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• IPtables AWS EC2 NAT/Reverse NAT - For Reverse Proxy style setup but with IPtables

  - by Mark

  I was thinking initially needing to do a reverse proxy or something so I could get some SSL/TLS traffic look like it is being terminated at a server and IP address in the AWS cloud, and then that traffic is forwarded onto our actual web servers that aren't in the cloud... I've not done much iptables pre and post routing before Dnat or Snat which I know are the things I need or a combination of the things I need in order achieve what i'm trying. Things to note:- Client/User - Must not be able to see backend IP address and only see the IP address of the cloud box https (TLS/SSL) - connection shouldn't be terminated at the cloud box, it should act like a router almost EC2 instance - Has only one network interface available to play with... this is thus an (internet <- internet) type of routing going on. EC2 instance IP address is already more or less behind a NAT that I have no control over, for example... Public ip address could be 46.1.1.1 but instance IP will be 10.1.1.1. Connections from client will go to 46.1.1.1 which will end up at the instance and on interface 10.1.1.1. The connection from the client then needs to be forwarded (DNAT) onto the backend web servers which are back out on the internet (SNAT). Possibly a part of the problem could be that the SNAT will need to be set to the external interface of the instance and I wonder if this makes it harder for IPtables to track the connection? So looking to basically, have it look as though connections are terminating at this server and its IP address. Whereas all that's really happening is the https request and connection is being forwarded straight onto another internet facing web server. How possible does that sound?

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• Apache reverse-proxy intermittent error 113 - No route to host

  - by BonkaBonka

  I've got an Apache 2.0.52 server on CentOS 4 that front-ends a couple of App servers (mix of Jetty and Tomcat). Apache has a handful of virtual hosts configured like this: <VirtualHost www1.example.com:443> ServerName www1.example.com DocumentRoot "/mnt/app_web/html" SSLEngine on SSLCipherSuite ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP SSLCertificateFile /etc/httpd/conf/ssl.crt/server.crt SSLCertificateChainFile /etc/httpd/conf/ssl.crt/chain.crt SSLCertificateKeyFile /etc/httpd/conf/ssl.key/server.key SetEnvIf User-Agent ".*MSIE.*" nokeepalive ssl-unclean-shutdown downgrade-1.0 force-response-1.0 RewriteEngine on RewriteRule ^/app1/(.*)$ http://app1.example.com:8080/app1/$1 [P,L] RewriteRule ^/app2/(.*)$ http://app2.example.com:8080/app2/$1 [P,L] </VirtualHost> However, I'm getting the following errors in the logs intermittently: [Fri Dec 04 07:19:41 2009] [error] (113)No route to host: proxy: HTTP: attempt to connect to 10.0.0.1:8080 (app1.example.com) failed I initially tried turning off IPv6, and that seemed to largely cure it, but I still have sporadic bursts of these messages. Additionally, we're running memcache on same front-end and during the times when I'm getting those messages in Apache's log, the following command doesn't work: echo stats | nc 127.0.0.1 11211 No messages are printed, but neither are the stats printed. I am completely lost as to how to proceed with troubleshooting this. =(

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• Nginx case-insensitive reverse proxy rewrites

  - by BrianM

  I'm looking to setup an nginx reverse proxy to make some upcoming server moves and load balanced implementations much easier within our apps. Since our servers are all IIS case sensitivity hasn't been an issue, but now with nginx it's becoming one for me. I am simply looking to do a rewrite regardless of case. Infrastructure notes: All backend servers are IIS Most services are WCF services I am trying to simplify the URLs so I can move services around as we continue to build out I can't set my location to case insensitive due to the following error: nginx: [emerg] "proxy_pass" cannot have URI part in location given by regular expression, or inside named location, or inside "if" statement, or inside "limit_except" block in /etc/nginx/sites-enabled/test.conf:101 The main part of my conf file where I am trying to handle the rewrite is as follows location /svc_test { proxy_set_header x-real-ip $remote_addr; proxy_set_header x-forwarded-for $proxy_add_x_forwarded_for; proxy_set_header host $http_host; proxy_pass http://backend/serviceSite/WFCService.svc; } location ~* /test { rewrite ^/(.*)/$ /svc_test/$1 last; } It's the /test location that I can't get figured out. If I call http://nginxserver/svc_test/help I get the WCF help page to display correctly and I can make all available REST calls. This HAS to be a boneheaded regex issue on my part, but I have tried several variations and all I can get are 404 or 500 errors from nginx. This is NOT rocket science so can someone point me in the right direction so I can look like an idiot and just move on?

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• How to remove request blocking on apache reverse proxy after failure of backend before asking backen

  - by matnagel

  I am working on an apache2 reverse proxy vhost. When the server behind apache is down, the first request to apache shows the error page of course. But at subsequent requests it seems apache delays for some time before asking the backend server again. During all this time (which is short but in development I don't want a delay at all) only the apache error page is shown to the browser, although the backend server is already up. Where is this setting in apache, what is this behaviour, and how can I set the delay time to zero? Edit: I am not trying to change the timeout for a single request. I want to change the blocking time. It is my experience that apache blocks further requests for a certain time before asking a backend server again that has failed once. Edit2: This is what apache delivers: Service Temporarily Unavailable The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later. Apache/2.2.8 (Ubuntu) PHP/5.2.4-2ubuntu5.7 with Suhosin-Patch proxy_html/3.0.0 Server at localhost Port 80 After hitting Ctrl-R in firefox for 60 seconds the page finally appears.

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• How To Remove Bottleneck with Squid Caching Proxy

  - by Volomike

  I'm more of a LAMP web developer trying to help the sysop. When I joined a project, I inherited some old PHP spaghetti code. Some of that code is that it goes out to a third-party website (let's call it thirdparty.com) and pulls down content with an HTTP-GET request. Unfortunately, the way the code is designed, it needs to do this several times a minute. When we looked at the bottlenecks on the server with 'netstat -a', we saw that connections to thirdparty.com were constantly running when this content would be plenty fine to be gathered once a day. What I need to know is if the Squid Proxy Caching Server is the solution we need? I'm guessing that this might let us have it pretend to be thirdparty.com on the network. If the web server needs to query thirdparty.com, it hits Squid instead. Squid can then determine whether it needs to supply content from cache or if it needs to go to thirdparty.com for fresh content. Is this the solution we need? And second, is this easily configured and only to cache thirdparty.com requests?

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• Apache2 with lighttpd as proxy

  - by andrzejp

  Hi, I am using apache2 as web server. I would like to help him lighttpd as a proxy for static content. Unfortunately I can not well set up lighttpd and apache2. (OS: Debian) Important things from lighttpd.config: server.modules = ( "mod_access", "mod_alias", "mod_accesslog", "mod_proxy", "mod_status", ) server.document-root = "/www/" server.port = 82 server.bind = "localhost" $HTTP["remoteip"] =~ "127.0.0.1" { alias.url += ( "/doc/" => "/usr/share/doc/", "/images/" => "/usr/share/images/" ) $HTTP["url"] =~ "^/doc/|^/images/" { dir-listing.activate = "enable" } } I would like to use lighttpd in only one site operating as a virtual directory on apache2. Configuration of this virtual directory: ProxyRequests Off ProxyPreserveHost On ProxyPass /images http://0.0.0.0:82/ ProxyPass /imagehosting http://0.0.0.0:82/ ProxyPass /pictures http://0.0.0.0:82/ ProxyPassReverse / http://0.0.0.0:82/ ServerName MY_VALUES ServerAlias www.MY_VALUES UseCanonicalName Off DocumentRoot /www/MYAPP/forum <Directory "/www/MYAPP/forum"> DirectoryIndex index.htm index.php AllowOverride None ... As you can see (or not;)) my service is physically located at the path: / www / myapp / forum and I would like to support lighttpd dealt with folders: / www / myapp / forum / images / www / myapp / forum / imagehosting / www / myapp / forum / pictures and left the rest (PHP scripts) for apache After running lighttpd and apache2 working party, but did not show up any images of these locations. What is wrong?

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• Nginx proxy with Redmine SVN authentication.

  - by Omegaice

  I am attempting to setup a system where I have an nginx server running as a reverse proxy for multiple websites that I want to run. To separate the websites I have created a Linux container which contains each site to allow me to reduce conflicts in database usage etc. I am currently trying to get my main site working and have nginx with passenger setup and connecting to redmine and I have an Apache install specifically setup for serving the SVN over HTTP and am attempting to use the redmine authentication with that. I have set everything up as described in the redmine howtos, but when I check a project out from the SVN it always works even if the project is private and whenever I try and commit to the repositories it fails saying "Could not open the requested SVN filesystem", the Apache error log related to that event is "(20014)Internal error: Can't open file '/srv/rcs/svn/error/format': No such file or directory". If I take out the redmine authentication I can checkout and check-in repositories fine but there is no authentication. Does anyone have any ideas? Edit I tried to solve this problem another way by attempting to have the authentication work by LDAP, I managed to get it so that my user could log into the redmine website but as soon as I tried to check anything out it said that access was forbidden to the repository.

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• Web filtering (Proxy or DNS) with option for users to ignore the block

  - by Jon Rhoades

  We are struggling with our users visiting infected or "attack" sites and Phising in general. Most of our machines are protected by an Enterprise anti virus and monitoring solution (McAffe ePO) and we try to get people to use Firefox... But no AV is perfect and we have to endure personal machines as well (albeit on their own 'Plague' VLANs) and would like to do something about Phishing as our users seem intent on disclosing their passwords to the world... To complicate matters we don't want to implement a block for many many reasons instead we would like to implement something akin to Firefox's "Reported Scam/Phish/Attack Site" - "Get me out of here" or crucially "Let me in anyway", giving the user a choice to still infect themselves if they feel like it (or look at a site incorrectly blacklisted). The reason we can't just use Firefox is we have a core enterprise App only certified on IE6&7 - thank you Oracle. Is it possible to implement this type of advisory filtering either using a proxy (in our case Squid) or DNS? http://serverfault.com/questions/15801/what-free-options-are-available-for-web-content-filtering http://serverfault.com/questions/47520/open-source-filtering-of-https-traffic Were a good start, but they don't address the advisory aspect of the filtering.

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• SQUID proxy - open FTP (and other ports)

  - by gaffcz

  elpeHow can I open other ports than HTTP and HTTPS using SQUID proxy? I have last version of squid running on Fedora 10 but I'm not able to open FTP port. part of my squid.conf: acl manager proto cache_object acl localhost src 127.0.0.1/32 ::1 acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1 acl ftp proto FTP acl ftp_port port 21 always_direct allow FTP acl SSL_ports port 443 20 21 22 acl Safe_ports port 20 # ftp acl Safe_ports port 21 # ftp acl Safe_ports port 22 # sftp acl Safe_ports port 80 # http acl Safe_ports port 280 # http-mgmt acl Safe_ports port 443 # https acl Safe_ports port 1025-65535 # uregistred ports acl CONNECT method CONNECT http_access allow manager localhost http_access deny manager # USER privilegies (encoded in file passwd) auth_param basic program /usr/lib/squid/ncsa_auth /etc/squid/passwd acl AUTHUSERS proxy_auth REQUIRED # BLACKLIST (in file denied.conf) acl denied_domains dstdomain "/etc/squid/DNDdomains.conf" acl denied_regex url_regex "/etc/squid/DNDregex.conf" http_access deny denied_regex http_access deny denied_domains http_access allow AUTHUSERS http_access deny !Safe_ports http_access deny CONNECT !SSL_ports http_access allow ftp_port CONNECT http_access allow ftp http_access allow localhost http_access deny all #http_reply_access allow all #http_access allow all http_port 3128 hierarchy_stoplist cgi-bin ? cache_dir ufs /var/spool/squid 10000 16 256 coredump_dir /var/spool/squid refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern . 0 20% 4320 I've tried to add: acl ftp proto FTP / acl ftp_port port 21 http_access allow ftp add/remove ports 20,21 from SSL_PORTS list set the iptables But nothing helped. It is even possible to use a new version of squid for FTP transfer?

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• Pros and Cons of a proxy/gateway server

  - by Curtis

  I'm working with a web app that uses two machines, a BSD server and a Windows 2000 server. When someone goes to our website, they are connected to the BSD server which, using Apache's proxy module, relays the requests & responses between them and the web server on the Windows server. The idea (designed and deployed about 9 years ago) was that it was more secure to have the BSD server as what outside people connected to than the Windows server running the web app. The BSD server is a bare bones install with all unnecessary services & applications removed. These servers are about to be replaced and the big question is, is a cut-down, barebones server necessary for security in this setup. From my research online I don’t see anyone else running a setup like this (I don't see anyone questioning it at least.) If they have a server between the user and the web app server(s), it is caching, compressing, and/or load balancing. Is there anything I’m overlooking by letting people connect directly from the internet ** to a Windows 2008 R2 server that’s running the web application? ** there’s a good hardware firewall between the internet with only minimal ports open Thank you.

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• [tcpdump] Proxy delegate refusing connexion ?

  - by simtris

  Hi guys, I'm a little disapointed ! My aim was to build a VERY simple smtp proxy under debian to handle mail from a port (51234) and forward it to the standard 25 port. I compile and install a "delegate" witch can handle easily that. It's working very well like that : delegated SERVER="smtp://anotherSmtpServer:25" -P51234 The strange thing is, it's working on my virtual test machine and on the dedicated server in local but I can't manage to use it trought internet. I test it like that. telnet [mySrv] 51234 Of course, no firewal, no deny host, no ined/xined, the service delegated is listening on the right port ... 2 clues : The port is answering trought internet with nmap as "51234/tcp open tcpwrapped" have a look at the tcpdump following : 22:50:54.864398 IP [myIp].1699 [mySrv].51234: S 2486749330:2486749330(0) win 65535 22:50:54.864449 IP [mySrv].51234 [myIp].1699: S 2486963525:2486963525(0) ack 2486749331 win 5840 22:50:54.948169 IP [myIp].1699 [mySrv].51234: . ack 1 win 64240 22:50:54.965134 IP [mySrv].43554 [myIp].auth: S 2485396968:2485396968(0) win 5840 22:50:55.243128 IP [myIp] [mySrv]: ICMP [myIp] tcp port auth unreachable, length 68 22:50:55.249646 IP [mySrv].51234 [myIp].1699: F 1:1(0) ack 1 win 46 22:50:55.309853 IP [myIp].1699 [mySrv].51234: . ack 2 win 64240 22:50:55.310126 IP [myIp].1699 [mySrv].51234: F 1:1(0) ack 2 win 64240 22:50:55.310137 IP [mySrv].51234 [myIp].1699: . ack 2 win 46 The part "auth" seems suspect to me but didn't ring a bell. I could certaily do with some help. Thx a lot !

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• Setup proxy with Apache 2.4 on Mac 10.8

  - by Aptos

  I have 1 application (Java) that running on my local machine (localhost:9000). I want to setup Apache as a front end proxy thus I used following configuration in the httpd.conf: <Directory /> #Options FollowSymLinks Options Indexes FollowSymLinks Includes ExecCGI AllowOverride All Order deny,allow Allow from all </Directory> Listen 57173 LoadModule proxy_module modules/mod_proxy.so <VirtualHost *:9999> ProxyPreserveHost On ServerName project.play ProxyPass / http://127.0.0.1:9000/Login ProxyPassReverse / http://127.0.0.1:9000/Login LogLevel debug </VirtualHost> ServerName localhost:57173 I change my vim /private/etc/hosts to: ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost 127.0.0.1:9999 project.play and use dscacheutil -flushcache. The problem is that I can only access to localhost:57173, when I tried accessing http://project.play:9999, Chrome returns "Oops! Google Chrome could not find project.play:9999". Can somebody show me where I were wrong? Thank you very much P/S: When accessing localhost:9999 it returns The server made a boo boo.

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• How to test nginx proxy timeouts

  - by mkorszun

  Target: I would like to test all Nginx proxy timeout parameters in very simple scenario. My first approach was to create really simple HTTP server and put some timeouts: Between listen and accept to test proxy_connect_timeout Between accept and read to test proxy_send_timeout Between read and send to test proxy_read_timeout Test: 1) Server code (python): import socket import os import time import threading def http_resp(conn): conn.send("HTTP/1.1 200 OK\r\n") conn.send("Content-Length: 0\r\n") conn.send("Content-Type: text/xml\r\n\r\n\r\n") def do(conn, addr): print 'Connected by', addr print 'Sleeping before reading data...' time.sleep(0) # Set to test proxy_send_timeout data = conn.recv(1024) print 'Sleeping before sending data...' time.sleep(0) # Set to test proxy_read_timeout http_resp(conn) print 'End of data stream, closing connection' conn.close() def main(): s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) s.bind(('', int(os.environ['PORT']))) s.listen(1) print 'Sleeping before accept...' time.sleep(130) # Set to test proxy_connect_timeout while 1: conn, addr = s.accept() t = threading.Thread(target=do, args=(conn, addr)) t.start() if __name__ == "__main__": main() 2) Nginx configuration: I have extended Nginx default configuration by setting explicitly proxy_connect_timeout and adding proxy_pass pointing to my local HTTP server: location / { proxy_pass http://localhost:8888; proxy_connect_timeout 200; } 3) Observation: proxy_connect_timeout - Even though setting it to 200s and sleeping only 130s between listen and accept Nginx returns 504 after ~60s which might be because of the default proxy_read_timeout value. I do not understand how proxy_read_timeout could affect connection at so early stage (before accept). I would expect 200 here. Please explain! proxy_send_timeout - I am not sure if my approach to test proxy_send_timeout is correct - i think i still do not understand this parameter correctly. After all, delay between accept and read does not force proxy_send_timeout. proxy_read_timeout - it seems to be pretty straightforward. Setting delay between read and write does the job. So I guess my assumptions are wrong and probably I do not understand proxy_connect and proxy_send timeouts properly. Can some explain them to me using above test if possible (or modifying if required).

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• Proxy auto-config dnsResolve doesn't seem to resolve subdomains

  - by HorusKol

  We're running on a Windows domain, and have a DNS to control computer names on our intranet. The following PAC works great for basic hostnames on our intranet - but we're setting up some subdomain-like names (example, redesign.buildbox), and it isn't resolving these. These subdomains are resolvable through other means (such as nslookup). Other than checking to see if the host has ".buildbox" or other domain, is there a way to make it work? Maybe I could try appending the Windows domain to host (can you concatenate strings in a PAC)? function FindProxyForURL(url, host) { // If IP address is internal or hostname resolves to internal IP, send direct. var resolved_ip = dnsResolve(host); if (isInNet(resolved_ip, "129.2.2.0", "255.255.255.128")) return "DIRECT"; if (isInNet(resolved_ip, "10.1.1.0", "255.255.255.0")) return "DIRECT"; if (isInNet(resolved_ip, "150.1.2.0", "255.255.255.248")) return "DIRECT"; // All other traffic uses below proxies, in fail-over order. return "PROXY 192.111.222.111:8080; DIRECT"; }

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• Nginx proxy to IIS Connection Timeout

  - by MitMaro

  I am having an issue with random timeouts with a Nginx proxy connecting to an IIS machine. I have been watching a packet capture between the two servers and it seems that the IIS machine is receiving a SYN packet but is not responding with what I think should be an ACK response. Before the timeout occurs there seems to be a slower response from the IIS server. There is no unusual memory or processor usage on the IIS or Nginx machine. Some information on the servers and setup: Nginx Machine: Ubuntu 10.04 64bit Nginx 0.7.65 Amazon EC2 Windows Machine: Windows Server 2008 IIS 7 ASP.net Application in Integrated Mode Nginx Error: 2011/01/10 17:57:40 [error] 8297#0: *30 connect() failed (110: Connection timed out) while connecting to upstream, client: 209.***.***.***, server: secure.example.com, request: "GET /a/path/deliver.aspx HTTP/1.1", upstream: "http://***.***.***.****:****//another/path/deliver.aspx", host: "secure.example.com" WireShark Packets 6521.449528 10.***.***.*** -> 174.***.***.*** TCP 38695 > us-cli [SYN] Seq=0 Win=5840 Len=0 MSS=1460 TSV=477422103 TSER=0 WS=7 6524.443239 10.***.***.*** -> 174.***.***.*** TCP 38695 > us-cli [SYN] Seq=0 Win=5840 Len=0 MSS=1460 TSV=477422403 TSER=0 WS=7 6530.443241 10.***.***.*** -> 174.***.***.*** TCP 38695 > us-cli [SYN] Seq=0 Win=5840 Len=0 MSS=1460 TSV=477423003 TSER=0 WS=7

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• Nginx, as reverse proxy, could not proxy_pass to a domain pointing to the local JBOSS

  - by larryzhao

  My environment is Ubuntu 12.04, Nginx 1.20, and Torquebox 2.0.3 which is actually JBoss AS 7. I have two app deployed on Torquebox, it listens to 8080 and have different hostnames, app1.mydomain.com and app2.mydomain.com. I added 127.0.0.1 app1.mydomain.com and 127.0.0.1 app2.mydomain.com in /etc/hosts then I curl app1.mydomain.com:8080 and curl app2.mydomain.com:8080 both have correct return. Then I go to my nginx. I would like nginx to pass the visit to www.app1.com to app1.mydomain.com:8080, so I have the following configuration: # primary server - proxypass to torquebox server { listen 80; server_name www.app1.com; access_log off; error_log off; # proxy to Torquebox location / { proxy_pass http://app1.mydomain:8080/; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_max_temp_file_size 0; client_max_body_size 10m; client_body_buffer_size 128k; proxy_connect_timeout 90; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; proxy_buffers 4 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; } } But it doesn't work. curl www.app1.com returns nothing. And if I visit www.app1.com in Safari, the http return code is 404. I don't know why, need help.

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• Nginx + PHPBB3 reverse proxy images problem

  - by siberiano

  Hello all I have a problem with my Nginx Frontend + Apache2 backend + PHPBB3 software. It doesn't load the CSS and the images neither. I get constant errors like these: 2010/04/14 16:57:25 [error] 13365#0: *69 open() "/var/www/foo/styles/styles/coffee_time/theme/large.css" failed (2: No such file or directory), client: 83.44.175.237, server: www.foo.com, request: "GET /styles/coffee_time/theme/large.css HTTP/1.1", host: "www.foo.com", referrer: "http://www.foo.com/viewforum.php?f=43" This is my config of the site: server { listen 80; server_name www.foo.com; access_log /var/log/nginx/foo.access.log; # serve static files directly location ~* ^.+.(jpg|jpeg|gif|css|png|js|ico)$ { access_log off; expires 30d; root /var/www/trasteando/; } location / { root /var/www/foo/; index /var/www/foo/index.php; } # proxy the PHP scripts to predefined upstream .apache. # location ~ .php$ { proxy_pass http://apache; } location /styles/ { root /var/www/foo/styles/; }

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• proxy pass domain FROM default apache port 80 TO nginx on another port

  - by user10580

  Im still learning server things so hope the title is descriptive enough. Basically i have sub.domain.com that i want to run on nginx at port 8090. I want to leave apache alone and have it catch all default traffic at port 80. so i am trying something with a virtual name host to proxy pass to sub.domain.com:8090, nothing working yet and go no idea what the right syntax could be. any ideas? most of what i found was to pass TO apache FROM nginx, but i want to the do the opposite. LoadModule proxy_module modules/mod_proxy.so LoadModule proxy_http_module modules/mod_proxy_http.so <VirtualHost sub.domain.com:80> ProxyPreserveHost On ProxyRequests Off ServerName sub.domain.com DocumentRoot /home/app/public ServerAlias sub.domain.com proxyPass / http://appname:8090/ (also tried localhost and sub.domain.com) ProxyPassReverse / http://appname:8090/ </VirtualHost> when i do this i get [warn] module proxy_module is already loaded, skippin [warn] module proxy_http_module is already loaded, skipping [error] (EAI 2)Name or service not known: Could not resolve host name sub.domain.com -- ignoring! and yes, the app is working (i have it running on port 80 with another subdomain) and it works at sub.domain.com:8090

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• Need to set up a proxy on Linksys E3200 to filter home internet

  - by Justin Amberson

  the fact that I have a Linksys E3200 may not be important. I can configure the router through the web interface, but I don't know the things I will be toggling are called. I already do simple port forwarding to access applications on my Mac remotely. So router admin is not something I technically need explained. I'm looking to running a proxy on my home computer, that filters all HTTP traffic that goes through my router. So if my daughter is on her iPad and accesses Safari, my Mac will be the judge of the validity of the request. I need something like NetNanny I guess, but local. Actually, anything that can just filter all port 80 traffic that runs locally, but maybe validates with a password? I truly truly hope this question falls within the bounds of Serverfault. I'm not a total internet newb but I'm at a loss for what to Google. If possible answer this question: Is there a webapp that can listen on port 80, and validate requests to port 80 with a password? If so, can I forward all traffic on port 80 to my Mac, to be re-routed to the user? Is this the same as a VPN? Thank you for your help. Justin

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• nginx reverse proxy slows down my throughput by half

  - by Isaac A Mosquera

  I'm currently using nginx to proxy back to gunicorn with 8 workers. I'm using an amazon extra large instance with 4 virtual cores. When I connect to gunicorn directly I get about 10K requests/sec. When I serve a static file from nginx I get about 25 requests/sec. But when I place gunicorn behind nginx on the same physical server I get about 5K requests/sec. I understand there will be some latency from nginx, but I think there might be a problem since it's a 50% drops. Anybody heard of something similar? any help would be great! Here is the relevant nginx conf: worker_processes 4; worker_rlimit_nofile 30000; events { worker_connections 5120; } http { sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65; types_hash_max_size 2048; } sites-enabled/default: upstream backend { server 127.0.0.1:8000; } server { server_name api.domain.com ; location / { proxy_pass http://backend; proxy_buffering off; } }

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• Implementing an Interceptor Using NHibernate’s Built In Dynamic Proxy Generator

  - by Ricardo Peres

  NHibernate 3.2 came with an included proxy generator, which means there is no longer the need – or the possibility, for that matter – to choose Castle DynamicProxy, LinFu or Spring. This is actually a good thing, because it means one less assembly to deploy. Apparently, this generator was based, at least partially, on LinFu. As there are not many tutorials out there demonstrating it’s usage, here’s one, for demonstrating one of the most requested features: implementing INotifyPropertyChanged. This interceptor, of course, will still feature all of NHibernate’s functionalities that you are used to, such as lazy loading, and such. We will start by implementing an NHibernate interceptor, by inheriting from the base class NHibernate.EmptyInterceptor. This class does not do anything by itself, but it allows us to plug in behavior by overriding some of its methods, in this case, Instantiate: 1: public class NotifyPropertyChangedInterceptor : EmptyInterceptor 2: { 3: private ISession session = null; 4:  5: private static readonly ProxyFactory factory = new ProxyFactory(); 6:  7: public override void SetSession(ISession session) 8: { 9: this.session = session; 10: base.SetSession(session); 11: } 12:  13: public override Object Instantiate(String clazz, EntityMode entityMode, Object id) 14: { 15: Type entityType = Type.GetType(clazz); 16: IProxy proxy = factory.CreateProxy(entityType, new _NotifyPropertyChangedInterceptor(), typeof(INotifyPropertyChanged)) as IProxy; 17: 18: _NotifyPropertyChangedInterceptor interceptor = proxy.Interceptor as _NotifyPropertyChangedInterceptor; 19: interceptor.Proxy = this.session.SessionFactory.GetClassMetadata(entityType).Instantiate(id, entityMode); 20:  21: this.session.SessionFactory.GetClassMetadata(entityType).SetIdentifier(proxy, id, entityMode); 22:  23: return (proxy); 24: } 25: } Then we need a class that implements the NHibernate dynamic proxy behavior, let’s place it inside our interceptor, because it will only need to be used there: 1: class _NotifyPropertyChangedInterceptor : NHibernate.Proxy.DynamicProxy.IInterceptor 2: { 3: private PropertyChangedEventHandler changed = delegate { }; 4:  5: public Object Proxy 6: { 7: get; 8: set;} 9:  10: #region IInterceptor Members 11:  12: public Object Intercept(InvocationInfo info) 13: { 14: Boolean isSetter = info.TargetMethod.Name.StartsWith("set_") == true; 15: Object result = null; 16:  17: if (info.TargetMethod.Name == "add_PropertyChanged") 18: { 19: PropertyChangedEventHandler propertyChangedEventHandler = info.Arguments[0] as PropertyChangedEventHandler; 20: this.changed += propertyChangedEventHandler; 21: } 22: else if (info.TargetMethod.Name == "remove_PropertyChanged") 23: { 24: PropertyChangedEventHandler propertyChangedEventHandler = info.Arguments[0] as PropertyChangedEventHandler; 25: this.changed -= propertyChangedEventHandler; 26: } 27: else 28: { 29: result = info.TargetMethod.Invoke(this.Proxy, info.Arguments); 30: } 31:  32: if (isSetter == true) 33: { 34: String propertyName = info.TargetMethod.Name.Substring("set_".Length); 35: this.changed(this.Proxy, new PropertyChangedEventArgs(propertyName)); 36: } 37:  38: return (result); 39: } 40:  41: #endregion 42: } What this does for every interceptable method (those who are either virtual or from the INotifyPropertyChanged) is: For methods that came from the INotifyPropertyChanged interface, add_PropertyChanged and remove_PropertyChanged (yes, events are methods ), we add an implementation that adds or removes the event handlers to the delegate which we declared as changed; For all the others, we direct them to the place where they are actually implemented, which is the Proxy field; If the call is setting a property, it fires afterwards the PropertyChanged event. In order to use this, we need to add the interceptor to the Configuration before building the ISessionFactory: 1: using (ISessionFactory factory = cfg.SetInterceptor(new NotifyPropertyChangedInterceptor()).BuildSessionFactory()) 2: { 3: using (ISession session = factory.OpenSession()) 4: using (ITransaction tx = session.BeginTransaction()) 5: { 6: Customer customer = session.Get<Customer>(100); //some id 7: INotifyPropertyChanged inpc = customer as INotifyPropertyChanged; 8: inpc.PropertyChanged += delegate(Object sender, PropertyChangedEventArgs e) 9: { 10: //fired when a property changes 11: }; 12: customer.Address = "some other address"; //will raise PropertyChanged 13: customer.RecentOrders.ToList(); //will trigger the lazy loading 14: } 15: } Any problems, questions, do drop me a line!

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• Problems with MGCP proxy creation

  - by Popof

  Hi, I'm trying to bypass my ISP router with my FreeBSD server (I've an optical connection so I've a RJ45 used to connect the box to WAN) Internet and TV are working fine (Using igmpproxy to forward TV stream) but I've a problem with phone. ISP's box is connected to the server which gives it a LAN address. The problem is that when the box builds MGCP packets (and especially SDP ones) it uses its LAN address. So I've think of writing an UDP proxy to handle MGCP and SDP packets in order to replace LAN address with server WAN address and then forward packet to WAN. Before starting coding I've captured stream packets using my server as a bridge between WAN connection and the ISP's box. And, in order to see if my solution is viable, I've tried to send those packets to the box using nemesis. I tried to send a packet (found in capture) containing an endpoint audit: AUEP 1447 aaln/[email protected] MGCP 1.0 F: A In the wireshark capture the box replied: 200 1447 OK A: a:PCMU;PCMA;G726-16;G726-24;G726-32;G726-40;G.723.1-5.3;G.723.1-6.3;G729;TELEPHONE-EVENT, fmtp:"TELEPHONE-EVENT 0-15,144,149,159", p:10-30, b:4-40, e:on, t:00, s:on, v:L;M;G;D, m:sendonly;recvonly;sendrecv;inactive;confrnce;replcate;netwtest;netwloop, dq-gi But when I use nemesis, I got an ICMP error: Port unreachable (Type 3, Code 3). To build this packet, WAN source address of the capture is replaced with my server LAN address, using the mgcp-callagent port (2727) and the packet is sent to the LAN address of the box at mgcp-gateway port (2427). The command I use is nemesis udp -S 192.168.2.1 -D 192.168.2.2 -x 2727 -y 2427 -P packet_to_send. I also tried an UDP scan to the box on callagent and gateway port: PORT STATE SERVICE 2727/udp open|filtered unknown 2427/udp closed unknown I found those results a little bit strange because it should be the 2427 port opened, as it was in capture. Internet Protocol, Src: <ISP MGCP Server>, Dst: <My WAN Address> User Datagram Protocol, Src Port: mgcp-callagent (2727), Dst Port: mgcp-gateway (2427) Does someone has any idea about how having my box responding to my requests ? Thanks in advance and sorry for my english.

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• Deploying play! 2.0 application on an apache server with a reverse proxy

  - by locrizak

  I'm trying to deploy my play! 2.0 application on an Ubuntu 11.10 server and I have been running into error after error and hope someone can help me here. I am try to deploy my Play! application using a reverse proxy on Apache 2. I have enabled the apache proxy modules and configured the proxy.conf file in mods_enabled. The vhost for my domain looks like this: <Directory /var/www/stage.domain.com AllowOverride None Order Deny,Allow Deny from all </Directory <VirtualHost *:80 DocumentRoot /var/www/stage.domain.com/web ServerName stage.domain.com ServerAdmin [email protected] # ProxyRequests Off # ProxyPreserveHost On <Proxy * Order allow,deny Allow from all </Proxy # ProxyVia On # ProxyPass /play/ http://localhost:9000/ # ProxyPassReverse /play/ http://localhost:9000/ ErrorLog /var/log/ispconfig/httpd/stage.domain.com/error.log ErrorDocument 400 /error/400.html ErrorDocument 401 /error/401.html ErrorDocument 403 /error/403.html ErrorDocument 404 /error/404.html ErrorDocument 405 /error/405.html ErrorDocument 500 /error/500.html ErrorDocument 502 /error/502.html ErrorDocument 503 /error/503.html <IfModule mod_ssl.c </IfModule <Directory /var/www/stage.domain.com/web Options FollowSymLinks AllowOverride All Order allow,deny Allow from all </Directory <Directory /var/www/clients/client2/web7/web Options FollowSymLinks AllowOverride All Order allow,deny Allow from all </Directory # Clear PHP settings of this website <FilesMatch "\.ph(p3?|tml)$" SetHandler None </FilesMatch # mod_php enabled AddType application/x-httpd-php .php .php3 .php4 .php5 php_admin_value sendmail_path "/usr/sbin/sendmail -t -i [email protected]" php_admin_value upload_tmp_dir /var/www/clients/client2/web7/tmp php_admin_value session.save_path /var/www/clients/client2/web7/tmp # PHPIniDir /var/www/conf/web7 php_admin_value open_basedir /var/www/clients/client2/web7/:/var/www/clients/client2/web7/web:/va$ # add support for apache mpm_itk <IfModule mpm_itk_module AssignUserId web7 client2 </IfModule <IfModule mod_dav_fs.c # Do not execute PHP files in webdav directory <Directory /var/www/clients/client2/web7/webdav <FilesMatch "\.ph(p3?|tml)$" SetHandler None </FilesMatch </Directory # DO NOT REMOVE THE COMMENTS! # IF YOU REMOVE THEM, WEBDAV WILL NOT WORK ANYMORE! # WEBDAV BEGIN # WEBDAV END </IfModule # <Location /play/ # ProxyPass http://localhost:9000/ # SetEnv force-proxy-request-1.0 1 # SetEnv proxy-nokeepalive 1 # </Location ProxyRequests Off ProxyPass /play/ http://localhost:9000/ ProxyPassReverse /play/ localhost:9000/ ProxyPass /play http://localhost:9000/ ProxyPassReverse /play http://localhost:9000/ # SetEnv force-proxy-request-1.0 1 # SetEnv proxy-nokeepalive 1 </VirtualHost This vhost file was generated by ispconfig and I have not touched anything that was there before just added onto. As you can see by the commented out parts I have tried a lot of different things based on random tutorials I have found but all of them have ended up in Internal Server Error, 503 and most often a '502 Bad Gateway`. I can start play and it does connect successfully to my database. I can get a page to show up when there is an error and the play! stack trace error pages comes up but where everything is fine I get one of the errors above. My application.conf file looks like this: db info ....... application.mode=PROD logger.root=ERROR # Logger used by the framework: logger.play=INFO # Logger provided to your application: logger.application=DEBUG http.path="/play/" XForwardedSupport="127.0.0.1" And my hosts file looks like this (I have never changed or added anything to the host file): 127.0.0.1 localhost 127.0.1.1 matrix # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters Any insights onto what I might be doing wrong or if theres anything I can try please let me know! Thanks!! Edit Again the reverse proxy will work (I checked with sending to to google.com). Its when there is a successful connection to Netty. It's like Netty refuses the connection to the page. Edit 2 output from apachectl -S _default_:8081 127.0.0.1 (/etc/apache2/sites-enabled/000-apps.vhost:10) *:8090 is a NameVirtualHost default server 127.0.0.1 (/etc/apache2/sites-enabled/000-ispconfig.vhost:10) port 8090 namevhost 127.0.0.1 (/etc/apache2/sites-enabled/000-ispconfig.vhost:10) *:80 is a NameVirtualHost default server 127.0.0.1 (/etc/apache2/sites-enabled/000-default:1) port 80 namevhost 127.0.0.1 (/etc/apache2/sites-enabled/000-default:1) port 80 namevhost domain.com (/etc/apache2/sites-enabled/100-domain.com.vhost:7) port 80 namevhost domain.com (/etc/apache2/sites-enabled/100-domain.com.vhost:7) port 80 namevhost domain.com (/etc/apache2/sites-enabled/100-domain.com.vhost:7) port 80 namevhost domain.com (/etc/apache2/sites-enabled/100-domain.com.vhost:7) port 80 namevhost domain.com (/etc/apache2/sites-enabled/100-domain.com.vhost:7) port 80 namevhost stage.domain.com (/etc/apache2/sites-enabled/100-stage.domain.com.vhost:7) port 80 namevhost domain.com (/etc/apache2/sites-enabled/100-domain.com.vhost:7)

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• How to disable proxy requests once a server has been added to spammers "open proxy" list?

  - by Matt

  Hello all, I've just started in a new company, and have been going over the setup of their Apache webserver conf files... only to find that they've had their apache servers set up as open proxies available to all the world for the last two months. I've already set ProxyRequests Off in the httpd.conf file and restarted the web server, but the access log file is still growing at a horrendous rate (about a gig a day). I noticed that another question was posted on here about this (http://serverfault.com/questions/63715/apache-hit-with-proxy-request), but their access log was supposedly returning 404 errors, while mine appears to be returning 403 and 404 codes... Is this correct? Here are a few lines out of my access log: 87.118.118.124 - - [16/Mar/2010:10:56:36 -0400] "GET http://www.c5interlude.ru/torrent/viewtopic.php?p=2501 HTTP/1.0" 404 219 "http://www.c5interlude.ru/torrent/viewtopic.php?p=2501" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.1.4322)" 117.41.184.27 - - [16/Mar/2010:10:56:36 -0400] "GET http://ad.xtendmedia.com/st?ad_type=iframe&ad_size=300x250&section=790074 HTTP/1.0" 404 200 "http://www.newbiegamer.com" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; Alexa Toolbar)" 122.224.55.222 - - [16/Mar/2010:10:56:36 -0400] "GET http://www.188woool.net/\xb4\xf3\xd4\xcb\xb4\xab\xca\xc0.rar HTTP/1.1" 403 214 "http://www.188woool.net/\xb4\xf3\xd4\xcb\xb4\xab\xca\xc0.rar" "Mozilla/4.0" 58.55.21.40 - - [16/Mar/2010:10:56:36 -0400] "GET http://www.cpx24.com/ad1.js HTTP/1.0" 404 204 "http://thebighits.com/?id=aibux" "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)" 122.226.223.188 - - [16/Mar/2010:10:56:36 -0400] "GET http://ad.reduxmedia.com/st?ad_type=iframe&ad_size=160x600&section=798636 HTTP/1.0" 404 200 "http://www.gvvu.com" "Mozilla/4.0 (compatible; MSIE 5.5; AOL 6.0; Windows 98; Win 9x 4.90)" 84.51.109.31 - - [16/Mar/2010:10:56:36 -0400] "GET http://www.kslp.ru/forum/index.php HTTP/1.0" 404 213 "http://www.kslp.ru/forum/index.php" "Mozilla/4.0 (compatible; MSIE 7.0b; Windows NT 6.0 ; .NET CLR 2.0.50215; SL Commerce Client v1.0; Tablet PC 2.0" 122.224.48.49 - - [16/Mar/2010:10:56:36 -0400] "GET http://www1.vip218.com/\xb2\xca\xba\xe7\xb4\xab\xca\xc0.exe HTTP/1.1" 403 214 "http://www1.vip218.com/\xb2\xca\xba\xe7\xb4\xab\xca\xc0.exe" "Mozilla/4.0" 117.41.184.27 - - [16/Mar/2010:10:56:36 -0400] "GET http://ad.xtendmedia.com/st?ad_type=iframe&ad_size=728x90&section=657624 HTTP/1.0" 404 200 "http://www.raiseanimals.com" "Mozilla/4.0 (compatible; MSIE 6.0; Windows 98; Alexa Toolbar)" And my corresponding error log entries: [Tue Mar 16 10:56:36 2010] [error] [client 87.118.118.124] File does not exist: C:/public_html/torrent, referer: http://www.c5interlude.ru/torrent/viewtopic.php?p=2501 [Tue Mar 16 10:56:36 2010] [error] [client 117.41.184.27] File does not exist: C:/public_html/st, referer: http://www.newbiegamer.com [Tue Mar 16 10:56:36 2010] [error] [client 122.224.55.222] (22)Invalid argument: Cannot map GET http://www.188woool.net/\xb4\xf3\xd4\xcb\xb4\xab\xca\xc0.rar HTTP/1.1 to file, referer: http://www.188woool.net/\xb4\xf3\xd4\xcb\xb4\xab\xca\xc0.rar [Tue Mar 16 10:56:36 2010] [error] [client 58.55.21.40] File does not exist: C:/public_html/ad1.js, referer: http://thebighits.com/?id=aibux [Tue Mar 16 10:56:36 2010] [error] [client 122.226.223.188] File does not exist: C:/public_html/st, referer: http://www.gvvu.com [Tue Mar 16 10:56:36 2010] [error] [client 84.51.109.31] File does not exist: C:/public_html/forum, referer: http://www.kslp.ru/forum/index.php [Tue Mar 16 10:56:36 2010] [error] [client 122.224.48.49] (22)Invalid argument: Cannot map GET http://www1.vip218.com/\xb2\xca\xba\xe7\xb4\xab\xca\xc0.exe HTTP/1.1 to file, referer: http://www1.vip218.com/\xb2\xca\xba\xe7\xb4\xab\xca\xc0.exe [Tue Mar 16 10:56:36 2010] [error] [client 117.41.184.27] File does not exist: C:/public_html/st, referer: http://www.raiseanimals.com Does this in fact look like the server is blocking them correctly, and is there anything else that I could do better to cut down on my access log size? (perhaps block these requests from the server completely?) Thanks! Matt

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• Quick change of SSH tunnel port forwarding options for SOCKS proxy

  - by user1335897

  The goal is to have access to internet thru SSH tunneling to SOCKS proxy. Me - ssh-on-my-vps - SOCKS proxy - internet Thing is I want to be able to quickly change the SOCKS proxy in this chain. If I use port forwarding on ssh, I assume I have to re-establish SSH tunnel with new SOCKS proxy address in parameters whenever I want to change proxy. Is that right? If it is, then I probably should always point SSH tunnel to localhost listening proxy server which will send requests to specified SOCKS proxy. So what local proxy I should choose that allows to easily change the destination SOCKS proxy via maybe reading from local file where I would put the SOCKS proxy address or via specifying new SOCKS address in its web-admin page?

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