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Q. How do I configure static IPv6 networking under RHEL 5.x / Fedora / CentOS Linux? A. RHEL / CentOS / Fedora support IPv6 out of box. All you have to do is update two files and turn on networking. You need to update and configure following files for IPv6 configuration: 1. /etc/sysconfig/network : Turn on networking in this file. 2. /etc/sysconfig/network-scripts/ifcfg-eth0 : Set default IPv6 router IP and server IP address in this file. Open /etc/sysconfig/network file, enter: # vi /etc/sysconfig/network Append following line: NETWORKING_IPV6=yes Open /etc/sysconfig/network-scripts/ifcfg-eth0 (1st network config file) # vi /etc/sysconfig/network-scripts/ifcfg-eth0 Append following config directives for IPv6: IPV6INIT=yes IPV6ADDR=<IPv6-IP-Address> IPV6_DEFAULTGW=<IPv6-IP-Gateway-Address> Here is my sample file with mix of IPv4 and IPv6 assigned to eth0: DEVICE=eth0 BOOTPROTO=static ONBOOT=yes HWADDR=00:30:48:33:bc:33 IPADDR=202.54.1.5 GATEWAY=202.54.1.3 NETMASK=255.255.255.248 IPV6INIT=yes IPV6ADDR=2607:f0d0:1002:0011:0000:0000:0000:0002 IPV6_DEFAULTGW=2607:f0d0:1002:0011:0000:0000:0000:0001 Where, * NETWORKING_IPV6=yes|no - Enable or disable global IPv6 initialization. * IPV6INIT=yes - Enable or disable IPv6 configuration for all interfaces. * IPV6ADDR=2607:f0d0:1002:0011:0000:0000:0000:0002 - Specify a primary static IPv6 address here. * IPV6_DEFAULTGW=2607:f0d0:1002:0011:0000:0000:0000:0001 - Add a default route through specified gateway. Save and close the file. Restart networking: # service network restart Verify your configuration by pinging ipv6 enabled site such as ipv6.google.com: $ ping6 ipv6.google.com Sample output: PING ipv6.google.com(2001:4860:b002::68) 56 data bytes 64 bytes from 2001:4860:b002::68: icmp_seq=1 ttl=59 time=93.2 ms 64 bytes from 2001:4860:b002::68: icmp_seq=2 ttl=59 time=95.0 ms 64 bytes from 2001:4860:b002::68: icmp_seq=3 ttl=59 time=94.2 ms 64 bytes from 2001:4860:b002::68: icmp_seq=4 ttl=59 time=95.2 ms 64 bytes from 2001:4860:b002::68: icmp_seq=5 ttl=59 time=94.8 ms 64 bytes from 2001:4860:b002::68: icmp_seq=6 ttl=59 time=95.1 ms 64 bytes from 2001:4860:b002::68: icmp_seq=7 ttl=59 time=93.3 ms 64 bytes from 2001:4860:b002::68: icmp_seq=8 ttl=59 time=93.8 ms --- ipv6.google.com ping statistics --- 8 packets transmitted, 8 received, 0% packet loss, time 7010ms rtt min/avg/max/mdev = 93.268/94.376/95.268/0.799 ms Traces path to a network host, enter: $ traceroute6 ipv6.google.com Print default IPv6 routing table, enter: $ route -n -A inet6 Sample output: Kernel IPv6 routing table Destination Next Hop Flags Metric Ref Use Iface ::1/128 :: U 0 42531 1 lo ::62.41.14.144/128 :: U 0 0 1 lo ::127.0.0.1/128 :: U 0 0 1 lo ::/96 :: U 256 0 0 sit0 2001:470:1f04:55a::2/128 :: U 0 15201 1 lo 2001:470:1f04:55a::/64 :: U 256 0 0 sit1 fe80::4833:22f4/128 :: U 0 0 1 lo fe80::212:3fff:fe75:fa0d/128 :: U 0 0 1 lo fe80::/64 :: U 256 0 0 eth0 fe80::/64 :: U 256 0 0 sit1 ff00::/8 :: U 256 0 0 eth0 ff00::/8 :: U 256 0 0 sit1 ::/0 :: U 1 0 0 sit1 Once IPv6 configured properly, you need to setup IPv6 firewall using ip6tables command under Linux. (责任编辑：IT) |