在 Apache 2.4 编译 mod_evasive 时遇到以下错误：
mod_evasive20.c: In function ‘access_checker’:
mod_evasive20.c:142: error: ‘conn_rec’ has no member named ‘remote_ip’
mod_evasive20.c:146: error: ‘conn_rec’ has no member named ‘remote_ip’
mod_evasive20.c:158: error: ‘conn_rec’ has no member named ‘remote_ip’
mod_evasive20.c:165: error: ‘conn_rec’ has no member named ‘remote_ip’
mod_evasive20.c:180: error: ‘conn_rec’ has no member named ‘remote_ip’
mod_evasive20.c:187: error: ‘conn_rec’ has no member named ‘remote_ip’
mod_evasive20.c:208: error: ‘conn_rec’ has no member named ‘remote_ip’
mod_evasive20.c:212: warning: implicit declaration of function ‘getpid’
mod_evasive20.c:215: error: ‘conn_rec’ has no member named ‘remote_ip’
mod_evasive20.c:221: error: ‘conn_rec’ has no member named ‘remote_ip’
mod_evasive20.c:222: error: ‘conn_rec’ has no member named ‘remote_ip’
mod_evasive20.c:228: error: ‘conn_rec’ has no member named ‘remote_ip’
apxs:Error: Command failed with rc=65536
在 Google 找了一下，原因出在 Apache 2.4 的 remote_ip 改名为 client_ip，要成功安装，可以将 mod_evasive20.c 内的 remote_ip 字串改为 client_ip，方法如下：
cp mod_evasive20.c mod_evasive24.c
sed s/remote_ip/client_ip/g -i mod_evasive24.c
然后用 apxs 编译新的 mod_evasive24.c：
apxs -i -a -c mod_evasive24.c