前端Nginx，後端Apache獲取用戶真實IP地址
最近在將Apache-2.2和Apache-2.4添加到《lnmp一鍵安裝包》中，Nginx作爲前端，Apache作爲後端的情況下，Apache只能獲取到Nginx前端的ip地址（127.0.0.1），而無法獲取到用戶的真實ip地址，在這種情況下，後端是Apache如何獲取用戶真實IP地址？
Nginx配置如下：
location / {
try_files $uri @apache;
}
location @apache {
internal;
proxy_pass http://127.0.0.1:8080;
include proxy.conf;
}
location ~ .*.(php|php5)?$ {
proxy_pass http://127.0.0.1:8080;
include proxy.conf;
}
proxy_connect_timeout 300s;
proxy_send_timeout 900;
proxy_read_timeout 900;
proxy_buffer_size 32k;
proxy_buffers 4 64k;
proxy_busy_buffers_size 128k;
proxy_redirect off;
proxy_hide_header Vary;
proxy_set_header Accept-Encoding '';
proxy_set_header Referer $http_referer;
proxy_set_header Cookie $http_cookie;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
獲取真實IP地址有Apache有2個模塊：
mod_rpaf：Apache-2.2支持；Apache-2.4不支持。網上教程很多
mod_remoteip：Apache-2.4自帶模塊；Apache-2.2支持；推薦
Apache-2.2.25
mod_rpaf模塊
wget http://stderr.net/apache/rpaf/download/mod_rpaf-0.6.tar.gz
tar -xzvf mod_rpaf-0.6.tar.gz
cd mod_rpaf-0.6/
/usr/local/apache/bin/apxs -i -c -n mod_rpaf-2.0.slo mod_rpaf-2.0.c
添加Apache配置
vi /usr/local/apache/conf/httpd.conf
Include conf/extra/httpd-rpaf.conf
vi /usr/local/apache/conf/extra/httpd-rpaf.conf
LoadModule rpaf_module modules/mod_rpaf-2.0.so
RPAFenable On
RPAFsethostname On
RPAFproxy_ips 127.0.0.1 10.8.0.110 # 代理服務器的ip地址（記得做相應修改）
RPAFheader X-Forwarded-For
備註：RPAFproxy_ips後面添加代理服務器的ip地址,有幾個填幾個
測試
/usr/local/apache/bin/apachectl -t
/usr/local/apache/bin/apachectl restart
看日誌
mod_remoteip
Apache-2.2下配置mod_remoteip如下：
安裝
wget https://github.com/ttkzw/mod_remoteip-httpd22/raw/master/mod_remoteip.c
/usr/local/apache/bin/apxs -i -c -n mod_remoteip.so mod_remoteip.c
修改配置文件：
vi /usr/local/apache/conf/httpd.conf
Include conf/extra/httpd-remoteip.conf
vi /usr/local/apache/conf/extra/httpd-remoteip.conf
LoadModule remoteip_module modules/mod_remoteip.so
RemoteIPHeader X-Forwarded-For
RemoteIPInternalProxy 127.0.0.1
測試：
/usr/local/apache/bin/apachectl -t
/usr/local/apache/bin/apachectl restart
看日誌
Apache-2.4配置mod_remoteip除了上面（自帶mod_remoteip模塊不需要安裝），還需要修改日誌格式（折騰很久）
LogFormat "%h %a %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
LogFormat "%h %a %l %u %t \"%r\" %>s %b" common
LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O" combinedi
在日誌格式中加上%a