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• How do you recreate the System Recovery environment in Windows 7?

  - by Howiecamp

  I'm running Windows 7 Home Premium RTM (64-bit) and I want to take advantage of the system recovery tools (eg the Command Prompt) without using the Windows 7 DVD. My understanding is that this environment (WinRE) should be installed to your HDD by default as part of the Windows 7 installation. However, when I hit F8 on boot and select "Repair", I get: Windows failed to start. A recent hardware or software change might be the cause. To fix the problem... Status: 0xc000000e Info: The boot selection failed because a required device is inaccessible. The "Info" line seems like the smoking gun. My next step was to boot from the Windows 7 DVD, and choose "Repair". It indicated my Recovery Environment wasn't on the Windows 7 boot menu (perfect) and offered to fix it. I said yes and rebooted, however same issue as above. In addition, when I booted in to Windows 7 and I looked at the boot menu options, the recovery/repair option was not there. Only my Windows installation. Finally, I ran the Disk Management tool (diskmgmt.msc) and took a look at the contents of my "System Reserved" partition (which was set to "Active" as normal). It's unclear to me what the contents should look like, however it is my understanding that the WinRE environment gets installed to this partition. (As part of the above troubleshooting I followed http://superuser.com/questions/25728/how-to-fix-windows-7-boot-process which lead to http://www.sevenforums.com/tutorials/668-system-recovery-options.html).

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• How can I get Haproxy to not log local requests?

  - by coneybeare

  I am trying to clean out some of the log clutter from my machines and am starting by removing requests that are generated from the server themselves. I have cache warmers running around the clock and I don't want these polluting the logs. I was able to get apache to stop logging local requests by adding a dontlog for the local IP: SetEnvIf Remote_Addr "RE\.DA\.CT\.ED" dontlog CustomLog "|logger -p local3.info -t http" combined env=!dontlog and now I am looking for something similar to put in a configuration for the Haproxy log. How can I prevent 127.0.0.1 requests from writing to the Haproxy log? UPDATE: 2/15/11 I use the excellent loggly service to pull out logs in the cloud, but I am seeing tons of logs like this: 2011 Feb 15 06:09:42.000 ip-10-251-194-96 http: RE.DA.CT.ED - - [15/Feb/2011:06:09:42 -0500] "HEAD /search/Nevad/predictive/txt HTTP/1.0" 200 - "-" "Wget/1.10.2 (Red Hat modified)" 2011 Feb 15 06:09:42.000 127.0.0.1 haproxy[10390]: 127.0.0.1:58408 [15/Feb/2011:06:09:42] www i-5dd7a331.0 0/0/0/8/8 200 210 - - --NI 0/0/0 0/0 "HEAD /search/Nevad/predictive/txt HTTP/1.1" and I want them gone. This question focuses on how to remove that haproxy log line from writing to the server side log in the first place.

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• KeePass lost password and/or corruption due to Dropbox/KeePassX

  - by GummiV

  I started using Keepass about a month ago to hold my passwords and online accounts info. Everything was stored in a single .kdb file, only protected with a password. I'm using Windows 7. Now Keepass can't open my .kdb file with the error "Invalid/wrong key". I'm fairly confident I have the right password. Altough I might have mixed up a few letters I've tried about two dozen different combinations to minimize that possibility - but can't rule it out though. My guess is however that the .kdb file got corrupted, either due to Dropbox syncing (only using it on one computer though) or because I edited the file using KeePassX on Ubuntu (dual boot on the same computer, accessing a mounted Win7 NTFS partition), or possibly a combination of both. I have tried restoring older versions(even the original one) from Dropbox and trying out all possible passwords without any luck. (which does seem to rule out KeePassX as the culprit, since oldest copies are before I edited the file from Ubuntu) I have tried opening the file with the "Repair KeePass Database file" which always gives the "0xA Invalid/corrupt file structure" (the same error for when a wrong password is typed). I was wondering if there was any way for me to salvage my hard-gathered data. I know generally that brute force cracking is not feasible, but since I can remember probably more than half of the usernames/passwords, any maybe the fact that one of them does come up fairly often (my go-to pass for trivial stuff), that might simplify the brute force process to a doable time frame. Maybe the brute-force thing might incorporate the fact that I know the password length and what characters it's made from. (If we assume corruption, not a password-blackout on my part) I could do some programming if there are any libraries or routines that I could use. Other people seem to have had a similar probem http://forums.dropbox.com/topic.php?id=6199 http://forums.dropbox.com/topic.php?id=9139 http://www.keepassx.org/forum/viewtopic.php?t=1967&f=1 So hopefully this question will become a suitible resource for people when searching the web. Feel free to tell me if you think this should rather be a community wiki.

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• SSL connection hangs as client hello (curl, openssl client, apt-get, wget, everything)

  - by Niklas B

  Hi, I've run into a problem on my Debian VPS (a xen domU) regarding SSL. Namely almost all SSL connections hangs at client hello. For example: # curl -vI https://graph.facebook.com About to connect() to graph.facebook.com port 443 (#0) Trying 66.220.146.48... connected Connected to graph.facebook.com (66.220.146.48) port 443 (#0) successfully set certificate verify locations: CAfile: none CApath: /etc/ssl/certs SSLv3, TLS handshake, Client hello (1): It's the same when using the openssl client. However, some of the SSL traffic works (for example https://www.nordea.se). Server #uname -a Linux server.com 2.6.26-1-xen-amd64 #1 SMP Fri Mar 13 21:39:38 UTC 2009 x86_64 GNU/Linux It does however work on my Dom 0 (the main xen host). Apt-get I can't even run apt-get update with the debian security sources (hangs on reading headers) Open SSL At the begining I thought I had an old openssl client (0.9.8o-4) since I appeared to have a newer on the Dom 0 (0.9.8g-15+lenny8) but doing a manuanl update on the openssl deb didn't help. Open SSL Client This is the full output of when the openssl client hangs: http://pastebin.com/PAjwMap9 Closing thoughts I've Googled the crap out of this, and I'm not getting any further. I've seen problems with curl, apt-get etc. but they are all specific relating to the very application - not general for the system. Any thoughts?

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• WebHost Manager - Apache's VHost isn't matching the DNS entry

  - by Trans

  I've used CPanel's WebHost Manager to create a new host on my VPS. I then used my HOSTS file to point fake.com to the relevant IP address. The problem I'm having now is, Apache isn't recognizing the VHost,or something, as it's just loading the default entry and 404'ing every document I try to GET. Here's the VHost entry NameVirtualHost 0.0.0.209:80 NameVirtualHost 0.0.0.211:80 <VirtualHost 0.0.0.209:80> ServerName fake.com ServerAlias www.fake.com DocumentRoot /home/fakecom/public_html ServerAdmin [email protected] ## User fakecom # Needed for Cpanel::ApacheConf <IfModule mod_suphp.c> suPHP_UserGroup fakecom fakecom </IfModule> <IfModule !mod_disable_suexec.c> SuexecUserGroup fakecom fakecom </IfModule> CustomLog /usr/local/apache/domlogs/fake.com-bytes_log "%{%s}t %I .\n%{%s}t %O ." CustomLog /usr/local/apache/domlogs/fake.com combined Options -ExecCGI -Includes RemoveHandler cgi-script .cgi .pl .plx .ppl .perl ScriptAlias /cgi-bin/ /home/fakecom/public_html/cgi-bin/ </VirtualHost> I've Google'd this profusely and all that's being returned is 'DNS errors. Wait for it to propagate'. That's obviously not my problem, since I'm using HOSTS. What else could be causing this? :/ EDIT: Forgot to mention. http://fake.com/~fakecom/test.html loads just fine. So the fake.com is pointing to the right IP.

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• How to interrupt software raid resync?

  - by Adam5

  I want to interrupt a running resync operation on a debian squeeze software raid. (This is the regular scheduled compare resync. The raid array is still clean in such a case. Do not confuse this with a rebuild after a disk failed and was replaced.) How to stop this scheduled resync operation while it is running? Another raid array is "resync pending", because they all get checked on the same day (sunday night) one after another. I want a complete stop of this sunday night resyncing. [Edit: sudo kill -9 1010 doesn't stop it, 1010 is the PID of the md2_resync process] I would also like to know how I can control the intervals between resyncs and the remainig time till the next one. [Edit2: What I did now was to make the resync go very slow, so it does not disturb anymore: sudo sysctl -w dev.raid.speed_limit_max=1000 taken from http://www.cyberciti.biz/tips/linux-raid-increase-resync-rebuild-speed.html During the night I will set it back to a high value, so the resync can terminate. This workaround is fine for most situations, nonetheless it would be interesting to know if what I asked is possible. For example it does not seem to be possible to grow an array, while it is resyncing or resyncing "pending"]

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• Requests per second slower when using nginx for load balancing

  - by Ed Eliot

  I've set up nginx as a load balancer that reverse proxies requests to 2 Apache servers. I've benchmarked the setup with ab and am getting approx 35 requests per second with requests distributed between the 2 backend servers (not using ip_hash). What is confusing me is that if I query either of the backend servers directly via ab I get around 50 requests per second. I've experimented with a number of different values in ab the most common being 1000 requests with 100 concurrent connections. Any idea why traffic distributed across 2 servers would result in fewer requests per second than hitting either directly? Additional info: I've experimented with worker_processes values of between 1 and 8, worker_connections between 1024 and 8092 and have also tried keepalive 0 and 65. My main conf currently looks like this: user www-data; worker_processes 1; error_log /var/log/nginx/error.log; pid /var/run/nginx.pid; worker_rlimit_nofile 8192; events { worker_connections 2048; use epoll; } http { include /etc/nginx/mime.types; sendfile on; keepalive_timeout 0; tcp_nodelay on; gzip on; gzip_disable "MSIE [1-6]\.(?!.*SV1)"; include /etc/nginx/conf.d/*.conf; include /etc/nginx/sites-enabled/*; } I've got one virtual host (in sites available) that redirects everything under / to 2 backends across a local network.

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• Issues using gmail with google apps and external domain

  - by Jonathan Kelly

  I have recently tried to use gmail through google apps as my main email client, but I'm experiencing a few different problems. I am managing the domain (conjunktiondesign.co.uk) through 123reg.co.uk but it is hosted through fasthosts.co.uk. I transfered the domain to 123reg as fasthosts did not allow me to change the MX records myself. I followed the setup instructions step by step on google apps and changed the MX records as they told me to. My email was now working perfectly but my website was down and I was getting the following error: The dnsserver returned: No DNS records I have a friend that is using the same system as me (ie. Externally hosted domain and google apps mail) and I changed my 123reg details to the same that he had (as his was working perfectly - both email and website). I changed my name servers to point to fasthosts, rather than 123reg and I added an A record called '@' pointing to fasthosts IP address. I also created another A record called 'www' pointing to fasthosts IP address. After I did this, my website worked almost immediately but I have only realised that since changing it my email is now down. I have not received anything since Saturday. I am a web designer and would consider myself fairly tech savvy, but I have no idea about A records, CNAME's and all the things I have been messing about with! What I ultimately need is someone to help me get my email and website working at the same time, rather than one being down when the other is OK. I seem only able to get one or the other working. I have now changed the name servers back to 123reg in an attempt to get my email back as it is more important than my website at this stage. Any help is much appreciated. Thanks.

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• Missing access log for virtual host on Plesk

  - by Cummander Checkov

  For some reason i don't understand, after creating a new virtual host / domain in Plesk a few months back, i cannot seem to find the access log. I noticed this when running /usr/local/psa/admin/sbin/statistics The host in question is being scanned Main HTML page is 'awstats.<hostname_masked>-http.html'. Create/Update database for config "/opt/psa/etc/awstats/awstats.<hostname_masked>.com-https.conf" by AWStats version 6.95 (build 1.943) From data in log file "-"... Phase 1 : First bypass old records, searching new record... Searching new records from beginning of log file... Jumped lines in file: 0 Parsed lines in file: 0 Found 0 dropped records, Found 0 corrupted records, Found 0 old records, Found 0 new qualified records. So basically no access logs have been parsed/found. I then went on to check if i could find the log myself. I looked in /var/www/vhosts/<hostname_masked>.com/statistics/logs but all i find is error_log Does anybody know what is wrong here and perhaps how i could fix this? Note: in the <hostname_masked>.com/conf/ folder i keep a custom vhost.conf file, which however contains only some rewrite conditions plus a directory statement that contains php_admin_flag and php_admin_value settings. None of them are related to logging though.

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• Nginx wont send POST to fastcgi backend, but GET works fine?

  - by xyld

  Not sure why, but it is happy sending a GET to the fastcgi backend (Mercurial hgwebdir in this case), but simply resorts to the filesystem if the request is a POST. Relevant parts of nginx.conf: location / { root /var/www/htdocs/; index index.html; autoindex on; } location /hg { fastcgi_pass unix:/var/run/hg-fastcgi.socket; include fastcgi_params; if ($request_uri ~ ^/hg([^?#]*)) { set $rewritten_uri $1; } limit_except GET { allow all; deny all; auth_basic "hg secured repos"; auth_basic_user_file /var/trac.htpasswd; } fastcgi_param SCRIPT_NAME "/hg"; fastcgi_param PATH_INFO $rewritten_uri; # for authentication fastcgi_param AUTH_USER $remote_user; fastcgi_param REMOTE_USER $remote_user; #fastcgi_pass_header Authorization; #fastcgi_intercept_errors on; } GET's work fine, but POST delivers this error to the error_log: 2010/05/17 14:12:27 [error] 18736#0: *1601 open() "/usr/html/hg/test" failed (2: No such file or directory), client: XX.XX.XX.XX, server: domain.com, request: "POST /hg/test HTTP/1.1", host: "domain.com" What could possibly be the issue? I'm trying to allow read-only access via GET's to the page, but require authorization when using hg push to the same url which sends a POST request.

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• Correct MySQL username/password, but getting Access Denied error when run from script

  - by Nick

  I'm currently trying to run the following command from within a shell script. /usr/bin/mysql -u username -ppassword -h localhost database It works perfectly fine when executed manually, and not from within a script. When I try to execute a script that contains that command, I get the following error: ERROR 1045 (28000) at line 3: Access denied for user 'username'@'localhost' (using password: YES) I literally copied and pasted the working command into the script. Why the error? As a sidenote: the ultimate intent is to run the script with cron. EDIT: Here is a stripped down version of my script that I'm trying to run. You can ignore most of it up until the point where it connects to MySQL around line 19. #!/bin/sh #Run download script to download product data cd /home/dir/Scripts/Linux /bin/sh script1.sh #Run import script to import product data to MySQL cd /home/dir/Mysql /bin/sh script2.sh #Download inventory stats spreadsheet and rename it cd /home/dir /usr/bin/wget http://www.url.com/file1.txt mv file1.txt sheet1.csv #Remove existing export spreadsheet rm /tmp/sheet2.csv #Run MySQL queries in "here document" format /usr/bin/mysql -u username -ppassword -h localhost database << EOF --Drop old inventory stats table truncate table table_name1; --Load new inventory stats into table Load data local infile '/home/dir/sheet1.csv' into table table_name1 fields terminated by ',' optionally enclosed by '"' lines terminated by '\r\n'; --MySQL queries to combine product data and inventory stats here --Export combined data in spreadsheet format group by p.value into outfile '/tmp/sheet2.csv' fields terminated by ',' optionally enclosed by '"' lines terminated by '\r\n'; EOF EDIT 2: After some more testing, the issue is with the << EOF that is at the end of the command. This is there for the "here document". When removed, the command works fine. The problem is that I need << EOF there so that the MySQL queries will run.

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• WRT54GL Tomato Router in Client wireless mode to an iPhone Personal Hotspot

  - by Gordo

  I am trying to connect a router with Tomato firmware to an iPhone 4. The goal is to connect to the Personal Hotspot in Client Wireless mode. This should allow wired and wireless users to connect to the router rather then the iPhone. In theory this should be possible but I am having difficulty. Router Linksys WRT54GL Tomato 1.28.1816 firmware iPhone iPhone 4 iOS 5.1 (9B176) Carrier Rogers Wireless Personal Hotspot works with other devices, wifi/bluetooth/usb iPhone Personal Hotspot settings Mode: B/G Security: WPA or WPA2 Personal Encryption: AES Router IP: 172.20.10.1 Subnet: 172.20.10.0 Min IP: 172.20.10.2 Max IP: 172.20.10.14 maximum number of wireless tethered hosts is 5 I have followed the directions here: http://www.wi-fiplanet.com/tutorials/article.php/3810281 Ensured that the router subnet does not 'collide' with the iPhone subnet. Here is the configuration of the Tomato 'Basic - Network - Wireless' section: http://i.stack.imgur.com/pbmTB.png I have tried several variations of this configuration, but nothing seems to work. NOTE: I have successfully connected to my own wifi network in Wireless Client mode, so I am confident that there are no bad cables or other hardware issues. I would prefer to use Tomato, but DD-WRT maybe my only other option. Thanks!

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• Adding custom service to nagiosgraph

  - by ravloony

  I have successfully added nagiosgraph to our nagios installation. I also added a memory checker plugin, from here : http://blog.vergiss-blackjack.de/2010/04/nagios-plugin-to-check-memory-consumption/. However I can't seem to get the graph of this service to be output by nagiosgraph. The plugin returns a single line like this: 31% (3785 of 11903 MB) used so i added a rule like this to the map file: /output:(\d+)% \((\d+) of (\d+) MB\) used/ and push @s, ['Mem', ['Percentage', 'GUAGE', $1], ['Used', 'GUAGE', $2], ['Total', 'GUAGE', $3] ]; I have also read this : http://www.mail-archive.com/[email protected]/msg36835.html and made sure that process_performance_data=1 in the nagios conf file. So far I have no graph for the Mem service on any host, and no rrd file either. I am unsure how to proceed to get this working. The documentation is rather difficult to follow and I haven't managed yet to understand it enough to do this. Can anyone point me to a tutorial, or some documentation which explains the steps needed to get a service noticed and graphed by nagiosgraph?

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• Blocking HTTPS and P2P Traffic

  - by Genboy

  I have a Debian server running at the gateway level on a LAN. This runs squid for creating block lists of websites - for eg. blocking social networking on the LAN. Also uses iptables. I am able to do a lot of things with squid & iptables, but a few things seem difficult to achieve. 1) If I block facebook through their http url, people can still access https://www.facebook.com because squid doesn't go through https traffic by default. However, if the users set the gateway IP address as proxy on their web browser, then https is also blocked. So I can do one thing - using iptables drop all outgoing 443 traffic, so that people are forced to set proxy on their browser in order to browse any HTTPS traffic. However, is there a better solution for this. 2) As the number of blocked urls increase in squid, I am planning to integrate squidguard. However, the good squidguard lists are not free for commercial use. Anyone knows of a good squidguard list which is free. 3) Block yahoo messenger, gtalk etc. There are so many ports on which these Instant Messenger softwares work. You need to drop lots of outgoing ports in iptables. However, new ports get added, so you have to keep adding them. And even if your list of ports is current, people can still use the web version of gtalk etc. 4) Blocking P2P. Haven't been able to figure out how to do this till now.

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• Connect to Nonencrypted Wireless Network Using Ubuntu Commands

  - by Tim

  I failed to connect to an open i.e. nonencrypted wireless network using Ubuntu command lines. Here is what I did: $ sudo /etc/init.d/NetworkManager stop * Stopping network connection manager NetworkManager [ OK ] $ sudo /sbin/ifconfig wlan0 up $ sudo iwconfig wlan0 essid "Cavalier High-Speed 866-4-CAVTEL" $ sudo dhclient wlan0 There is already a pid file /var/run/dhclient.pid with pid 10812 killed old client process, removed PID file Internet Systems Consortium DHCP Client V3.1.1 Copyright 2004-2008 Internet Systems Consortium. All rights reserved. For info, please visit http://www.isc.org/sw/dhcp/ wmaster0: unknown hardware address type 801 wmaster0: unknown hardware address type 801 Listening on LPF/wlan0/00:0e:9b:cd:4e:18 Sending on LPF/wlan0/00:0e:9b:cd:4e:18 Sending on Socket/fallback DHCPREQUEST of 192.168.1.67 on wlan0 to 255.255.255.255 port 67 DHCPREQUEST of 192.168.1.67 on wlan0 to 255.255.255.255 port 67 DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 7 DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 7 DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 8 DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 12 DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 21 DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 6 No DHCPOFFERS received. Trying recorded lease 192.168.1.67 PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data. --- 192.168.1.1 ping statistics --- 1 packets transmitted, 0 received, +1 errors, 100% packet loss, time 0ms Trying recorded lease 192.168.1.45 PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data. --- 192.168.1.1 ping statistics --- 1 packets transmitted, 0 received, +1 errors, 100% packet loss, time 0ms No working leases in persistent database - sleeping. $ sudo /sbin/iwconfig wlan0 wlan0 IEEE 802.11bg Mode:Managed Frequency:2.422 GHz Access Point: Not-Associated Tx-Power=27 dBm Retry min limit:7 RTS thr:off Fragment thr=2352 B Encryption key:off Power Management:off Link Quality:0 Signal level:0 Noise level:0 Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 I was wondering what the problem is and how I can do it right? Thanks and regards!

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• How do I uncompress vmlinuz to vmlinux?

  - by Lord Loh.

  I have already tried uncompress, gzip, and all other solutions that come up as google results and these have not worked for me. To get just the image search for the GZ signature - 1f 8b 08 00. > od -A d -t x1 vmlinuz | grep '1f 8b 08 00' 0024576 24 26 27 00 ae 21 16 00 1f 8b 08 00 7f 2f 6b 45 so the image begins at 24576+8 => 24584. Then just copy the image from the point and decompress it - > dd if=vmlinuz bs=1 skip=24584 | zcat > vmlinux 1450414+0 records in 1450414+0 records out 1450414 bytes (1.5 MB) copied, 6.78127 s, 214 kB/s Got these instructions verbatim from a forum online: http://www.codeguru.com/forum/showthread.php?t=415186 This process does not work for me and end up giving errors that states file not found 0024576 and all subsequent numbers. How do I proceed extracting vmlinux from vmlinuz? Thank you. EDITED: This is a reverse engineering question. I have no access to the distro to install any RPM or recompile. I start with nothing but vmlinuz.

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• apache2 server running ruby on rails application has go daddy cert that works in chrome/firefox and ie 9 but not ie 8

  - by ryan

  I have a rails application up on a linode ubuntu 11 server, running apache2. I have a cert purchased from godaddy, (where we also bought our domain) and the cert is installed on my server. Part of my virtual host file: ServerName my_site.com ServerAlias www.my_site.com SSLEngine On SSLCertificateFile /path/my_site.com.crt SSLCertificateKeyFile /path/my_site.com.key SSLCertificateChainFile /path/gd_bundle.crt The cert works fine in Chrome, FireFox and IE 9+ but in IE 8- I get this error: There is a problem with this website's security certificate. The security certificate presented by this website was issued for a different website's address. I'm hosting multiple rails apps on this same server (4 right now plus some old php sites that don't need ssl). I have tried googling every possible combination of the error/situation that I could think of but at this point I'm shooting in the dark. The closest I could come up with is that some versions if IE don't support SNI. But that doesn't apply here because I am getting the warning on windows 7 machines running IE 8, and the SNI only seemed to apply to IE 8 if the operating system was windows XP. So why is this cert being accepted by all browsers but giving me a warning in IE 8? Edit: So doing a little more digging and I figured out some more. It turns out this is effecting IE 9 as well. However the problem seems to be that IE is not traversing the ssl chain to get to the right cert. FireFox and Chrome when I go to view certificate show the correct one, but IE is showing one of our other sites certificates. REAL QUESTION HERE: That being the case why is IE not getting the right certificate when others are and how do I fix it?

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• sporadic routing to another website when opening a common url

  - by user226098

  I have a strange problem in our office: Sometimes when opening a url from one of our projects random url in any browser not the right website shows up but some other website. In most of the cases it redirects to google.com with some parameters like https://www.google.de/?gfe_rd=cr&ei=krOOU8_kGcSKswadyYDQBw&gws_rd=ssl or just the ugly google 404 page). But today it remains on the origial url but shows up the the content of http://debug.netdna-cdn.com/. This happens about 1 time a week and for no apparent reason. Even stranger it only occurs on a single pc in the network. It now happens on two different computers in the network. Both use windows 8. The problem cannot be fixed by clearing the browser cache but by rebooting the pc or using ipconfig /flushdns. So I think it has something to do with the dns cache of the machine. But I have no idea what the reason is for this and how i can figure out how to solve it. Any ideas?

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• nginx reverse proxy to apache mod_wsgi doesn't work

  - by user11243

  I'm trying to run a django site with apache mod-wsgi with nginx as the front-end to reverse proxy into apache. In my Apache ports.conf file: NameVirtualHost 192.168.0.1:7000 Listen 192.168.0.1:7000 <VirtualHost 192.168.0.1:7000> DocumentRoot /var/apps/example/ ServerName example.com WSGIDaemonProcess example WSGIProcessGroup example Alias /m/ /var/apps/example/forum/skins/ Alias /upfiles/ /var/apps/example/forum/upfiles/ <Directory /var/apps/example/forum/skins> Order deny,allow Allow from all </Directory> WSGIScriptAlias / /var/apps/example/django.wsgi </VirtualHost> In my nginx config: server { listen 80; server_name example.com; location / { include /usr/local/nginx/conf/proxy.conf; proxy_pass http://192.168.0.1:7000; proxy_redirect default; root /var/apps/example/forum/skins/; } #error_page 404 /404.html; # redirect server error pages to the static page /50x.html error_page 500 502 503 504 /50x.html; location = /50x.html { root html; } } After restarting both apache and nginx, nothing works, example.com simply hangs or serves index.html in my /var/www/ folder. I'd appreciate any advice to point me in the right direction. I've tried several tutorials online to no avail.

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• Nginx + PHP-FPM Too Many Resources

  - by user3393046

  My Server has the following Specs CPU: 6 Cores Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz RAM: 32 GB I have a problem with nginx+php-fpm. They are taking too many resources for an unknown reason. Even if i restart the nginx + php-fpm the start up processes will use many resources. My nginx Config is the following: user nginx; worker_processes auto; error_log /var/log/nginx/error.log warn; pid /var/run/nginx.pid; worker_rlimit_nofile 300000; events { worker_connections 6000; use epoll; } http { include /etc/nginx/mime.types; default_type application/octet-stream; log_format main '$remote_addr - $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_x_forwarded_for"'; access_log /var/log/nginx/access.log main; sendfile on; #tcp_nopush on; keepalive_timeout 65; #gzip on; include /etc/nginx/conf.d/*.conf; } My php-fpm pool config is the following [www] user = nginx group = nginx listen = /var/run/php5-fpm.sock listen.owner = nginx listen.group = nginx listen.allowed_clients = 127.0.0.1 pm = ondemand pm.max_children = 1500; pm.process_idle_timeout = 5; chdir = / security.limit_extensions = .php I'm using on pm.ondemand since my website has to support many concurrent connections at the same time and i was unable to to it with dynamic/static. I guess this isnt the problem because as i said earlier when i restart nginx+php-fpm at the same time, they are taking too much resources without any request. Here is the screenshot with the CPU Usage http://s28.postimg.org/v54q25zod/Untitled.png

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• How can visiting a webpage infect your computer?

  - by Cybis

  My mother's computer recently became infected with some sort of rootkit. It began when she received an email from a close friend asking her to check out some sort of webpage. I never saw it, but my mother said it was just a blog of some sort, nothing interesting. A few days later, my mother signed in on the PayPal homepage. PayPal gave some sort of security notice which stated that to prevent fraud, they needed some additional personal information. Among some of the more normal information (name, address, etc.), they asked for her SSN and bank PIN! She refused to submit that information and complained to PayPal that they shouldn't ask for it. PayPal said they would never ask for such information and that it wasn't their webpage. There was no such "security notice" when she logged in from a different computer, only from hers. It wasn't a phishing attempt or redirection of some sort, IE clearly showed an SSL connection to https://www.paypal.com/ She remembered that strange email and asked her friend about it - the friend never sent it! Obviously, something on her computer was intercepting the PayPal homepage and that email was the only other strange thing to happen recently. She entrusted me to fix everything. I nuked the computer from orbit since it was the only way to be sure (i.e., reformatted her hard drive and did a clean install). That seemed to work fine. But that got me wondering... my mother didn't download and run anything. There were no weird ActiveX controls running (she's not computer illiterate and knows not to install them), and she only uses webmail (i.e., no Outlook vulnerability). When I think webpages, I think content presentation - JavaScript, HTML, and maybe some Flash. How could that possibly install and execute arbitrary software on your computer? It seems kinda weird/stupid that such vulnerabilities exist.

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• How to enable hotlink protection without hardcoding my domain in the Apache config file?

  - by Jeff

  Been surfing around for a solution for a couple days now. How do I enable Apache hotlink protection without hardcoding my domain in the config file so I can port the code to my other domains without having to update the config file every time? This is what I have so far: RewriteCond %{HTTP_REFERER} !^$ RewriteCond %{HTTP_REFERER} !^http://www\.example\.com [NC] RewriteRule \.(gif|ico|jpe|jpeg|jpg|png)$ - [NC,F,L] ... And this is what Apache suggests: SetEnvIf Referer example\.com localreferer <FilesMatch \.(jpg|png|gif)$> Order deny,allow Deny from all Allow from env=localreferer </FilesMatch> ... both of which hardcode the domain in their rules. The closest I came to finding any info that covers this is right here on ServerFault, but the conclusion was that it cannot be done. Based on my research, that appears to be true, but I didn't find any questions or commentary dedicated soley to this question. If anyone's curious, here is the link to the Apache 2 docs that cover this topic. Note that Apache variables (e.g. %{HTTP_REFERER}) can only be used in the RewriteCond text-string and the RewriteRule substitution arguments.

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• Nginx 502 Bad Gateway: It just won't stop

  - by David

  I have the same problem that most people seem to have with Nginx: 502 bad gateway errors. They are intermittent but typically happen more than once per session, which means my users are probably running into it nearly every time they use the app. I've tried adjusting fastcgi_buffers and fastcgi_buffer_size (in both directions) to no avail. I've tried various other things with the configuration file but nothing seems to work. Here's my config (note that I've stripped away most of the things I've tried, since they didn't work and I didn't want to bloat the file with a bunch of un-related directives): server { root /usr/share/nginx/www/; index index.php; # Make site accessible from http://localhost/ server_name localhost; # Pass PHP scripts to PHP-FPM location ~ \.php { include /etc/nginx/fastcgi_params; fastcgi_pass 127.0.0.1:9000; } # Lock the site location / { auth_basic "Administrator Login"; auth_basic_user_file /usr/share/nginx/.htpasswd; } # Hide the password file location ~ /\. { deny all; } client_max_body_size 8M; } I'm running a small Rackspace cloud server, which should be plenty for handling an app with a small user base...

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• Struggling with proper way to setup Permissions on Linux/Apache Web Server

  - by Dr. DOT

  Your expert experience and assistance is great, greatly appreciated here. I have been running a LAMP server for a long time, yet I still struggle with the best way to set file & directory permissions for FTP and WWW protocol activity. My Control panel is WHM/cPanel (not that it makes a difference), and out-of-the box: files are owned by the user account setup in WHM (eg, "abc") files have a group setting of "abc" as well file permissions are created with 644 directories are owned by "abc" directories have a group setting of "abc" directories permissions are created with 0755 Again, these are the default permission settings. Now everything is fine with FTP activity, but please advise me if any of these file/directory settings create issues, especially with security. Here's where my struggle comes into play. I have PHP apps that allow a visitor to create, edit, rename, delete, etc. sub-directories and files in certain selected directories. PHP runs as "nobody" on my server. So in order to get my PHP/Web apps to work, I have had to: chown nobody * chgrp nobody * chmod 0777 * to everything in these certain & selected sub-directories. I know this is probably a huge security whole (so don't ask me for any links :) but how should I set all the permissions to allow my FTP user to do his thing while allowing the PHP apps to do their thing will also "minimizing" any security risks and exposures? I know that big CMS systems like Drupal, Joomla, WordPress and so on, handle this. Thanks ahead of time for reading through this and offering your expert advice!

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• Mechanism behind user forwarding in ScriptAliasMatch

  - by jolivier

  I am following this tutorial to setup gitolite and at some point the following ScriptAliasMatch is used: ScriptAliasMatch \ "(?x)^/(.*/(HEAD | \ info/refs | \ objects/(info/[^/]+ | \ [0-9a-f]{2}/[0-9a-f]{38} | \ pack/pack-[0-9a-f]{40}\.(pack|idx)) | \ git-(upload|receive)-pack))$" \ /var/www/bin/gitolite-suexec-wrapper.sh/$1 And the target script starts with USER=$1 So I am guessing this is used to forward the user name from apache to the suexec script (which indeed requires it). But I cannot see how this is done. The ScriptAliasMatch documentation makes me think that the /$1 will be replaced by the first matching group of the regexp before it. For me it captures from (?x)^/(.* to ))$ so there is nothing about a user here. My underlying problem is that USER is empty in my script so I get no authorizations in gitolite. I give my username to apache via a basic authentication: <Location /> # Crowd auth AuthType Basic AuthName "Git repositories" ... Require valid-user </Location> defined just under the previous ScriptAliasMatch. So I am really wondering how this is supposed to work and what part of the mechanism I missed so that I don't retrieve the user in my script.

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