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  • linux 双网关双IP设置

    server:CentOS5.8

    ip:172.16.8.11 Gateway:172.16.8.1

    ip:10.120.6.78 Gateway:10.120.6.1

    网卡配置:

    eth0 point:
    
    [root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
    # Intel Corporation 82576 Gigabit Network Connection
    DEVICE=eth0
    BOOTPROTO=none
    HWADDR=80:FB:06:B0:F3:CE
    ONBOOT=yes
    IPADDR=172.16.8.11
    NETMASK=255.255.255.0
    GATEWAY=172.16.8.1
    TYPE=Ethernet
    
    ech1 point:
    [root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth1
    DEVICE=eth1
    BOOTPROTO=none
    HWADDR=80:FB:06:B0:F3:CF
    ONBOOT=yes
    
    HOTPLUG=no
    IPADDR=10.120.6.78
    NETMASK=255.255.254.0

    打开转发:

            
    [root@localhost ~]# echo 1 > /proc/sys/net/ipv4/ip_forward 
    
    不知道这一步是不是有必要我临时打开了。

    配置路由表:

    [root@localhost ~]# cat /etc/iproute2/rt_tables 
    # reserved values
    255     local
    254     main
    
    
    253     default
    252     net0
    251     net1
    0       unspec
    #
    # local
    #
    #1      inr.ruhep
    [root@localhost ~]#

    使用ip route添加默认路由:

    ip route add 127.0.0.0/8 dev lo table net1
    ip route add default via 172.16.8.1 dev eth0 src 172.16.8.11 table net1
    ip rule add from 172.16.8.11 table net1
    
    ip route add 127.0.0.0/8 dev lo table net0
    ip route add default via 10.120.6.1 dev eth1 src 10.120.6.78 table net0
    ip rule add from 10.120.6.78 table net0
    
    ip route flush table net1
    ip route flush table net0

    注意测试的时候指定源地址:

    [root@localhost ~]# ping -I 172.16.8.11 www.baidu.com
    PING www.a.shifen.com (220.181.111.188) from 172.16.8.11 : 56(84) bytes of data.
    64 bytes from 220.181.111.188: icmp_seq=1 ttl=52 time=8.69 ms
    64 bytes from 220.181.111.188: icmp_seq=2 ttl=52 time=8.57 ms
    
    --- www.a.shifen.com ping statistics ---
    2 packets transmitted, 2 received, 0% packet loss, time 999ms
    rtt min/avg/max/mdev = 8.575/8.636/8.698/0.111 ms
    [root@localhost ~]#
    
    
    
    ++++++++++++++++++++++++++++++++++++++++++++++++++
    [root@localhost ~]# ping -I 10.120.6.78 10.11.240.22
    PING 10.11.240.22 (10.11.240.22) from 10.120.6.78 : 56(84) bytes of data.
    64 bytes from 10.11.240.22: icmp_seq=1 ttl=251 time=10.9 ms
    64 bytes from 10.11.240.22: icmp_seq=2 ttl=251 time=10.6 ms
    64 bytes from 10.11.240.22: icmp_seq=3 ttl=251 time=10.6 ms
    64 bytes from 10.11.240.22: icmp_seq=4 ttl=251 time=10.7 ms
    64 bytes from 10.11.240.22: icmp_seq=5 ttl=251 time=10.8 ms
    64 bytes from 10.11.240.22: icmp_seq=6 ttl=251 time=10.5 ms
    64 bytes from 10.11.240.22: icmp_seq=7 ttl=251 time=10.6 ms
    
    --- 10.11.240.22 ping statistics ---
    7 packets transmitted, 7 received, 0% packet loss, time 6002ms
    rtt min/avg/max/mdev = 10.525/10.727/10.910/0.172 ms
    [root@localhost ~]#

    PS:10.11.240.22 是我们的ipsec对端,是能够通过10.120.6.78 访问的。

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  • 原文地址:https://www.cnblogs.com/osxlinux/p/3719949.html
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