apache ProxyPass how to preserve original IP address

Question

We are using ProxyPass to redirect all   r  requests to jboss on port 18080 as follows   ProxyPreserveHost on ProxyPass  r http   localhost 18080 redirectService  ProxyPassReverse  r http   localhost 18080 redirectService    But  that causes the IP address logged in jboss s access log as  127 0 0 1   Does somebody know how can we preserve the original IP from where the request came in HttpServletRequest  We want to acesss it from jboss servlet request in doGet

User · Answer

This has a more elegant explanation and more than one possible solutions. http://kasunh.wordpress.com/2011/10/11/preserving-remote-iphost-while-proxying/

The post describes how to use one popular and one lesser known Apache modules to preserve host/ip while in a setup involving proxying.

Use mod_rpaf module, install and enable it in the backend server and add following directives in the module’s configuration. RPAFenable On
RPAFsethostname On
RPAFproxy_ips 127.0.0.1

(2017 edit) Current location of mod_rpaf: https://github.com/gnif/mod_rpaf

User · Answer

The answer of JasonW is fine  But since apache httpd 2 4 6 there is a alternative  mod remoteip  All what you must do is    May be you must install the mod remoteip package Enable the module   LoadModule remoteip module modules mod remoteip so  Add the following to your apache httpd config  Note that you must add this line not into the configuration of the proxy server  You must add this to the configuration of the proxy target httpd server  the server behind the proxy    RemoteIPHeader X-Forwarded-For    See at http   httpd apache org docs trunk mod mod remoteip html for more informations and more options

User · Answer

If you have the capability to do so  I would recommend using either mod-jk or mod-proxy-ajp to pass requests from Apache to JBoss  The AJP protocol is much more efficient compared to using HTTP proxy requests and as a benefit  JBoss will see the request as coming from the original client and not Apache

User · Answer

You can get the original host from X-Forwarded-For header field

User · Answer

If you are using Apache reverse proxy for serving an app running on a localhost port you must add a location to your vhost    lt Location   gt                 ProxyPass http   localhost 1339  retry 0    ProxyPassReverse http   localhost 1339     ProxyPreserveHost On    ProxyErrorOverride Off  lt  Location gt    To get the IP address have following options   console log   gt  gt  gt    req ip     this works fine for me returned a valid ip address  console log   gt  gt  gt    req headers  x-forwarded-for        returned a valid IP address  console log   gt  gt  gt    req headers  X-Real-IP         did not work returned undefined  console log   gt  gt  gt    req connection remoteAddress      returned the loopback IP address    So either use req ip or req headers  x-forwarded-for

[apache] apache ProxyPass: how to preserve original IP address

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