来自： 杨志刚 博客 (http://yangzhigang.cublog.cn)

 

这里我所做的是Redhat Linux,在系统中ifconfig或是netstat -an都会显示出IPV6的结果，如：

[root@WebServer-22 conf]# ifconfig
eth1      Link encap:Ethernet  HWaddr 00:15:C5:EF:74:1C 
          inet addr:192.168.102.22  Bcast:192.168.102.255  Mask:255.255.255.0
          inet6 addr: fe80::215:c5ff:feef:741c/64 Scope:Link

 

[root@WebServer-22 conf]# netstat -ant
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address               Foreign Address            
tcp 0 576 ::ffff:192.168.102.22:22    ::ffff:192.168.12.100:3339  ESTABLISHED
tcp 0 0   ::ffff:192.168.102.22:80    ::ffff:192.168.102.25:36479 TIME_WAIT  
tcp 0 0   ::ffff:192.168.102.22:80    ::ffff:192.168.102.25:36503 TIME_WAIT  

 

在IPV6还没有广泛使用时，这有些不方便，那么在Redhat Linux下禁止IPV6的方法也很容易：
vi /etc/modprobe.conf，加入以下两行参数，

之后reboot。（注：用service network restart是不可以的）

 

重启之后，ifconfig或netstat -ant等只能显示IPV4的地址信息了。

 

对于其他的系统，可以参照以下文档：

Here's the summary of what I can think of, with alternate methods in case the first one doesn't work with you:

• Debian kernel 2.4: In /etc/modutils, change the line alias net-pf-10 ipv6 to alias net-pf-10 off alias ipv6 off Reboot.

• Debian kernel 2.6/Ubuntu ("official" method)/Fedora Core (method 1): In /etc/modprobe.d/aliases, change the line alias net-pf-10 ipv6 to alias net-pf-10 off alias ipv6 off Reboot.

• Debian kernel 2.6/Ubuntu (alternate method): In /etc/modprobe.d/blacklist, add a line blacklist ipv6 Reboot.

• RHEL/CentOS: In /etc/modprobe.conf, make sure you have alias net-pf-10 off alias ipv6 off Reboot.

• RHEL/CentOS/Fedora Core (method 2)/Mandriva (method 1): In /etc/sysconfig/network, add a line NETWORKING_IPV6="no" Reboot.

• SuSE 9.0: In /etc/modules.conf, change the line alias net-pf-10 ipv6 to alias net-pf-10 off alias ipv6 off Reboot.

• SuSE 9.1/9.2/9.3/10.0 ("official" method): In /etc/modprobe.conf, change the line alias net-pf-10 ipv6 to alias net-pf-10 ipv6 install ipv6 /bin/true Reboot.

• SuSE 9.1/9.2/9.3/10.0 (alternate method)/Mandriva (method 2)/Slackware: In /etc/modprobe.conf, make sure you change alias net-pf-10 ipv6 to alias net-pf-10 off alias ipv6 off Reboot.

• Gentoo: In /etc/modules.d/aliases, make sure you change alias net-pf-10 ipv6 to alias net-pf-10 off alias ipv6 off Reboot.

NOTES:

• In distros using /etc/modprobe.conf, beware that you might get overriden by /etc/modprobe.conf.local or by/etc/modprobe.d/*.
• If you disable IPv6, I suppose you don't need tunnels either. You could also add there:
  install sit0 /bin/true
• A last "anti-IPv6" issue: don't forget the old trick of checking if your Firefox has IPv6 disabled:
  • CTRL+L, about:config (Enter)
  • Filter by ipv6.
  • Set network.dns.disableIPv6 to true.

摘于：http://blog.chinaunix.net/uid-7654720-id-1742032.html