在使用第三方的DANginx插件用在Directadmin apache2.4的时候，发现无法安装mod_rpaf.这个插件是用来让apache获取到访客正确ip的。
apache2.4已经有了mod_remoteip.so 但没时间仔细研究,Directadmin无法正常加载,先行编译mod_rpaf达到要求
编译时提示的错误
# apxs -i -c -n mod_rpaf-2.0.so mod_rpaf-2.0.c
/var/www/build/libtool --silent --mode=compile gcc -std=gnu99 -prefer-pic -DLINUX -D_REENTRANT -D_GNU_SOURCE -g -O2 -pthread -I/usr/include/apache -I/usr/include/apache -I/usr/include/apache -c -o mod_rpaf-2.0.lo mod_rpaf-2.0.c && touch mod_rpaf-2.0.slo
mod_rpaf-2.0.c: In function 'rpaf_cleanup':
mod_rpaf-2.0.c:150: error: 'conn_rec' has no member named 'remote_ip'
mod_rpaf-2.0.c:151: error: 'conn_rec' has no member named 'remote_addr'
mod_rpaf-2.0.c:151: warning: implicit declaration of function 'inet_addr'
mod_rpaf-2.0.c:151: error: 'conn_rec' has no member named 'remote_ip'
mod_rpaf-2.0.c: In function 'change_remote_ip':
mod_rpaf-2.0.c:164: error: 'conn_rec' has no member named 'remote_ip'
mod_rpaf-2.0.c:183: error: 'conn_rec' has no member named 'remote_ip'
mod_rpaf-2.0.c:186: error: 'conn_rec' has no member named 'remote_ip'
mod_rpaf-2.0.c:187: error: 'conn_rec' has no member named 'remote_addr'
mod_rpaf-2.0.c:187: error: 'conn_rec' has no member named 'remote_ip'
apxs:Error: Command failed with rc=65536
解决办法：
wget http://soft.dahualab.com/manage/directadmin/easyinstall/mod_rpaf-0.6.tar.gz
tar xzvf mod_rpaf-0.6.tar.gz
cd mod_rpaf-0.6
apxs -i -c -n mod_rpaf-2.0.so mod_rpaf-2.0.c
mod_rpaf让apache获取访客真实IP
安装好了之后，需要对httpd.conf文件进行配置。
1、在httpd.conf加入如下代码：
1.<IfModule mod_rpaf.c>
2.RPAFenable On
3.RPAFsethostname On
4.RPAFproxy_ips 127.0.0.1
5.RPAFheader X-Forwarded-For
6.</IfModule>
加载模块代码：
1.LoadModule rpaf_module modules/mod_rpaf-2.0.so
2、并定义日志格式
1.LogFormat "%{X-Forwarded-For}i %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" varnishcombined
3、以后可以使用如下代码启用此格式的日志：
1.CustomLog "/home/wwwlogs/$domain.log" varnishcombined