Difference between revisions of "IPVS FULLNAT and SYNPROXY"

Revision as of 02:53, 31 July 2012

Introduction

FULLNAT: A new packet forwarding model as DR/NAT/TUNNEL;

The main principle: introduce local ip address (IDC internal ip address, lip), translate cip-vip to lip-rip, lip and rip both are IDC internal ip address, so LVS-RS can be inter-vlan communication, and RS only need access to internal network.

SYNPROXY: synflood attack defence module

The main principle: based on tcp syncookies, refer to http://en.wikipedia.org/wiki/SYN_cookies;

The first FULLNAT and SYNPROXY modules were added to IPVS in Linux kernel 2.6.9 by WenLi,YanTian,JianChen,YangYi,YaoguangSun,FangHan,Yingliu and JiamingWu. Now, the second FULLNAT and SYNPROXY modules were added in Linux kernel 2.6.32 by JianChen,JiamingWu and WensongZhang;

The new FULLNAT+SYNPROXY support was add to keepalived/ipvsadm by JiajunZhang,ZiangChen and ShunminZhu.

Please note that FULLNAT and SYNPROXY are experimental and has only had limited testing.

Document

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Building

1. LVS Kernel

1.1 get kernel rpm from redhat

 wget ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/kernel-2.6.32-220.23.1.el6.src.rpm

1.2 get kernel source code from rpm

 vim ~/.rpmmacros;
   add:
     %_topdir /home/pukong/rpms
     %_tmppath /home/pukong/rpms/tmp
     %_sourcedir /home/pukong/rpms/SOURCES
     %_specdir /home/pukong/rpms/SPECS
     %_srcrpmdir /home/pukong/rpms/SRPMS
     %_rpmdir /home/pukong/rpms/RPMS
     %_builddir /home/pukong/rpms/BUILD
 cd /home/pukong;
   mkdir rpms;
   mkdir rpms/tmp;
   mkdir rpms/SOURCES;
   mkdir rpms/SPECS;
   mkdir rpms/SRPMS;
   mkdir rpms/RPMS;
   mkdir rpms/BUILD;
 rpm -ivh kernel-2.6.32-220.23.1.el6.src.rpm;
 cd /home/pukong/rpms/SPECS;
 rpmbuild -bp kernel.spec;

 then you can find kernel source code in /home/pukong/rpms/BUILD.

1.3 add lvs patch

 cd /home/pukong/rpms/BUILD/;
 cd kernel-2.6.32-220.23.1.el6/linux-2.6.32-220.23.1.el6.x86_64/;
 cp lvs-2.6.32-220.23.1.el6.patch ./;
 patch -p1<lvs-2.6.32-220.23.1.el6.patch;

 Or you can directly get source code from linux-2.6.32-220.23.1.el6.x86_64.lvs.src.tar.gz;

1.4 compile and install

 make -j16;
 make modules_install;
 make install;

2. RealServer Kernel (TOA)

2.1 get kernel source code, the same as step 1.1 and 1.2;

2.2 add toa patch

 cd /home/pukong/rpms/BUILD/;
 cd kernel-2.6.32-220.23.1.el6/linux-2.6.32-220.23.1.el6.x86_64/;
 cp toa-2.6.32-220.23.1.el6.patch ./;
 patch -p1<toa-2.6.32-220.23.1.el6.patch;

 Or you can get source code directly from linux-2.6.32-220.23.1.el6.x86_64.rs.src.tar.gz;

2.3 compile and install

 make -j16;
 make modules_install;
 make install;

3. LVS Tools (keepalived/ipvsadm/quaage)

 cd /home/pukong;
 cp lvs-tools.tar.bz2 ./;
 tar xzf lvs-tools.tar.bz2;
 cd tools;

3.1 keepalived install

 cd keepalived;
 ./configure --with-kernel-dir="/lib/modules/`uname -r`/build";
 make;
 make install;

3.2 ipvsadm install

 cd ipvsadm;
 make;
 make install;

3.3 quaage install

 cd quagga;
 ./configure --disable-ripd --disable-ripngd --disable-bgpd --disable-watchquagga --disable-doc  --enable-user=root --enable-vty-group=root --enable-group=root --enable-zebra --localstatedir=/var/run/quagga

make

 make;
 make install;