标签：
平台：Centos 6 x86_64，默认内核版本2.6.34
1,准备
yum update -y
yum install -y ncurses-devel gcc make bc wget patch grub
2，下载相关安装包
wget http://download.clearfoundation.com/l7-filter/netfilter-layer7-v2.23.tar.gz
wget http://download.clearfoundation.com/l7-filter/l7-protocols-2009-05-28.tar.gz
wget http://www.netfilter.org/projects/iptables/files/iptables-1.4.21.tar.bz2
wget https://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.35.8.tar.gz
3，编译新内核
tar xvf linux-2.6.35.8.tar.gz -C /usr/src
tar xvf netfilter-layer7-v2.23.tar.gz
cd /usr/src
ln -s linux-2.6.35.8 linux
cd linux
patch -p1 < /root/netfilter-layer7-v2.23/kernel-2.6.35-layer7-2.23.patch
zcat /proc/config.gz > .config
make oldconfig #自选提示的新功能和驱动
make menuconfig #需要增加的编译模块
Networking support → Networking Options → Network packet filtering framework → Core Netfilter Configuration
<M> Netfilter connection tracking support
<M> "connlimit" match support
<M> "conntrack" connection match support
<M> "iprange" match support
<M> "mac" address match support
<M> "multiport" Multiple port match support
<M> "state" match support
<M> "layer7" match support
<M> "string" match support
<M> "time" match support
Networking support → Networking Options →Network packet filtering framework → IP Netfilter Configuration
<M> IPv4 connection tracking support (required for NAT)
<M> Full NAT
<M> MASQUERADE target support
<M> NETMAP target support
<M> REDIRECT target support
sed -i ‘s/# CONFIG_SYSFS_DEPRECATED_V2 is not set/CONFIG_SYSFS_DEPRECATED_V2=y/‘ .config
make CONFIG_DEBUG_SECTION_MISMATCH=y
make -j3 bzImage
make -j3 modules
make
make modules_install
make install #出现‘Cannot find LILO.’不用管它，系统没装也不会用LILO，而且已生成/boot/vmlinuz文件
mv /boot/vmlinuz /boot/vmlinuz-2.6.35
mkinitrd -o initrd-2.6.35.img
cd /boot
mv initramfs-2.6.34-x86_64-linode14.img initrd-2.6.35.img (实际上还是用原系统镜像启动滴)
vi /boot/grub/menu.lst
default 0
timeout 5
title Custom Compiled, kernel 2.6.35
root (hd0)
kernel /boot/vmlinuz-2.6.35 root=/dev/xvda ro quite
initrd /boot/initrd-2.6.35.img
linode manager里对profile修改kernel为pv-grub-x86_64
重启后验证
uname -a
4，安装iptables
cp /etc/init.d/iptables /tmp/
cp /etc/sysconfig/iptables-config /tmp/
rpm -e iptables-ipv6 iptables --nodeps
tar xvf iptables-1.4.21.tar.bz2
cp /root/netfilter-layer7-v2.23/iptables-1.4.3forward-for-kernel-2.6.20forward/libxt_layer7.* /root/iptables-1.4.21/extensions/
cd iptables-1.4.21
./configure --prefix=/usr --with-ksource=/usr/src/linux #提示Iptables modules that will not be built: connlabel不知道是否有关系，先忽略
make
make install
mv /tmp/iptables-config /etc/sysconfig/
mv /tmp/iptables /etc/rc.d/init.d/
vi /etc/init.d/iptables
修改路径如下
if [ ! -x /usr/sbin/$IPTABLES ]; then
echo -n $"${IPTABLES}:/usr/sbin/$IPTABLES does not exist."; warning; echo
exit 5
fi
在 for i in $tables; do
echo -n "$i "
case "$i" in
加入以下内容------------------
security)
$IPTABLES -t filter -P INPUT $policy \
&& $IPTABLES -t filter -P OUTPUT $policy \
&& $IPTABLES -t filter -P FORWARD $policy \
|| let ret+=1
;;
分界限 ------------------
raw)
service iptables restart
iptables -V #查看版本是否正确
5，安装协议特征包：
tar xvf l7-protocols-2009-05-28.tar.gz
cd l7-protocols-2009-05-28
make install
可查看支持的部分协议：
ls protocols/
6，设置iptables规则
iptables -t mangle -I POSTROUTING -m layer7 --l7proto xunlei -j DROP
iptables -t mangle -I PREROUTING -m layer7 --l7proto edonkey -j DROP
iptables -t mangle -I PREROUTING -m layer7 --l7proto bittorrent -j DROP
7，经过测试也不行。找到一个网友的话说：禁止是没有用的，而人类是灵动的，总有人会绕过或者突破禁忌！
看来只有限速了。。
centos 6 上安装l7 filter尝试过滤xunlei
标签：
原文地址：http://my.oschina.net/u/2404183/blog/530100
