessible? What's a good data structure to dump all my files on an internet server for easy access? Presently, my work folder is setup as follows: (1)/work/ (2)/projects (3)/project_a (4)/final (which includes all final documents) (5)/contracts (5)/rfp_rfq (5)/change_orders (5)/communications (logs all emails, faxes, and meeting notes and minutes) (5)/financial (6)/paid (6)/unpaid (5)/reports (4)/old (include all documents that didn't make it into the project_a/final/ (3)/project_b (4) ... same as above ... (2)/references (3)/technical_references (3)/gov_regulations (3)/data_sources (3)/books (3)/topic_based (each area of my expertise has a folder with references in them) (2)/business_contacts (3)/contacts.xls (file contains all my contacts) (2)/banking (3)/banking.xls (contains a list of all paid and unpaid invoices as well as some cool stats) (3)/quicken (to do my taxes and yada yada) (4)/year (2)/education (courses I've taken (3)/webinars (3)/seminars (3)/online_courses (2)/publications (includes the publications I've made (3)/publication_id We're mostly 5 people working together part-time on this thing. Since this is a very structured approach, I find it really difficult to remember what I've done on previous projects and go back and forth easily. What are your suggestions on improving my processes? I'm open to closed and open source software (as long as the price isn't too high). I also want to implement a system where I can save most of the projects online to increase collaboration and efficiency and reduce bandwidth especially on document editing. Imagine emailing a document back and forth 5-10 times a day.

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  • Recommended programming language for linux server management and web ui integration

    - by Brendan Martens
    I am interested in making an in house web ui to ease some of the management tasks I face with administrating many servers; think Canonical's Landscape. This means doing things like, applying package updates simultaneously across servers, perhaps installing a custom .deb (I use ubuntu/debian.) Reviewing server logs, executing custom scripts, viewing status information for all my servers. I hope to be able to reuse existing command line tools instead of rewriting the exact same operations in a different language myself. I really want to develop something that allows me to continue managing on the ssh level but offers the power of a web interface for easily applying the same infrastructure wide changes. They should not be mutually exclusive. What are some recommended programming languages to use for doing this kind of development and tying it into a web ui? Why do you recommend the language(s) you do? I am not an experienced programmer, but view this as an opportunity to scratch some of my own itches as well as become a better programmer. I do not care specifically if one language is harder than another, but am more interested in picking the best tools for the job from the beginning. Feel free to recommend any existing projects that already integrate management of many systems into a single cohesive web ui, except Landscape (not free,) Ebox (ebox control center not free) and webmin (I don't like it, feels clunky and does not integrate well with the "debian way" of maintaining a server, imo. Also, only manages one system.) Thanks for any ideas! Update: I am not looking to reinvent the wheel of systems management, I just want to "glue" many preexisting and excellent tools together where possible and appropriate; this is why I wonder about what languages can interact well with pre-existing command line tools, while making them manageable with a web ui.

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  • Makecert.exe hangs

    - by Robert
    I was following the steps in Scott Hanselman's blog post describing how to create a certificate authority and code signing certificate for PowerShell scripts. Initially, I created the certificate authority and a personal certifcate and used it to sign a powershell script successfully. All went as described in the blog post. The problem starts (as most do) when I did something that was (probably) stupid, although it seemed reasonable at the time. I wanted to start over and repeat the process again with a clean slate, so from the mmc certificates snap-in console, I deleted the personal certificate and the certificate authority I created previously. After that any time I try to use makecert, (just as I did the first time around), makecert either hangs or faults (which prompts to end or debug). Did I hose something up by deleting via the certificates snap-in? It didn't complain or warn me that it could be potentially hazardous. Is this just coincidence and something else entirely could be hosed? I have Event Log entries from the times when makecert crashed, which all look very similar; here is one: Log Name: Application Source: Application Error Date: 8/5/2009 3:55:04 PM Event ID: 1000 Task Category: (100) Level: Error Description: Faulting application makecert.exe, version 6.0.6000.16384, time stamp 0x4545910b, faulting module ntdll.dll, version 6.0.6002.18005, time stamp 0x49e03821, exception code 0xc0000005, fault offset 0x00067409, process id 0xe58, application start time 0x01ca160efdf30625. Anyone have any ideas as to what exactly caused this and/or what I can do to fix it. I'm on 32-bit Vista Enterprise w/SP2.

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  • Migrating to Amazon AWS etc: What key statistics/questions should be analyzed and asked?

    - by cerd
    I searched SOverflow pretty extensively for something similar to this set of questions. BACKGROUND: We are a growing 'big(ish)' data chemical data company that are outgrowing our lab and our dedicated production workhorses. Make no mistake, we need to do some serious query optimization. Our data (It comes from a certain govt. agency so the schema and lack of indexing is atrocious). So yes, I know, AWS or EC2 is not a silver bullet in the face of spending time to maybe rework your queries/code entirely 'out of the box'. With that said I would appreciate any input on the following questions: We produce on CentOS and lab on Ubuntu LTS which I prefer especially with their growing cloud / AWS integration. If we are mysql centric, and our biggest problem is these big cartesian products that produce slow queries, should we roll out what we know after more optimization with respect to Ubuntu/mySQL with the added Amazon horsepower? Or is there some merit to the NoSQL and other technologies they offer? What are the key metrics I need to gather from apache and mysql other than like: Disk I/O operations, Data up/down avgs and trends and special high usage periods/scenarios? I've reviewed AWS/EC2 fine print, but want 2nd opinions. What other services aside from the basic web/database have proven valuable to you? I know nothing of Hadoop or many other technologies they offer, echoing my prev. question, do you sometimes find it worth it (Initially having it be a gamble aside from basic homework) to dive/break into a whole new environment and try to/or end up finding a way of more efficiently producing your data/site product? Anything I should watch out for in projecting costs, or any other general advice when working with AWS folks from anyone else where your company is very niche and very very technical (Scientifically - or anybody for that matter)? Thanks very much for your input - I think this thread could be valuable to others as well.

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  • What is optimal hardware configuration for heavy load LAMP application

    - by Piotr K.
    I need to run Linux-Apache-PHP-MySQL application (Moodle e-learning platform) for a large number of concurrent users - I am aiming 5000 users. By concurrent I mean that 5000 people should be able to work with the application at the same time. "Work" means not only do database reads but writes as well. The application is not very typical, since it is doing a lot of inserts/updates on the database, so caching techniques are not helping to much. We are using InnoDB storage engine. In addition application is not written with performance in mind. For instance one Apache thread usually occupies about 30-50 MB of RAM. I would be greatful for information what hardware is needed to build scalable configuration that is able to handle this kind of load. We are using right now two HP DLG 380 with two 4 core processors which are able to handle much lower load (typically 300-500 concurrent users). Is it reasonable to invest in this kind of boxes and build cluster using them or is it better to go with some more high-end hardware? I am particularly curious how many and how powerful servers are needed (number of processors/cores, size of RAM) what network equipment should be used (what kind of switches, network cards) any other hardware, like particular disc storage solutions, etc, that are needed Another thing is how to put together everything, that is what is the most optimal architecture. Clustering with MySQL is rather hard (people are complaining about MySQL Cluster, even here on Stackoverflow).

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  • MICR / Check printing

    - by drewk
    I want to print my own checks on blank stock from Quicken and QuickBooks. To do so, I need a virtual driver that intercepts the print output from Quicken formats the fields properly, and adds the MICR text at the bottom of the check. This is for Windows 7 or OS X. I have looked at the following: CHAX Works, but crashes a LOT. Not giving me confidence. It is also expensive. VersaCheck Looks promising but looks like it suffers severe feature bloat. I just want to print check and deposit slips, thank you. Ganson Is only for high volume really. It is also designed for batch use vs I just want to print to a virtual printer. More than $2500. GnuMICR is more of a science project. Not yet ready to use and has not been updated for years. There are a lot of solutions on the web, so please don't just google for me. I am looking for specific experience with good solid check printing solution. Thanks!!!

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  • Group Policy GPO not 'seen' at client

    - by fukawi2
    I have a new OU (natorg.local\NATO\Users) that I am trying to apply GP to. I have created a new user in this OU, and linked the 3 GPO's to this OU: DESKTOP - Folder Redirection (AppData) DESKTOP - Folder Redirection (Desktop) DESKTOP - Folder Redirection (Documents) Hopefully the names are sufficient to suggest what they do exactly. The settings are under User Settings so there is no Loopback processing required (if my understanding is correct). GP Modelling for the user and specific computer says that the GPOs will/should be applied, however on the client, gpresult doesn't even appear to see the GPOs under either "Applied" or "Not Applied": USER SETTINGS -------------- CN=Amir,OU=Users,OU=NATO,DC=natorg,DC=local Last time Group Policy was applied: 25/06/2012 at 11:07:13 AM Group Policy was applied from: svr-addc-01.natorg.local Group Policy slow link threshold: 500 kbps Applied Group Policy Objects ----------------------------- LAPTOPS - Power Settings WSUS - Set Server Address OUTLOOK - Auto Archive SECURITY - Lock Screen After Idle Default Domain Policy DESKTOP - Regional Settings NETWORK - Proxy Configuration NETWORK - IE General Config OFFICE - Trusted Locations OFFICE - Increase Privacy OUTLOOK - Disable Junk Filter DESKTOP - Disable Windows Error Reporting DESKTOP - Hide Language Bar NETWORK - Disable Skype DESKTOP - Disable Thumbs.db Creation WSUS - Set Server Address The following GPOs were not applied because they were filtered out ------------------------------------------------------------------- Local Group Policy Filtering: Not Applied (Empty) NETWORK - Google Chrome Configuration Filtering: Not Applied (Empty) SYSTEM - Event Log Configuration Filtering: Not Applied (Empty) SECURITY - Local Administrator Password Filtering: Not Applied (Empty) NETWORK - Disable Windows Messenger Filtering: Not Applied (Empty) SECURITY - Audit Policy Filtering: Not Applied (Empty) WSUS - Automatic Install Filtering: Not Applied (Empty) NETWORK - Firewall Configuration Filtering: Not Applied (Empty) DESKTOP - Enable Offline Files Filtering: Not Applied (Empty) I haven't altered permissions on the GPO's at all, no WMI filtering... As I said, GP Modelling says that they should be applied. GPResult on the client correctly identifies itself as being the correct OU (CN=Amir,OU=Users,OU=NATO,DC=natorg,DC=local) There are 2 x 2008R2 and a 2003 DC, domain is 2003 level, client is Windows XP SP3. Can anyone suggest why these GP Objects would be "invisible" to the client?

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  • Domino to Exchange 2007 (or 2010) Design Concerns?

    - by NickToyota
    Today we got the executive green light to proceed with changing from a Domino platform to Exchange. The business prefers Exchange for a messaging platform. (even though IMO IBM Domino is fine - if it aint broke, don't fix it but it was not my call). I have been put in charge of Domino to Exchange process goes smoothly as possible. I have also been told to put together costs for this project. I have some questions and concerns re: network design, licensing, costs: The current setup is as follows. 1 HQ office (100 users), 1 secondary office (50 users), 5 branch offices (under 10 users). 5 different email domains Windows Server 2003 functional level with a few 2008 R2 Servers Lotus Domino Notes Servers (one in each office) Ironmail Appliance Public Domino Web Mail server Majority G5+ Proliant Servers Domino Blackberry Enterprise license and server No VoIP phones What are the basic hardware requirements for Exchange 2007 or 2010? Can I simply purchase a single physical server? Will each office require an Exchange server or possibly additional servers (roles)? How is email routed to the smaller branch offices? Standard or Enterprise licenses? The business has been running Domino (messaging and application services) for over 10 years and also want Exchange to support email services, Blackberry, Outlook Web Access, possibly support for iPhone devices. Thank you Serverfault universe.

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  • When I ping Internet addresses like yahoo or Google, I get 2 reply packets and 2 lost packets.

    - by navi
    I have Airtel broadband and a Tata broadband connection. i have around 50 PCs connecting through an airtel broadband connection. Both are dsl connections with my phone line going into dsl modems and an Ethernet cable going from dsl modem directly into a switch. Currently, only airtel connection is connected with static IP on my private lan and using the airtel ISP DNS servers as DNS IP address and the default gateway is 192.168.1.1 (IP add. of the dsl modem). All PCs are connected in a work group. When in full use, my users complain of certain web pages are not opening. When I ping Internet addresses like Yahoo or Google I get 2 reply packets and 2 lost packets. I suspect that a single broadband connection is not able to sustain 50 simultaneous downloads/browsing. Is there any device which connect to both DSL and make one line so that its give me high speed simultaneous browsing. Help needed urgently. Thank you all to those who reply.

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  • Compaq R4000 laptop randomly locking up

    - by Josh
    I have a Compaq R4000 laptop with 2GB of RAM, running Ubuntu Linux 9.10. It is randomly locking up on me, approximately once every two days. I have a second partition with Windows XP Home installed, and I have had the system lock up in XP as well, meaning I believe this is a hardware issue. I have run two passes of Memtest86+ with no errors. The system has a fan that has died, so I initially suspected overheating. However the system just locked up on me while I was in the middle of typing a script to warn me / shut down if the temperature was too high. When the lockup happened the temperature was 88°F, so I am now starting to believe that may not be the issue. When the system locks up, I cannot SSH in nor ping it. Nothing shows in syslog when I reboot. I have configured it to send syslog messages to a local server as well and no messages appear on that server when the lockup happens. I am open to any and all advice!

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  • laptop headphone jack problems

    - by Xitcod13
    A while back my headphones mysteriously started making static noise and one of them stopped working completely. At first I thought it was headphones so I bought new ones. Alas that did not solve the problem. The problem must be inside my headphone jack. I did some research online and they suggested unplugging USB devices. Which has a strange effect of changing the static noises to high frequency Morse code noises (it's the aliens). I don't have this problem when i listen to music on speakers. The static is there on headphones whether there is music or not. I own a soldering iron for electronics and I am quite skilled at soldering. I would appreciate any help I can get. My laptop is the HDX 18. It has 2 headphone jacks that act exactly the same. Interesting thing i just noticed is that when i pull out my headphones almost all the way both of them start working but so do the speakers making the headphones kinda useless. Maybe there is a way to turn of the speakers as a temporary solution. I am using vista x64.

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  • wrt54gl reboots; troubleshooting steps?

    - by Bill
    I am using about 10 wrt54gl's in a small school. I am using a combination of stock firmware and Tomato 1.25, slowly moving towards all Tomato. We have had these devices installed for several years without problems. Recently, more and more of the units have started to spontaneously reboot, usually during high-traffic times (but not always). For the most part, the rebooting is not critical for us, but the wrt54gl's temporarily revert to 192.168.1.1 on the LAN ethernet ports and conflict with a critical server that's already installed with that IP. (Yes -- we plan to move the server off that address, but it is an involved process.) Both Tomato and the stock firmware (several versions from recent to several years old) exhibit the same problem: random reboots and reverting to 192.168.1.1 and conflicting temporarily with our server until the firmware boot process finishes. Here are my questions: Any way to prevent the wrt54gl's from reverting to 192.168.1.1 during the boot process? I was thinking of doing a custom firmware mod, although I hate to go that direction. Any steps to take in troubleshooting the reboots? Only some of the wrt54gl's reboot, which is odd. Others stay online for weeks and months without issues. Thanks.

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  • SQL Server 2005 - Linked Visual Foxpro Authorization

    - by John
    Here's the Scenario: We have an existing SQL 2000 Server that has a linked server to a share directory (on another server) containing Visual FoxPro tables; all connections work correctly. Porting the SQL 2000 server to a new SQL 2005 server results in questionable behavior: If you connect to the server, remotely, using Windows Authentication, you receive this error when running a query against the linked server: OLE DB provider "MSDASQL" for linked server "[linked server name]" returned message "[Microsoft][ODBC Visual FoxPro Driver]File 'MyTable.dbf' does not exist.". Msg 7350, Level 16, State 2, Line 2 Cannot get the column information from OLE DB provider "MSDASQL" for linked server "[linked server name]". However, logged in locally, the query works fine. The query also works correctly when logged in remotely, but using a SQL login. The only scenario I receive the error is when connected remotely, using windows authentication. As I mentioned before, this works on the SQL 2000 server, and both the old and new servers are running under the same network account (which has access to the folder the FoxPro files are in). Doing a little searching on the internet it looks like others have run into this situation, but I haven't found a resolution. Has anyone run into this before?

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  • I love google Chrome, but some non-static pages like Piwik render it unresponsive

    - by gogowitsch
    The web-stat software Piwik stops reacting on mouse clicks after 1-2 seconds. The same is true for Google Maps and Producteev (but GMail and most other pages work like a charm). These rely heavily on JS, and work without Flash. I can click for a very short time period and then the mouse cursor doesn't feel the UI anymore (it doesn't turn into a I over input fields, though it moves; if the freeze occured while the pointer was over an input field, the cursor keeps being a I) and all clicks on the DOM are being ignored by Chrome. No message appears, neither obvious nor in the Console (F12). There is no obstructing div or the like in the DOM (F12). Since I couldn't find any hints on the source of my problems, I suspected my plugins and extensions. Unfortunately, neither deactivating all plugins nor all extensions solved the problem. for the problematic pages, it always happens no Dropbox running several GB of free RAM the taskmanager doesn't show any high CPU or memory utilization (the offending tab uses 30 MB and uses 0-1 % CPU) all problematic pages work in other browsers (Chrome, Firefox, IE) the rest of the computer is very responsive the computers use different security suites (Kaspersky and Avira) The effect exists between several (synchronized) Chrome instances on different machines, all running Windows 7. Both the OS and Chrome are updated automatically. Other tabs and the Chrome chrome (tabs, menus, toolbar buttons of the browser itself) still work. I really don't like switching between browsers. Any ideas?

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  • Looking for a comprehensive/"expert" guide to BCD parameters

    - by Stilez
    I'm interested in educating myself about BCD on Windows 8. There are many, many "walkthrough" guides" and "howtos", but I can't find any guides at typical "enthusiast" level covering what each option or argument in a BCD /ENUM dump might mean, and the principles governing how these all work together. Imagine trying to rebuild or debug BCD (including EFI/BIOS variants and recovery/hibernate/memtest sections, and perhaps multiple boot Windows/WinPE/WinRE) from scratch using just BCDedit + DiskPart, and trying to understand rather than just copy/pasting commands. That's roughly the knowledge I'm after. Example questions might be: How is a BCD /ENUM dump to be read, item by item? How do its sections work together? (A lot of guides only show a specific example rather than explaining all the all common args that can exist and what they mean, they don't actually explain how sections work together, or they assume MBR/BIOS/Vista/7 and omit info needed for EFI/GPT/Dynamic disks/8) Partitions are specified by volume letter or as a \Device\HarddiskVolumeNNN. Why does it sometimes show these items as a letter and sometimes as a GUID? What are the practical differences if any? What exactly is syntax like "ramdisk=[C:]\Images\winpe.wim,{ramdiskoptions}" saying, and how will the drive letter "C" be interpreted at runtime in a line like this? Is the drive in such a line always "C:" (most examples assume so) and if not, when wouldn't it be? Many websites state that an sdi device and path may be needed in some sections of BCD, but what is sdi and what are these args doing when they appear? How does the GUID to HDD volume/partition mapping work under EFI/GPT? So that if disks or partitions/volumes change it's clear how one can confirm from basic principles whether data shown in BCD /ENUM ALL is still correct or not. Does anyone know of a suitable reference source for this kind of raw BCD data and structures? Thanks!

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  • Wordpress hacked. Disabled hacked site but bad traffic continues [closed]

    - by tetranz
    Possible Duplicate: My server's been hacked EMERGENCY My Ubuntu 10.04 LTS VPS has been hacked, probably via a WordPress site. I was alerted to it when I noticed the incoming traffic was unusually high. A WordPress site was littered with eval(base64_decode(...)) code in lots of files. My fault, I had some files writeable by www-data which shouldn't have been. I've disabled that site (a2dissite ... and restart Apache). This has reduced it but I am still getting some malware type traffic. My server runs several WordPress and Drupal sites and a home grown PHP site. I have captured traffic with tcpdump and looked at it Wireshark. It's reaching out to the login page of some Joomla sites, trying multiple logins. The traffic stops when I stop Apache. If I a2dissite every site and reload (not restart) Apache the traffic continues. At that point I have no virtual hosts running and no DocumentRoot in my apache2.conf so I don't know how Apache is still running something. I have searched the other sites with grep for likely looking php code with no success. I may have missed it but I haven't found anything suspicious in the Apache logs. I have mod-status running. I haven't really seen anything much there except that someone is still trying to do a POST to the theme page on the disabled WordPress site but they now get a 404. What should I be looking for? Are there any tools or whatever which would give me more info about how Apache is generating that traffic? Thanks

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