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Articles indexed Monday June 18 2012

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• Very slow first handshake Apache

  - by Johan Larsson

  Any one having any ideas where should I start to fix this issue, the first handshake take sometimes up to 20s, but refreshes after that takes only 0.9s. The setup, 100/10 Mbps Windows OS 4GB RAM Intel Core 2 @ 3.0 GHz And 7200 RPM HDD Apache 2.4 No SSL Mod_Security Enabled Mod_Deflate Enabled Mod_Expires Enabled Mod_ReWrite Enabled PHP & MySQL on same machine. I have seen much slower machines preforming better, therefor I think my problem is ony an optimization issue.

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• How to force a host to not send a broadcast for an IP address in its own subnet?

  - by Bruce

  For a LAN, instead of a switch, I have built a topology where each machine is connected to a router. Each host is assigned an IP address from 10/8. Here are the interface details: Lets say I ping 10.16.0.3 from this host. The routing table of 10.16.0.2 has been configured to use the router (10.16.0.1) as the default gateway. But since the destination IP address (10.16.0.3) is in the same subnet it sends out an ARP broadcast. I want to disable this behavior of sending an ARP broadcast and instead force it to use the routing table. How do I accomplish this?

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• What value does SenderID provide over SPF and DKIM?

  - by makerofthings7

  I understand that SPF "binds" a message envelope to a set of permitted IP addresses. SenderID (with the default pra option) "binds" the message header to a set of permitted IPs in addition to the SPF logic. DKIM "binds" the from address header (and any additional header the sender chooses), and the body to a DNS Domain name I'm using the word "bind" above instead of "authorized" because it makes more sense (to me) Questions: If SPF is already verifies a message FROM in the envelope, why is there a need to check the headers? When would the need to verify the envelope (SPF) need to be different than the headers (SenderID) If I'm already verifying the headers with DKIM, why do I need SenderID? Most large companies I've checked don't disable SenderID with an explicit record. EBay is a notable example of one that does. What is the rationale for disabling SenderID "pra" processing of outbound messages?

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• nginx inserting extra characters in Multi-status reply body

  - by user125011

  Here's the setup. I've got one server running apache/php hosting ownCloud. Among other things, I'm using to do CardDAV contact syncing. In order to make things work with my domain I have an nginx server running on the frontend as a reverse-proxy to the ownCloud server. My nginx config is as follows: server { listen 80; server_name cloud.mydomain.com; location / { proxy_set_header X-Forwarded-Host cloud.mydomain.com; proxy_set_header X-Forwarded-Proto http; proxy_set_header X-Forwarded-For $remote_addr; client_max_body_size 0; proxy_redirect off; proxy_pass http://server; } } The problem is that when my phone does a PROPFIND on the server, nginx adds extra characters to the content body that throw the phone off. Specifically, it prepends d611\r\n at the front of the body and appends 0\r\n\r\n to the end of the content. (I got this from wireshark.) It also re-chunks the result. How do I get nginx to send the original content as-is?

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• Vmware sphere setting up external network

  - by Tom Beech

  I've just setup vmware vsphere 5 on a remote server (rented dedicated server). I've added my first VPS (centos 5.8) barebones. It's not finding any IP (internal or external) on boot. I've had an extra external IP assigned to my server that I wanted to use on the VPS. I tried editing the eth0 config and adding the IP in there and turning off the DHCP, but it can't find any IP or ping google or do any networking type things. How do I route the IP to my VPS so I can access it remotely?

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• Setting up Ubuntu Server on Amazon EC2 for hosting multiple domains with wildcard subdomains

  - by Ashish Kumar

  I'm trying to set up multiple domains on my Amazon EC2 micro instance running Ubuntu Server 12.04. I installed Apache correctly and set up virtual hosts but having problems with wildcard subdomains. This is what my httpd.conf file looks like NameVirtualHost *:80 <VirtualHost *:80> UseCanonicalName Off VirtualDocumentRoot /home/username/domains/%0/html/ </VirtualHost> My DNS records (on Amazon Route 53) are: domain.tld A 1.2.3.4 *.domain.tld A 1.2.3.4 If i create a test.domain.tld directory with the html subdirectory, it works fine. But what I want to do is to redirect *.domain.tld to domain.tld in case there is no directory for the sub-domain accessed. I would also like www.domain.tld to redirect to domain.tld. The system should also work if I decide to host another website, example.com, on the server. I tried Googling a lot but without any luck. Suggestions?

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• Memcached Lagging

  - by Brad Dwyer

  Let me preface this by saying that this is a followup question to this topic. That was "solved" by switching from Solaris (SmartOS) to Ubuntu for the memcached server. Now we've multiplied load by about 5x and are running into problems again. We are running a site that is doing about 1000 requests/minute, each request hits Memcached with approximately 3 reads and 1 write. So load is approximately 65 requests per second. Total data in the cache is about 37M, and each key contains a very small amount of data (a JSON-encoded array of integers amounting to less than 1K). We have setup a benchmarking script on these pages and fed the data into StatsD for logging. The problem is that there are spikes where Memcached takes a very long time to respond. These do not appear to correlate with spikes in traffic. What could be causing these spikes? Why would memcached take over a second to reply? We just booted up a second server to put in the pool and it didn't make any noticeable difference in the frequency or severity of the spikes. This is the output of getStats() on the servers: Array ( [-----------] => Array ( [pid] => 1364 [uptime] => 3715684 [threads] => 4 [time] => 1336596719 [pointer_size] => 64 [rusage_user_seconds] => 7924 [rusage_user_microseconds] => 170000 [rusage_system_seconds] => 187214 [rusage_system_microseconds] => 190000 [curr_items] => 12578 [total_items] => 53516300 [limit_maxbytes] => 943718400 [curr_connections] => 14 [total_connections] => 72550117 [connection_structures] => 165 [bytes] => 2616068 [cmd_get] => 450388258 [cmd_set] => 53493365 [get_hits] => 450388258 [get_misses] => 2244297 [evictions] => 0 [bytes_read] => 2138744916 [bytes_written] => 745275216 [version] => 1.4.2 ) [-----------:11211] => Array ( [pid] => 8099 [uptime] => 4687 [threads] => 4 [time] => 1336596719 [pointer_size] => 64 [rusage_user_seconds] => 7 [rusage_user_microseconds] => 170000 [rusage_system_seconds] => 290 [rusage_system_microseconds] => 990000 [curr_items] => 2384 [total_items] => 225964 [limit_maxbytes] => 943718400 [curr_connections] => 7 [total_connections] => 588097 [connection_structures] => 91 [bytes] => 562641 [cmd_get] => 1012562 [cmd_set] => 225778 [get_hits] => 1012562 [get_misses] => 125161 [evictions] => 0 [bytes_read] => 91270698 [bytes_written] => 350071516 [version] => 1.4.2 ) ) Edit: Here is the result of a set and retrieve of 10,000 values. Normal: Stored 10000 values in 5.6118 seconds. Average: 0.0006 High: 0.1958 Low: 0.0003 Fetched 10000 values in 5.1215 seconds. Average: 0.0005 High: 0.0141 Low: 0.0003 When Spiking: Stored 10000 values in 16.5074 seconds. Average: 0.0017 High: 0.9288 Low: 0.0003 Fetched 10000 values in 19.8771 seconds. Average: 0.0020 High: 0.9478 Low: 0.0003

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• HP Procurve Issue Passing Multiple VLANs over a link

  - by MichaelRwat

  Just to start off with I am a Cisco guy that got placed into an HP project. Basic topology overview from outside in: ASA 5505 with two Ethernet connections to a 2910-24 port switch. This switch is then (Cisco Trunking) to a 2626 switch passing vlan (1 untagged and 100 tagged)between them. I created SVI's on each of the switches for both VLAN's for testing purposes. I can not get vlan 100 to pass across this link. I also have trunks configured to AP's off of the switch and can not ping the vlan 100 BVI on the AP's but can reach the vlan 1 BVI. Port 25 on Access layer (2626) connects (trunks) with port A1 of 2610. STP is not running at all on any switch (this is not my network I can't change this nor did I design this) Distribution Sw: MP1-0# show run ip default-gateway 10.100.100.100 vlan 1 name "DATA" untagged 1-22,24-A1,B1 ip address 10.100.100.6 255.255.255.0 no untagged 23 exit vlan 100 name "GUEST" untagged 23 tagged 24-A1 ip address 10.100.102.6 255.255.255.0 exit Access Sw: ip default-gateway 10.100.100.100 vlan 1 name "DEFAULT_VLAN" untagged 1-26 ip address 10.100.100.5 255.255.255.0 exit vlan 100 name "GUEST" ip address 10.100.102.5 255.255.255.0 tagged 15,25 exitt From the ASA I can ping the vlan 100 address of the 2610 but not the 2626 (10.100.102.6)[Not passing the "trunk"] If I plug into an access port vlan 100 of the 2626 I can ping the SVI for vlan 100 as intended. I can not ping across the "trunk" over vlan 100 but I can across vlan 1. There may be something obvious I'm missing but please review my configuration and thank you for the assistance.

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• One of my apache processes is huge - how can I find out why?

  - by Malcolm Box

  I'm running Apache 2.2.12 with mod_wsgi, hosting a Django site. Most of the apache child processes weigh in at about 125MB RSS, but occasionally I see one child balloon to 1GB RSS. At this point there's usually 1 huge process (1GB), a couple of large ones (500MB) and the rest are still ~125MB. These are the mod_wsgi daemon processes. I've tried using memory leak tracing in Python to see if it's the Django code, and I see no leaks. Looking in the logs doesn't show any particularly strange requests. I'm stumped on how to figure out what's causing this - any ideas? Also, any workaround ways to kill the large apache process when it gets too big, without bringing apache down? Some more details: Not using mod_php Using pre-fork

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• Batch Script With SQLCMD Usage

  - by user52128

  Hi All I am Writing a Batch Script Which has to read a set of SQL Files which exists in a Folder then Execute Them Using SQLCMD utiliy. When I am Trying to execute it does not create any output file. I am not sure where I am wrong and I am not sure how to debug the script. Can someone help me out with script? @echo off FOR %F IN (C:\SQLCMD\*.SQL) DO sqlcmd -S LENOVO-C00 -U yam -P yam!@ -i %F -o C:\SEL.txt -p -b IF NOT [%ERRORLEVEL%] ==[0] goto get_Error :Success echo Finished Succesffuly exit /B 0 goto end :get_error echo step Failed exit /B 40 :end

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• How can I send a Wake on Wireless LAN (WoWLAN) / Wake on Demand request manually?

  - by pioto

  This is similar to, but not the same as, http://serverfault.com/questions/1721/is-wireless-wake-on-lan-possible. I know it is supposed to be possible. The question is, how do I do whatever the AirPort Basestation will do? All I can find so far is that supposedly I need to send something with Wireless Multimedia Extensions (WMM): Basically, I want to be able to wake up my Mac Mini remotely, probably using my Linux laptop. Does anyone know of a tool to do this? Basic Wake on LAN tools do not seem to be the right thing. I don't need the Sleep Proxy Service bit, because I already know the MAC address of the system I want to wake up.

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• Remote desktop sessions - Unwanted automatic log off after period of time

  - by alex

  I'm having an issue whenever I connect to any of our servers via RDP - After a certain period of time, it seems to close these sessions, closing all the applications i had open etc... This is particularly annoying if I am running a long process - for example, copying a file - it cuts it off... I then re-connect via RDP, and it effectively loads a new session. Is this set somewhere in Group Policy? Or somewhere else? This is happening on Windows 2008 (it may also be on our 2003 servers, although I haven't noticed...)

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• apache - virtual host logging

  - by imaginative

  I have a virtualhost setup with usecanonicalname off. I have ServerName domain.com set and ServerAlias *.domain.com in the virtualhost. Using apache2's %v LogFormat string will only capture domain.com, and I'm trying to get it to capture foo.domain.com so I can split logs accordingly. LogFormat I'm currently using is LogFormat "%v %h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" vhost_combined

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• Permissions on mac for itunes library with multiple users - idea

  - by John

  I currently have a lot of music on an external drive and my itunes set up from there. However, periodically, when the external drive isn't connected, itunes will default back to the library location of my home directory user path. I don't want to mess with an external drive, as my mac HD is large enough to house the music collection. However, I have 4 family members - all with their own logins - using this same gob of music. I don't want 4 copies of the library, only one with all libraries referencing it. So, what I want to do is: 1 - move all music files to a shared directory at /Macintosh HD/users/music. I created this directory and adjusted permissions, so all four users can read and write to this directory. 2 - get all four accounts to reference this library instead of the external or local home locations I am hoping I can just check the box to keep library organized in my account, which is the admin and let itunes move it all. Then delete current libraries for each account and re-add from the new shared location. Will the itunes organization process cause permissions issues either by setting permissions to all the files access to my account only or write permissions or any other 'gotcha'? I am having a hard time coming up with a smooth solution that won't break everything and cause me to have mega duplicates or access issues. I would prefer not to do any xml library file editing if possible. Am I dreaming? Thanks for help.

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• Why is my Network Connections list empty?

  - by DealerNextDoor

  I'm sure this question has been asked before, but none of the links I have found have worked. I've been trying to find fixes for the past couple of weeks. This all started a few days after I got my router. At first, I thought it was just something that would fix it self. But as usual, it never does. I am trying to update my router's wireless card to try and fix this problem, but I need to get the card's information to update it on the HP website. And since my Network Connections list is empty, I can't get any information about it. So to get around this, I tried to go to 'Manage Wireless Networks', and when I tried to get the properties from there, I get this error: Windows has encounter an error saving the wireless profile. Specific Error: The data is invalid. So, what all can I do to try and fix this? Any help will be appreciated. EDIT: Sorry, forgot to put router info. Router Model: WNR1000v2-V2 Router Maker: NETGEAR Router Firmware Version: V1.0.0.12NA The router is up-to-date on all updates.

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• Saving ink when printing?

  - by Walkerneo

  I need a map of the SMC campus, but I'm really sick of running out of ink after printing one thing and then having to pay ridiculous sums of money to buy more ink. The map is here: http://www.smc.edu/campusmap/images/SMC-2D-Map_12-Clr_9-10_crop.jpg I would print in black and white, but I'm wondering if there are any chrome or photoshop extensions, or even websites that transform the image into something more ink-conservative. For example, I don't need the buildings to be a solid color, or the roads to be gray, so it would be a tremendous waste of ink to print it as is. Anyone know anything like I'm talking about?

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• My 5.1 audio system not working properly when I connect to Internet

  - by Gemboz

  I just bought a Genuis 5005 5.1 audio system, and I have an issue with it: It won't work properly when I get on the Internet (the central speaker isn't working). I also bought an Asus Xonar DG 5.1 sound card which works perfectly. I installed it and also installed the driver for it. When I play music/videos from my hard drive, all the speakers work fine, but when I connected to Internet to play videos/music, the center speaker won't work. How can I fix this issue?

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• Most efficient way to use a laptop like a desktop? [closed]

  - by user74757

  When I'm at home (which is the vast majority of the time now in Summer), I rarely use my laptop away from my desk. When it is at the desk, I plug in a monitor through HDMI, a power cable, and a mouse and keyboard that always stay there. I was wondering if anyone had any recommendations as to a good dock or product that does a good job of transforming a laptop into a true "desktop replacement." Ideally, it would allow all the connections to remain in place, with minimal effort to take the laptop in and out of the fixture. Thanks for any suggestions!

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• How to make a pxe bootable 10MegaByte or larger dos image?

  - by rjt

  Would like to make a "massive" DOS floppy disk image, say 10MegaBytes or more containing all the firmware updates i need for any system, harddrive, BIOS. i do not need the DOS image to be networkable as everything will be on the PXE booted image, but networking would be nice. Since ZipDisks were attached to the floppy disk controller and were over 100MegaBytes, this should be possible. i tried a long time ago to do this and spent too much time on it only to have it fail to boot. So if someone has reliable instructions on how to create such a nightmarish beast and edit it, please let me know. One image that can used for PXE and copied to a USB stick would be a plus. Too bad manufacturers don't supply a single bootable Linux ISO containing all their firmware updates, that would be easy to boot over-the-lan and have networking. HP servers do this and it is awesome.

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• ISCSI Target Ubuntu

  - by erai

  I'm trying to setup iscsitarget on Ubuntu 12.04 but I can't connect to it. On the windows machine it says Target Error. with no other output. My ietd.conf is Target iqn.2012-06.com.org:virtual_machines.lun Lun 0 Type=fileio,Path=/media/volume0/storlun0.bin When I run iscsiadm -m discovery -t st -p localhost The output is iscsiadm: Connection to Discovery Address 127.0.0.1 failed iscsiadm: Login I/O error, failed to receive a PDU iscsiadm: retrying discovery login to 127.0.0.1 iscsiadm: Connection to Discovery Address 127.0.0.1 closed iscsiadm: Login I/O error, failed to receive a PDU iscsiadm: retrying discovery login to 127.0.0.1 iscsiadm: Connection to Discovery Address 127.0.0.1 failed iscsiadm: Login I/O error, failed to receive a PDU iscsiadm: retrying discovery login to 127.0.0.1 iscsiadm: Connection to Discovery Address 127.0.0.1 failed iscsiadm: Login I/O error, failed to receive a PDU iscsiadm: retrying discovery login to 127.0.0.1 iscsiadm: Connection to Discovery Address 127.0.0.1 failed iscsiadm: Login I/O error, failed to receive a PDU iscsiadm: retrying discovery login to 127.0.0.1 iscsiadm: connection login retries (reopen_max) 5 exceeded iscsiadm: Could not perform SendTargets discovery. dmesg output: [ 3324.804665] iscsi_trgt: Removing all connections, sessions and targets [ 3325.875343] iSCSI Enterprise Target Software - version 1.4.20.3 [ 3325.875415] iscsi_trgt: Registered io type fileio [ 3325.875420] iscsi_trgt: Registered io type blockio [ 3325.875425] iscsi_trgt: Registered io type nullio

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• Change audio output depending on which one is on

  - by pkrish

  I have a PC that is hooked up to my HDTV (via a long hdmi cable) and to a monitor, which is in another room. I have speakers directly plugged to the PC audio out. The PC is next to the monitor and speakers. I am not sure but I think Windows can play sound on only 1 audio device at a time. And I can only set 1 device as the default output. I can get sound on the TV or speaker depending on which device I set to default. But I would have to do this every time I switch between using my TV or my monitor! Is there some way to configure such that sound plays through the TV if the TV is on, else it plays in the speakers? If this is not possible, then the next best alternative would be to get the sound to play on both the devices at the same time. Thanks!

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• Fixing Corrupted Text

  - by oort

  I Have text which looks like this: supposed to undergo yearly cardiac exam in order to stay on transplant list. But, there are patients who are missing important cardiac information. It is yo ur job as an intern on call to make sure that you fin As you can see, the first line is fine, but then the second line is corrupt. It looks like this even when I open it using Vim or LibreOffice. Is there a way to fix this? I've tried changing the encoding to UTF-8 but to no avail. Thanks!

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• find files where group permissions equal user permissions

  - by Jayen

  Is it possible to do something like find -perm g=u? I say "like" because -perm mode requires mode to specify all the bits, not just g, and because I can't put u on the right side of the =, like I can with the chmod command: you can specify exactly one of the letters ugo: the permissions granted to the user who owns the file (u), the permissions granted to other users who are members of the file's group (g), and the permissions granted to users that are in neither of the two preceding categories (o). At the moment, I'm doing find | xargs -d \\n ls -lartd | egrep '^.(...)\1 which is just ugly. Thanks.

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• Display won't come back from power saver mode

  - by tynor

  I wan't sure where exactly to post this question, but this one seemed the most relevant. I have a Dell LCD monitor running off a Dell Inspiron 531 tower with an Nvidia GeForce 8600 GT video card. Just recently, when I turn my computer on, the display immediately enters its "Power Saver" mode, and never wakes up. This problem doesn't occur with other computers, or even with this same computer when I use the integrated graphics. I have no other displays to test the card on. I have also tried replacing the power supply (my original one, which ran that video card for 4 years, was 300w, and I replaced it with 500w). Is there anything else I can try to troubleshoot this issue?

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• How do I prevent Pidgin from loading XMPP chat room history on join?

  - by Mr. Jefferson

  In Pidgin, when I join a chat room, it loads the chat room history. iChat on the Mac has a preference in the Accounts section to set a variable amount of history to load, or disable loading history entirely. How do I do the same thing in Pidgin? Is there a preference somewhere that I've missed? The object is to have the chat room start fresh each day, so I'd also be fine with disabling chat room history entirely on the server if that's possible. But I didn't see that option either when I looked in Server Admin on the server. I found this list of XMPP room types, and it looks like creating a Temporary Room might be the best way to do this, but I don't want to have to create the room manually every morning. Right now I've got Pidgin set to auto-join the room when I log in; I want it to do that without loading history. EDIT: The XMPP multi-user chat spec referenced above also contains a section on managing history. And I got this to work by pulling up the XMPP Console plugin in Pidgin, copying the <presence /> stanza it sent when I joined the room, closing the room, pasting the stanza into the console, adding the <history /> element and sending it. When I opened the room again, I had no history. But it all came back the next time! So: how do I get Pidgin to send the <history /> stanza by default?

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