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• Hyper-V Virtual Machine won't respond over network

  - by Brad Gignac

  Recently, one of our Hyper-V virtual machines has periodically stopped responding over the network. It seems to be happening every few days, and it occasionally happens up to several times a day. I am by no means a sysadmin, so any direction you guys could provide would be very welcome. I've included everything I know to include below. If you need any additional information, I'll be glad to include it. I can connect through the Hyper-V console. I can't connect to network shares, IIS web apps, using RDP, or using ping. Memory usage seems to be normal (3 of 4 GB) Processor usage seems low. We don't know the exact time the server goes down, but the following error appears consistently around the time it goes down: Error 5719, NETLOGON This computer was not able to set up as secure session with a domain controller in domain *** due to the following: There are currently no logon servers available to service the logon request. This may lead to authentication problems. Make sure that this computer is connected to the network. If this problem persists, please contact your domain administrator.

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• PhpMyAdmin Missing parameter:

  - by Ali

  Everything was working fine until this moment I want to create a new database and I'm receiving this error db_create.php: Missing parameter: new_db (FAQ 2.8) Also when I was trying to export my database I also receive the following error export.php: Missing parameter: what (FAQ 2.8) export.php: Missing parameter: export_type (FAQ 2.8) When I looked it FAQ 2.8 from the suggested link in PHPMYADMIN 2.8 I get "Missing parameters" errors, what can I do? Here are a few points to check: In config.inc.php, try to leave the $cfg['PmaAbsoluteUri'] directive empty. See also FAQ 4.7. Maybe you have a broken PHP installation or you need to upgrade your Zend Optimizer. See http://bugs.php.net/bug.php?id=31134. If you are using Hardened PHP with the ini directive varfilter.max_request_variables set to the default (200) or another low value, you could get this error if your table has a high number of columns. Adjust this setting accordingly. (Thanks to Klaus Dorninger for the hint). In the php.ini directive arg_separator.input, a value of ";" will cause this error. Replace it with "&;". If you are using Hardened-PHP, you might want to increase request limits. The directory specified in the php.ini directive session.save_path does not exist or is read-only. I did tried with php.ini to make sure that I've session.save_path = "/tmp" I'm using Mac Xserver and running with MAMP I did tried everything to restart my server and nothing help. Please if anyone help me to give me some suggestion. Apologize if I post in a wrong place.

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• Getting a "403 access denied" error instead of serving file (using django, gunicorn nginx)

  - by Finglish

  Getting a "403 access denied" error instead of serving file (using django, gunicorn nginx) I am attempting to use nginx to serve private files from django. For X-Access-Redirect settings I followed the following guide http://www.chicagodjango.com/blog/permission-based-file-serving/ Here is my site config file (/etc/nginx/site-available/sitename): server { listen 80; listen 443 default_server ssl; server_name localhost; client_max_body_size 50M; ssl_certificate /home/user/site.crt; ssl_certificate_key /home/user/site.key; access_log /home/user/nginx/access.log; error_log /home/user/nginx/error.log; location / { access_log /home/user/gunicorn/access.log; error_log /home/user/gunicorn/error.log; alias /path_to/app; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Scheme $scheme; proxy_pass http://127.0.0.1:8000; proxy_connect_timeout 100s; proxy_send_timeout 100s; proxy_read_timeout 100s; } location /protected/ { internal; alias /home/user/protected; } } I then tried using the following in my django view to test the download: response = HttpResponse() response['Content-Type'] = "application/zip" response['X-Accel-Redirect'] = '/protected/test.zip' return response but instead of the file download I get: 403 Forbidden nginx/1.1.19 Please note: I have removed all the personal data from the the config file, so if there are any obvious mistakes not related to my error that is probably why. My nginx error log gives me the following: 2012/09/18 13:44:36 [error] 23705#0: *44 directory index of "/home/user/protected/" is forbidden, client: 80.221.147.225, server: localhost, request: "GET /icbdazzled/tmpdir/ HTTP/1.1", host: "www.icb.fi"

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• Some HTTPS connections via NAT fail, but work on firewall itself.

  - by hnxn

  Hi, I am having trouble establishing some HTTPS connections from internal machines, even though these same connections work if initiated on the firewall itself. The firewall machine is running Ubuntu 10.04.1 and shorewall 4.4.6. The internet connection is Bell PPPoE DSL (in Canada). I have tried various MTU settings, it doesn't seem to make any difference. Other protocols (HTTP, FTP, etc) generally work. The problem seems to be limited to certain sites; this one never works from an internal machine, but always works from the firewall itself: From internal machine: $ wget https://images.fedex.com/images/ascend/shared/headers/nxgen/corp_logo.gif --2011-01-13 20:51:31-- https://images.fedex.com/images/ascend/shared/headers/nxgen/corp_logo.gif Resolving images.fedex.com... 184.24.96.69 Connecting to images.fedex.com|184.24.96.69|:443... connected. ^C From firewall: $ wget https://images.fedex.com/images/ascend/shared/headers/nxgen/corp_logo.gif --2011-01-13 20:58:28-- https://images.fedex.com/images/ascend/shared/headers/nxgen/corp_logo.gif Resolving images.fedex.com... 184.24.96.69 Connecting to images.fedex.com|184.24.96.69|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 840 [image/gif] Saving to: `corp_logo.gif' 2011-01-13 20:58:28 (149 MB/s) - `corp_logo.gif' saved [840/840] This URL always works from both internal and firewall: https://encrypted.google.com/images/logos/ssl_logo_lg.gif Any troubleshooting tips would be greatly appreciated!

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• DNS issue for internal website routing internet connection from remote location

  - by Michael Paul

  I have an issue that I could use some help with. Our company has a main location and a remote location. Previously, the remote location was connected to the main location through an internet connection VPN tunnel. The connection was pitifully slow at 1.5Mbps, so we upgraded it with a 75Mbps direct link. That meant the remote location lost it's internet access, so we routed their access through the main office internet connection. Everything works perfect except for one thing. The website we host is not accessible from the remote location unless the IP address is used. If I do NSLOOKUP on our website address from a machine connected to the main location network, it resolves correctly to the inside IP address. However, if I do the same from a remote location machine, it resolves to the website's outside IP address. Our internal DNS server(s) have a pointer and CNAME records set up, and everything was working perfectly before the connection was upgraded. In addition, the remote location has a domain controller, DNS server and DHCP server to service these requests at the remote location and prevent these requests from getting routed back and forth over the link. So I think was it happening is that for some reason the DNS server at the remote location is not resolving our website name correctly and passing the requests on to the routers, which then push the request out to the internet DNS system. That resolves the name to our external IP. This is purely a DNS issue, everything else works just fine. I am just stumped on this one. Any ideas on how to fix this? Edit: I forgot to mention that at the remote side of the link is a Cisco ASA-5505 and at the main office there is a Cisco ASA-5510. The link is connected between these 2 devices and the routing is handled in the 5510. Thanks, Michael

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• Migrateing to Windows Server 2008 R2 Domain Controllers - a few Questions/Issues

  - by Chris

  Ok so here's our setup: We have 2 Windows2k3 Domain Controllers. I am trying to replace them with Windows 2008 R2. The Win2k3 servers are DC01 and DC02. The Windows2k8 servers are DC1 and DC2. I prepared the Windows Server 2003 Forest Schema for a Domain Controller That Runs Windows Server 2008 or Windows Server 2008 R2. Then with both of the new servers up as member servers I dcpromo'd DC1 using the advanced option and added it successfully to my exisiting domain. Roles are GC, DNS and Active Directory Domain Services.I transferred The PDC, RID pool manager and Infrastructure master FSMO to the new DC.(DC1) The Schema master and Domain naming master are still on the old DC (DC01). The first issue I'm encountering is when i dcpromo the second DC (DC2) and select "Replicate data over the network from and existing domain controller" I select the new DC to replicate from (DC1) I get the following error: "Failed to identify the requested replica partner (dc1.xxx.org) as a valid domain controller with a machine account for (DC2$). This is likely due to either the machine account not being replicated to this domain controller because of replication latency or the domain controller not advertising the Active Directory Domain Services. Please consider retrying the operation with \dc01.xxx.org as the replica partner. "The server is unwilling to process the request." Is this because the Schema master and Domain naming master roles are still on the old DC (DC01)? And if so, if I transfer Schema master and Domain naming master roles to DC1 what is the risk or breaking my AD? I'm a little paranoid because this process HAS to be transparent. ANY down time or interruption will result in me getting a verbal ass kicking from my I.T. Director. Both of the new servers DNS point the the old DNS servers (DC01 and DC02) not themselves by the way. Thanks in Advance -Chris

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• Appears to be "randomly" switching between the acl matched backend and the default backend

  - by Xoor

  I have HAProxy acting as a proxy in front of: An NGinx instance An in-house load balancer in front of multiple dynamic services exposed with socket.io (websockets) My problem is that from time to time my connections are proxied correctly to my socket.io cluster, and then randomly it fallsback to routing to NGinx which obviously is annoying and meaningless since NGinx isn't mean't to handle the request. This happens when requesting for URLs of the format : http://mydomain.com/backends/* There's an ACL in the HAProxy config to match the '/backends/*' path. Here's a simplified version of my HAProxy config (removed extra unrelated entries and changed names): global daemon maxconn 4096 user haproxy group haproxy nbproc 4 defaults mode http timeout server 86400000 timeout connect 5000 log global #this frontend interface receives the incoming http requests frontend http-in mode http #process all requests made on port 80 bind *:80 #set a large timeout for websockets timeout client 86400000 # Default Backend default_backend www_backend # Loadfire (socket cluster) acl is_loadfire_backends path_beg /backends use_backend loadfire_backend if is_loadfire_backends # NGinx backend backend www_backend server www_nginx localhost:12346 maxconn 1024 # Loadfire backend backend loadfire_backend option forwardfor # This sets X-Forwarded-For option httpclose server loadfire localhost:7101 maxconn 2048 It's really quite confusing for me why the behaviour appears to be "random", since being hard to reproduce it's hard to debug. I appreciate any insight on this.

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• Issue with SSL using HAProxy and Nginx

  - by Ben Chiappetta

  I'm building a highly available site using a multiple HAProxy load balancers, Nginx web serves, and MySQL servers. The site needs to be able to survive load balancer or web servers nodes going offline without any interruption of service to visitors. Currently, I have two boxes running HAProxy sharing a virtual IP using keepalived, which forward to two web servers running Nginx, which then tie into two MySQL boxes using MySQL replication and sharing a virtual IP using heartbeat. Everything is working correctly except for SSL traffic over HAProxy. I'm running version 1.5 dev12 with openssl support compiled in. When I try to navigate to the virtual IP for haproxy over https, I get the message: The plain HTTP request was sent to HTTPS port. Here's my haproxy.cfg so far, which was mainly assembled from other posts: global log 127.0.0.1 local0 log 127.0.0.1 local1 notice # log 127.0.0.1 local0 user haproxy group haproxy daemon maxconn 20000 defaults log global option dontlognull balance leastconn clitimeout 60000 srvtimeout 60000 contimeout 5000 retries 3 option redispatch listen front bind :80 bind :443 ssl crt /etc/pki/tls/certs/cert.pem mode http option http-server-close option forwardfor reqadd X-Forwarded-Proto:\ https if { is_ssl } reqadd X-Proto:\ SSL if { is_ssl } server web01 192.168.25.34 check inter 1s server web02 192.168.25.32 check inter 1s stats enable stats uri /stats stats realm HAProxy\ Statistics stats auth admin:********* Any idea why SSL traffic isn't being passed correctly? Also, any other changes you would recommend? I still need to configure logging, so don't worry about that section. Thanks in advance your help.

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• How do I make rsync also check ctime?

  - by Benoît

  rsync detects files modification by comparing size and mtime. However, if for any reason, the mtime is unchanged, rsync won't detect the change, although it's possible to spot it by looking at the ctime. Of course, I can tell rsync do compare the whole files' contents, but that's very very expensive. Is there a way to make rsync smarter, for example by checking mtime+size are the same AND that ctime isn't newer than mtime (on both source and destination) ? Or should I open a feature request ? Here's an example: Create 2 files, same content and atime/mtime benoit@debian:~$ mkdir d1 && cd d1 benoit@debian:~/d1$ echo Hello > a benoit@debian:~/d1$ cp -a a b Rsync them to another (non-exisiting) directory: benoit@debian:~/d1$ cd .. benoit@debian:~$ rsync -av d1/ d2 sending incremental file list created directory d2 ./ a b sent 164 bytes received 53 bytes 434.00 bytes/sec total size is 12 speedup is 0.06 OK, everything is synced benoit@debian:~$ grep . d*/* d1/a:Hello d1/b:Hello d2/a:Hello d2/b:Hello Update file 'b', same size and then reset its atime/mtime benoit@debian:~$ echo World > d1/b benoit@debian:~$ touch -r d1/a d1/b Attempt to rsync again: benoit@debian:~$ rsync -av d1/ d2 sending incremental file list sent 63 bytes received 12 bytes 150.00 bytes/sec total size is 12 speedup is 0.16 Nope, rsync missed the change. benoit@debian:~$ grep . d*/* d1/a:Hello d1/b:World d2/a:Hello d2/b:Hello Tell rsync the compare the file content benoit@debian:~$ rsync -acv d1/ d2 sending incremental file list b sent 144 bytes received 31 bytes 350.00 bytes/sec total size is 12 speedup is 0.07 Gives the correct result: benoit@debian:~$ grep . d*/* d1/a:Hello d1/b:World d2/a:Hello d2/b:World

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• Is current SATA 6 gb/s equipment simply unreliable?

  - by korkman

  I have a 45-disk array of Seagate Barracuda 3 TB ST3000DM001 (yes these are desktop drives I'm aware of that) in a Supermicro sc847 JBOD, connected via LSI 9285. I have found a solution for the problem description below by reducing speed via MegaCli -PhySetLinkSpeed -phy0 2 -a0; for i in $(seq 48); do MegaCli -PhySetLinkSpeed -phy${i} 2 -a0; done and rebooting. The question remains: Is this typical for current 6 gb/s equipment? Is this the sad state of SATA storage? Or is some of my equipment (the sff-8088 cables come to mind) bad? The Problem was: Synchronizing HW RAID-6, disks kept offlining. Fetching SMART values reveiled that those which offlined did not increase powered-on hours anymore. That is, their firmware (CC4C) seems to crash. Digging into the matter by switching to Software RAID-6, with the disks passed-through, I got tons of kernel messages scattered across all disks, with 6 gb/s: sd 0:0:9:0: [sdb] Sense Key : No Sense [current] Info fld=0x0 sd 0:0:9:0: [sdb] Add. Sense: No additional sense information And finally, when a disk offlines: megasas: [ 5]waiting for 160 commands to complete ... megasas: [35]waiting for 159 commands to complete ... megasas: [155]waiting for 156 commands to complete ... megaraid_sas: pending commands remain after waiting, will reset adapter. Ugly controller reset here, then minutes later: megaraid_sas: Reset successful. sd 0:0:28:0: Device offlined - not ready after error recovery ... sd 0:0:28:0: [sdu] Unhandled error code sd 0:0:28:0: [sdu] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK sd 0:0:28:0: [sdu] CDB: Read(10): 28 00 23 21 2f 40 00 00 70 00 sd 0:0:28:0: [sdu] killing request Reduced speed to 3 gb/s like written above, all problems vanished.

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• SSL Returning Blank Page, No Catalina Errors

  - by Mr.Peabody

  This is my second, maybe third, time configuring SSL with Tomcat. Earlier I had created a self signed, which worked, and now using my signed is proving fruitless. I am using Tomcat, operating from the Amazon Linux API. When using the signed cert/keystore, my server is starting normally without errors. However, when trying to navigate to the domain it is giving me an "ERR_SSL_VERSION_OR_CIPHER_MISMATCH" error. My server.xml file looks as follows: <Connector port="8443" maxHttpHeaderSize="8192" maxThreads="150" minSpareThreads="25" maxSpareThreads="75" enableLookups="false" disableUploadTimeout="true" acceptCount="100" scheme="https" secure="true" SSLEnabled="true" clientAuth="false" sslProtocol="TLS" keystoreFile="/home/ec2-user/.keystore/starchild.jks" keystorePass="d6b5385812252f180b961aa3630df504" /> It couldn't hurt to also mention that I'm using a wildcard certificate. Please let me know if anything looks amiss! EDIT: After looking more into this, I've determined there may be nothing is wrong with the Server.xml, or the listening ports. This is becoming more of an actual certificate error, as the curl request is giving me this error: curl: (35) Unknown SSL protocol error in connection to jira.mywebsite.com:-9824 Though, I can't seem to figure out what the "-9824" is. When comparing this curl to another similar setup (using the same Wildcard Certificate) it's turning up the full handshake, which is to be expected. I believe this is now between the protocol/cypher set default on JIRA servers.

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• How to set only specific nginx server block into maintenance mode programmatically

  - by Ville Mattila

  I am looking for a solution to automate one of our application's deployment process. In the beginning of deployment, I would like to programmatically set the specified server into maintenance mode and finally after the deployment has been completed, remove the maintenance mode flag from the nginx server. By maintenance mode, I mean that nginx should response with HTTP Response Code 503 to all the requests (with possible custom page). I know how to set the server block to respond with 503 code (see http://www.cyberciti.biz/faq/custom-nginx-maintenance-page-with-http503/) but the question is about how to do this programmatically and most efficiently. Two options have came to my mind: Option 1: At the beginning of the deployment process, write a maintenance file into document root and conditionally check an existence of the maintenance file in nginx server config: server { if (-f $document_root/in_maintenance_mode) { return 503; } } This method contains certain overhead as the file existence is checked for each request. Is it possible to check the file existence only when loading the nginx config? Option 2: Deployment script replaces the whole nginx server configuration file with a maintenance version and swaps it back in the end of the deployment. If this method is used, I am concerned about possible other automation processes like puppet that may be override the maintenance configuration file.

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• All websites migrated from server running IIS6 to IIS7

  - by Leah

  Hi, I hope someone will be able to help me with this. We have recently migrated all of our clients' sites to a new server running IIS7 - all the sites were originally running on a server running IIS6. Ever since the migration, lots of our clients are reporting error messages. There seems to be quite a number of issues related to sending emails and also, we have had the following error message reported by several different clients: Server Error in '/' Application. -------------------------------------------------------------------------------- Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Web.HttpException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. I have read elsewhere that this error can appear if a button is clicked before the whole page has finished loading. But as this error has now appeared on multiple sites and only since the server migration, it seems to me that it must be something else. I was wondering if someone could tell me if there is something specific which needs to be changed for .NET sites when sites are moved from a server running IIS6 to a server running IIS7? I don't deal with the actual servers very much so I'm afraid this is very much a grey area for me. Any help would be very much appreciated.

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• Debian, Apache2, CGI: paths issue

  - by Bubnoff

  I have a perl form email script on the servers cgi-bin directory ( /usr/lib/cgi-bin ). /etc/apache2/sites-enabled/000-default ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch AddHandler cgi-script cgi pl Order allow,deny Allow from all </Directory> The issue is with paths. html calls script here: <form name="Request" method="post" action="http://server-test.local/cgi-bin/formprocessorpro.pl" onsubmit="return checkWholeForm49874(this)"> The directory with the templates and configs is passed here: <input type="hidden" name="base_path" value="../contact" /> The path to this form is: http://server-test.local/formstest/contact.htm No matter what variation I try for the base_path I get an error from the formprocessor script that it can't find the directory: An error occurred when opening the Form Configuration File (../contact/form.cfg): No such file or directory. I need to move this script from an old server, configured by a previous sysadmin, to a new server. Since cgi-bin is automatically linked to /usr/lib/cgi-bin and linked such that the script resides: http://server-test.local/cgi-bin/formprocessorpro.pl I would imagine that, given that the templates are in the webroot in a directory called contact, the correct path would be: ../contact Any ideas? It's been awhile since I've messed with CGI. Bubnoff

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• Why apache throws 403 on index file after install?

  - by den-javamaniac

  Hi. I've just installed apache and php from sources using next commands: ./configure --prefix="/mnt/workspace/servers/web/apache-2.2.17" \ --enable-info --enable-rewrite --enable-usertrack --enable-mime-magic for apache and ./configure --with-apxs2=/mnt/workspace/servers/web/apache-2.2.17/bin/apxs \ --prefix=/mnt/workspace/servers/web/apache-2.2.17/php \ --with-config-file-path=/mnt/workspace/servers/web/apache-2.2.17/php \ --with-mysql=mysqlnd for php. After adjusting configuration (httpd.conf) and starting apache it gives a 403 response on http://localhost:8060/index.html (presuming that 8060 is used) request. There are next directory settings in httpd.conf: <Directory "/mnt/workspace/servers/web/apache-2.2.17/htdocs"> ... Order allow,deny Allow from all ... </Directory> <IfModule dir_module> DirectoryIndex index.html index.php </IfModule> It should be noted that I've got apache on a mounted (default auto mount configured while installing ubuntu) partition. Log Files Access log: ::1 - - [12/Feb/2011:17:48:30 +0200] "GET / HTTP/1.1" 403 202 ::1 - - [12/Feb/2011:17:48:31 +0200] "GET /favicon.ico HTTP/1.1" 403 213 ::1 - - [12/Feb/2011:17:48:48 +0200] "GET /index.html HTTP/1.1" 403 212 ::1 - - [12/Feb/2011:17:48:48 +0200] "GET /favicon.ico HTTP/1.1" 403 213 ::1 - - [12/Feb/2011:17:49:03 +0200] "GET /index.html HTTP/1.1" 403 212 ::1 - - [12/Feb/2011:17:49:03 +0200] "GET /favicon.ico HTTP/1.1" 403 213 Error log: [Sat Feb 12 18:59:13 2011] [notice] Apache/2.2.17 (Unix) PHP/5.3.5 configured -- resuming normal operations [Sat Feb 12 18:59:22 2011] [error] [client ::1] (13)Permission denied: access to / denied [Sat Feb 12 18:59:22 2011] [error] [client ::1] (13)Permission denied: access to /favicon.ico denied [Sat Feb 12 18:59:36 2011] [error] [client ::1] (13)Permission denied: access to /index.html denied

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• Using %v in Apache LogFormat definition matches ServerName instead of specific vhost requested

  - by Graeme Donaldson

  We have an application which uses a DNS wildcard, i.e. *.app.example.com. We're using Apache 2.2 on Ubuntu Hardy. The relevant parts of the Apache config are as follows. In /etc/apache2/httpd.conf: LogFormat "%v %h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" vlog In /etc/apache2/sites-enabled/app.example.com: ServerName app.example.com ServerAlias *.app.example.com ... CustomLog "|/usr/sbin/vlogger -s access.log /var/log/apache2/vlogger" vlog Clients access this application using their own URL, e.g. company1.app.example.com, company2.app.example.com, etc. Previously, the %v in the LogFormat directive would match the hostname of the client request, and we'd get several subdirectories under /var/log/apache2/vlogger corresponding to the various client URLs in use. Now, %v appears to be matching the ServerName value, so we only get one log under /var/log/apache2/vlogger/app.example.com. This breaks our logfile analysis because the log file has no indication of which client the log relates to. I can fix this easily by changing the LogFormat to this: LogFormat "%{Host}i %h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" vlog This will use the HTTP Host: header to tell vlogger which subdirectory to create the logs in and everything will be fine. The only concern I have is that this has worked in the past and I can't find any indication that this has changed recently. Is anyone else using a similar config, i.e. wildcard + vlogger and using %v? Is it working fine?

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• HAproxy with MySQL Master-Master Replication incredibly slow

  - by Yayap

  I have two MySQL servers in multi-master mode, with an HAproxy machine for simple load balancing/redundancy. When I am connected to one of the servers directly and try to update about 100,000 entries, it is completed including replication in about half a minute. When connecting through the proxy it takes usually over three whole minutes. Is it normal to have that type of latency? Is something amiss with my proxy configuration (included below)? This is getting really frustrating as I assumed the proxy would do some sort of load balancing, or at least have little to no overhead. #--------------------------------------------------------------------- # Example configuration for a possible web application. See the # full configuration options online. # # http://haproxy.1wt.eu/download/1.4/doc/configuration.txt # #--------------------------------------------------------------------- #--------------------------------------------------------------------- # Global settings #--------------------------------------------------------------------- global # to have these messages end up in /var/log/haproxy.log you will # need to: # # 1) configure syslog to accept network log events. This is done # by adding the '-r' option to the SYSLOGD_OPTIONS in # /etc/sysconfig/syslog # # 2) configure local2 events to go to the /var/log/haproxy.log # file. A line like the following can be added to # /etc/sysconfig/syslog # # local2.* /var/log/haproxy.log # log 127.0.0.1 local2 # chroot /var/lib/haproxy # pidfile /var/run/haproxy.pid maxconn 4096 user haproxy group haproxy daemon #debug #quiet # turn on stats unix socket stats socket /var/lib/haproxy/stats #--------------------------------------------------------------------- # common defaults that all the 'listen' and 'backend' sections will # use if not designated in their block #--------------------------------------------------------------------- defaults mode tcp log global #option tcplog option dontlognull option tcp-smart-accept option tcp-smart-connect #option http-server-close #option forwardfor except 127.0.0.0/8 #option redispatch retries 3 #timeout http-request 10s #timeout queue 1m timeout connect 400 timeout client 500 timeout server 300 #timeout http-keep-alive 10s #timeout check 10s maxconn 2000 listen mysql-cluster 0.0.0.0:3306 mode tcp balance roundrobin option tcpka option httpchk server db01 192.168.15.118:3306 weight 1 inter 1s rise 1 fall 1 server db02 192.168.15.119:3306 weight 1 inter 1s rise 1 fall 1

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• How do I make Nginx redirect all requests for files which do not exist to a single php file?

  - by Richard

  I have the following nginx vhost config: server { listen 80 default_server; access_log /path/to/site/dir/logs/access.log; error_log /path/to/site/dir/logs/error.log; root /path/to/site/dir/webroot; index index.php index.html; try_files $uri /index.php; location ~ \.php$ { if (!-f $request_filename) { return 404; } fastcgi_pass localhost:9000; fastcgi_param SCRIPT_FILENAME /path/to/site/dir/webroot$fastcgi_script_name; include /path/to/nginx/conf/fastcgi_params; } } I want to redirect all requests that don't match files which exist to index.php. This works fine for most URIs at the moment, for example: example.com/asd example.com/asd/123/1.txt Neither of asd or asd/123/1.txt exist so they get redirected to index.php and that works fine. However, if I put in the url example.com/asd.php, it tries to look for asd.php and when it can't find it, it returns 404 instead of sending the request to index.php. Is there a way to get asd.php to be also sent to index.php if asd.php doesn't exist?

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• Wireless disconnects at random after upgrade to Ubuntu 10.4

  - by Daniel Elessedil Kjeserud

  After upgrading my home server from Ubuntu 8.10 to 10.4 my wireless seemingly drops out, even though my IRC client keeps it's connection to the servers, so it looks like the machine just stops taking wireless requests. A ping will give a me this Request timeout for icmp_seq 27 ping: sendto: Host is down After a while the machine just starts responding again, without any interaction from me. When the machine comes back, this is what dmesg gives me [ 18.296288] wlan0: direct probe to AP 00:1b:63:22:a4:5f (try 1) [ 18.296350] wlan0: deauthenticating from 00:1b:63:22:a4:5f by local choice (reason=3) [ 18.296440] wlan0: direct probe to AP 00:1b:63:22:a4:5f (try 1) [ 18.298697] wlan0: direct probe responded [ 18.298706] wlan0: authenticate with AP 00:1b:63:22:a4:5f (try 1) [ 18.306836] wlan0: authenticated [ 18.306886] wlan0: associate with AP 00:1b:63:22:a4:5f (try 1) [ 18.309396] wlan0: RX AssocResp from 00:1b:63:22:a4:5f (capab=0x411 status=0 aid=2) [ 18.309402] wlan0: associated [ 18.310187] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 18.447742] apm: BIOS version 1.2 Flags 0x03 (Driver version 1.16ac) [ 18.447748] apm: overridden by ACPI. [ 19.163282] padlock: VIA PadLock not detected. [ 28.352022] wlan0: no IPv6 routers present kjes@brin:~$ lspci 02:07.0 Network controller: RaLink RT2561/RT61 rev B 802.11g It's on a wireless network with WPA2, the machine worked without any problems on the same wireless network since Ubuntu 8.10 was the most resent version, and there have been no changes to my network recently. Even though the server drops out, everything else on the network keeps working like normal.

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• ssh connection operation timed out using rsync

  - by Mark Molina

  I use rsync to backup my remote server on my local device but when I combine it with a cron job my ssh times out. Just to be clear, the data is stored on a remote server and I want it stored on my local server. The backup request must be sent from my local server to the remote server. The command for backup up the data is working when I just type it in terminal like this: rsync -chavzP --stats USERNAME@IPADDRES: PATH_TO_BACKUP LOCAL_PATH_TO_BACKUP but when I combine it with a cron job like this: 10 11 * * * rsync -chavzP --stats USERNAME@IP_ADDRESS: PATH_TO_BACKUP LOCAL_PATH_TO_BACKUP the ssh connection times out. When the cronjob executes it send a mail to the root user with the output like this: From local.xx.xx.xx Tue Jul 2 11:20:17 2013 X-Original-To: username Delivered-To: [email protected] From: [email protected] (Cron Daemon) To: [email protected] Subject: Cron <username@server> rsync -chavzP --stats USERNAME@IPADDRES: PATH_TO_BACKUP LOCAL_PATH_TO_BACKUP X-Cron-Env: <SHELL=/bin/sh> X-Cron-Env: <PATH=/usr/bin:/bin> X-Cron-Env: <LOGNAME=username> X-Cron-Env: <USER=username> X-Cron-Env: <HOME=/Users/username> Date: Tue, 2 Jul 2013 11:20:17 +0200 (CEST) ssh: connect to host IP_ADDRESS port XX: Operation timed out rsync: connection unexpectedly closed (0 bytes received so far) [receiver] rsync error: unexplained error (code 255) at /SourceCache/rsync/rsync-42/rsync/io.c(452) [receiver=2.6.9] So the rsync command is working when just typed in terminal but not when used by a cronjob. Can anybody explain this?

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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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• 403 Forbidden error on Mac OSX - Apache and nginx

  - by tlianza

  Hi All, There are a million questions like this on Google, but I haven't found a solution to my problem. The default Apache install on my Mac is giving 403 Forbidden errors for everything (default directory, user home directory, virtual server, etc). After sifting through the config files, I figured I'd give nginx a try. Nginx serves files fine from it's home directory, but it won't serve files from a subfolder of my user directory. I've configured a simple virtual host, and requesting index.html returns a 403-forbidden. The error message in nginx's log file is pretty clear - it can't read the file: 2011/01/04 16:13:54 [error] 96440#0: *11 open() "/Users/me/Documents/workspace/mobile/index.html" failed (13: Permission denied), client: 127.0.0.1, server: local.test.com, request: "GET /index.html HTTP/1.1", host: "local.test.com" I've opened up this directory to everyone: drwxrwxrwx 6 me admin 204B Dec 31 20:49 mobile And all the files in it: $ ls -lah mobile/ total 24 drwxrwxrwx 6 me admin 204B Dec 31 20:49 . drwxr-xr-x 71 me me 2.4K Dec 31 20:41 .. -rw-r--r--@ 1 me me 6.0K Jan 2 18:58 .DS_Store -rwxrwxrwx 1 me admin 2.1K Jan 4 14:22 index.html drwxrwxrwx 5 me admin 170B Dec 31 20:45 nbproject drwxrwxrwx 5 me admin 170B Jan 2 18:58 script And yet, I cannot figure out why the nginx process cannot read index.html. It's running as the "nobody" user, but the permissions are set such that anyone can read them.

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• Internal/External Moodle - DNS

  - by Chief17

  Network diagram: I have a moodle (a VLE) setup that I want to be internally and externally accessible. The green route on the diagram below is the route I would like the traffic to take when the user is inside the LAN, and the red route is seemingly what it does take. The website has a domain name (like most websites do). From the User PC, if I ping the domain name, I get the internal IP of the webserver (because of a hosts file entry), if I nslookup the domain name I also get the internal IP of the webserver (because of an A record on my DNS server). Running the same two commands on the webserver gives me the webservers external IP. (going well so far) If I use PHPs gethostbyname() on the moodle website and use domain name as a parameter (getting php/apache to resolve the hostname) it returns the exernal IP of the webserver (good news, DNS seems to be doing what I want it to). All things so far seem to be going well. The only thing that is confusing me and preventing the moodle single sign on from working is the fact that if I get moodle to show my IP address, it says that it is an external one (outside my NATting firewall) when it should show an internal IP. This is the issue, any ideas on how to go about resolving this? Any ideas on tests I can perform (I have also tried a tracert and the request goes directly to the webserver), anything? Thanks all!

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• Is StoreJet Transcend (0x2329) an Advanced Format drive?

  - by Graham Perrin

  I use a 640 GB StoreJet Transcend (0x2329) with ZEVO Community Edition 1.1.1 on OS X 10.8.2. Question Is this drive Advanced Format? Background I submitted a request for technical support to Transcend but the first response was gibberish so I don't expect a reasonable follow-up. Models at http://www.transcend-info.com/Products/CatList.asp?LangNo=0&ModNo=293 are similar but different sizes (not 640 GB). Mine is probably 25M2 (TS640GSJ25M2): Unless I'm missing something, nothing currently in the Transcend support area tells me whether the drive is Advanced Format. From System Information in OS X 10.8.2: StoreJet Transcend: Capacity: 640.14 GB (640,135,028,736 bytes) Removable Media: Yes Detachable Drive: Yes BSD Name: disk3 Product ID: 0x2329 Vendor ID: 0x152d (JMicron Technology Corp.) Version: 0.00 Serial Number: 322549FBA004 Speed: Up to 480 Mb/sec Manufacturer: JMicron History for the ZFS pool shows creation in March 2012 –  macbookpro08-centrim:~ gjp22$ zpool history zhandy | grep create 2012-03-14.17:29:37 zpool create -f -O compression=off -O copies=1 -O casesensitivity=insensitive -O snapdir=visible zhandy /dev/dsk/GPTE_1928482A-7FE4-482D-B692-3EC6B03159BA 2012-06-22.15:51:16 zfs create zhandy/Pocket Time Machine At that time I almost certainly used ZEVO Setup Assistant to create the pool. macbookpro08-centrim:~ gjp22$ zpool get ashift zhandy NAME PROPERTY VALUE SOURCE zhandy ashift 0 default If I discover that the drive is Advanced Format, a different ashift value will be appropriate.

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• Inconsistent DHCP replies with Windows 2008R2 DHCP server

  - by verbalicious

  I've got a Windows 2008R2 standard server running DHCP services. We've noticed that certain clients are receiving inconsistent DHCP replies. We have over 175 Windows workstations in this VLAN that don't seem to have trouble getting DHCP leases. However, PXE-booting clients trying to reach our DHCP server are able to get a lease inconsistently. Additionally, we tried using the "dhcping" tool against our DHCP server and found that roughly two of every three requests time out with "no answer" -- and this holds true when we set the timeout value on dhcping to 20seconds. After a failed attempt, however, we may get a dhcp lease reply immediately with dhcping. This leads me to believe that this issue isn't confined to PXE booting clients, but something more systemic with my LAN layer2 or DHCP. And that possibly my 175 windows clients are experiencing this in some form without my knowledge. We have over 30% of our scope available so the addresses are there. I was unable to find anything in the Windows server "DHCP-Server" log. Of course, my goal is to have my DHCP server reply to every request that it receives on the LAN!

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