What apache rewrite rules do you have? You should consider using nginx to rewrite not apache.

Here what I have now in my .htaccess, I’m not sure that it possible to replace all that with nginx rewrite, as far as I can understand I can fix 1st part (redirect all users to 'www.' prefix), but other are really hard to migrate.

 `<ifmodule mod_rewrite.c="">RewriteEngine on

  RewriteCond %{HTTP_HOST} ^site1\.com$ [NC]
  RewriteRule ^(.*)$ http://www.site1.com/$1 [L,R=301]
  RewriteCond %{HTTP_HOST} ^site2\.com$ [NC]
  RewriteRule ^(.*)$ http://www.site1.com/$1 [L,R=301]
  RewriteCond %{HTTP_HOST} ^site4\.com$ [NC]
  RewriteRule ^(.*)$ http://www.site1.com/$1 [L,R=301]
  RewriteCond %{HTTP_HOST} ^site3\.com$ [NC]
  RewriteRule ^(.*)$ http://www.site1.com/$1 [L,R=301]
  RewriteCond %{HTTP_HOST} ^www\.site2\.com$ [NC]
  RewriteRule ^(.*)$ http://www.site1.com/$1 [L,R=301]
  RewriteCond %{HTTP_HOST} ^www\.site3\.com$ [NC]
  RewriteRule ^(.*)$ http://www.site1.com/$1 [L,R=301]
  RewriteCond %{HTTP_HOST} ^www\.site4\.com$ [NC]
  RewriteRule ^(.*)$ http://www.site1.com/$1 [L,R=301]

### BOOST START ###
  AddDefaultCharset utf-8
  <filesmatch "(\.html|\.xml|\.json)$"=""><ifmodule mod_headers.c="">Header set Expires "Sun, 19 Nov 1978 05:00:00 GMT"
      Header set Cache-Control "no-store, no-cache, must-revalidate, post-check=0, pre-check=0"</ifmodule></filesmatch> 
  <ifmodule mod_mime.c="">AddCharset utf-8 .html
    AddCharset utf-8 .xml
    AddCharset utf-8 .css
    AddCharset utf-8 .js
    AddCharset utf-8 .json</ifmodule> 
  <filesmatch "(\.html)$"="">ForceType text/html</filesmatch> 
  <filesmatch "(\.xml)$"="">ForceType text/xml</filesmatch> 
  <filesmatch "(\.json|\.js)$"="">ForceType text/javascript</filesmatch> 
  <filesmatch "(\.css)$"="">ForceType text/css</filesmatch> 

  # NORMAL - Cached css & js files
  RewriteCond %{DOCUMENT_ROOT}/cache/perm/%{SERVER_NAME}%{REQUEST_URI}_\.css -s
  RewriteRule .* cache/perm/%{SERVER_NAME}%{REQUEST_URI}_\.css [L,QSA,T=text/css]
  RewriteCond %{DOCUMENT_ROOT}/cache/perm/%{SERVER_NAME}%{REQUEST_URI}_\.js -s
  RewriteRule .* cache/perm/%{SERVER_NAME}%{REQUEST_URI}_\.js [L,QSA,T=text/javascript]

  # Caching for anonymous users
  # Skip boost IF not get request OR uri has wrong dir OR cookie is set OR request came from this server OR https request
  RewriteCond %{REQUEST_METHOD} !^(GET|HEAD)$ [OR]
  RewriteCond %{REQUEST_URI} (^/(admin|cache|misc|modules|sites|system|openid|themes|node/add))|(/(comment/reply|edit|user|user/(login|password|register))$) [OR]
  RewriteCond %{HTTP_COOKIE} DRUPAL_UID [OR]
  RewriteCond %{HTTP:Pragma} no-cache [OR]
  RewriteCond %{HTTP:Cache-Control} no-cache [OR]
  RewriteCond %{HTTPS} on
  RewriteRule .* - [s]

  # NORMAL
  RewriteCond %{DOCUMENT_ROOT}/cache/normal/%{SERVER_NAME}%{REQUEST_URI}_%{QUERY_STRING}\.html -s
  RewriteRule .* cache/normal/%{SERVER_NAME}%{REQUEST_URI}_%{QUERY_STRING}\.html [L,T=text/html]
  RewriteCond %{DOCUMENT_ROOT}/cache/normal/%{SERVER_NAME}%{REQUEST_URI}_%{QUERY_STRING}\.xml -s
  RewriteRule .* cache/normal/%{SERVER_NAME}%{REQUEST_URI}_%{QUERY_STRING}\.xml [L,T=text/xml]
  RewriteCond %{DOCUMENT_ROOT}/cache/normal/%{SERVER_NAME}%{REQUEST_URI}_%{QUERY_STRING}\.json -s
  RewriteRule .* cache/normal/%{SERVER_NAME}%{REQUEST_URI}_%{QUERY_STRING}\.json [L,T=text/javascript]

  ### BOOST END ###

  # Rewrite URLs of the form 'x' to the form 'index.php?q=x'.
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_URI} !=/favicon.ico
  RewriteRule ^(.*)$ index.php?q=$1 [L,QSA]
  RedirectMatch ^/contribut-missing-images$ /forums/showthread.php?t=67
  RedirectMatch ^/user/password$ /forums/login.php?do=lostpw
  RedirectMatch ^/user/(.*)$ /profile.php
  RedirectMatch ^/users/(.*)$ /profile.php
  RedirectMatch ^/messages$ http://www.site1.com/forums/private.php

  #
  # Externally redirect direct client requests for "/index.htm" to "/" in
  # canonical domain (This applies to /index pages in any directory)
  RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /([^/]+/)*index\.htm\ HTTP/
  RewriteRule ^(([^/]+/)*)index\.htm$ http://www.site1.com/$1 [R=301,L]
  #
  # Externally redirect to remove multiple contiguous slashes at beginning or end of URL
  RewriteCond %{REQUEST_URI} ^//+(.*)$ [OR]
  RewriteCond %{REQUEST_URI} ^(.*/)/+$
  RewriteRule / http://www.site1.com/%1 [R=301,L]
  #
  # Externally redirect to remove multiple contiguous slashes embedded in URL
  RewriteCond %{REQUEST_URI} ^/([^/]+)//+(.*)$
  RewriteRule // http://www.site1.com/%1/%2 [R=301,L]</ifmodule>` [/s]

Well now im sure that it not mod_rewrite probem. Even if I remove .htaccess from site I still get that strange redirect to local ip. I even not sure is it really redirect, since I can’t found any info about that “redirect” in logs :(

Here's a question…have you cleared your local cache? Maybe your browser is doing it.

I’m sure that it not local problem, even more. Based on my experiments I can say, that problem in communication in some part between “nginx” and “Apache with mod-rpaf”. Looks like some variable start to return user ip as host name and not web site name. Maybe problem in “nginx” proxy configuration. I forgot to add some thing important :(

Here my nginx config:

http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
access_log off;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
gzip on;

server {
listen 80;
server_name _;

location / {
proxy_pass http://127.0.0.1:8080/;
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_connect_timeout 90;
proxy_send_timeout 90;
proxy_read_timeout 90;
client_max_body_size 10m;
client_body_buffer_size 128k;
proxy_buffer_size 4k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
root /usr/share/nginx/html;
index index.html index.htm index.php;                                      
}
      error_page  404              /404.html;

        location = /404.html {
            root   /usr/share/nginx/html;
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   /usr/share/nginx/html;
        }

        # proxy static
    location ~* ^.+.(jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|doc|xls|exe|pdf|ppt|txt|tar|mid|midi|wav|bmp|rtf|js)$ {
    root /home/www/static/;
    expires           7d; # caching, expire after 7 days   
        }
    }

Ok. Looks like I found why it redirect there, now only need to understand how to fix this :(

As soon as I enable mod-rpaf it change server_name in all PHP Variable from server name to user ip :(.

So intend of having this without mod-rpaf:

HTTP_HOST www.site.com
SERVER_SIGNATURE     

<address>Apache Server at www.site.com Port 80</address>

SERVER_SOFTWARE     Apache
SERVER_NAME     www.site.com
SERVER_ADDR     127.0.0.1
SERVER_PORT     80
REMOTE_ADDR     127.0.0.1

With mod-rpaf I have this:

HTTP_HOST x.x.x.x 
SERVER_SIGNATURE     

<address>Apache Server at x.x.x.x Port 80</address>

SERVER_NAME     x.x.x.
SERVER_ADDR     127.0.0.1
SERVER_PORT     80
REMOTE_ADDR     x.x.x.x

Where x.x.x.x is user IP.

Anyone have any ideas why this happening.

Sounds like your mod_rpaf is set up wrong make sure you have the following configuration

RPAFenable On
RPAFsethostname On
RPAFproxy_ips 127.0.0.1

I imagine you don't have the sethostname on.

My “rpaf.conf” include this:````

Path to mod_rpaf-2.0.so, relative to /etc/httpd/

LoadModule rpafmodule modules/modrpaf-2.0.so

RPAFenable On
RPAFsethostname On

Define our reverse proxy IP. Only substitute client IP in

when we receive a request from this IP.

RPAFproxy_ips 127.0.0.1

The header where the real client IP address is stored.

RPAFheader X-Forwarded-For
````So it have sethostname, I think maybe problem in mod_rpaf it self, so I will try to remake it on this weekend.

Weird…no clue then since your setup looks identical to mine. Try a remake and pray!

Remake rpaf today and all worked fine. Looks like there was some problem when I compile 1st time.

Glad it's fixed :)