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  • FreeBSD Set a Default Route / Gateway

    Task: View / Display FreeBSD Routing Table

    Use netstat command with -r option:
    $ netstat -r
    $ netstat -rn

    Output:

    Routing tables
    Internet:
    Destination        Gateway            Flags    Refs      Use  Netif Expire
    default            61.221.xx.yy       UGS         0      247    em1
    10                 10.10.110.5        UGS         0       50    em0
    10.10.110/26       link#1             UC          0        0    em0
    10.10.110.5        00:1b:0d:e6:58:40  UHLW        2        0    em0   1145
    61.221.xx.yy/29    link#2             UC          0        0    em1
    61.221.xx.yy       00:1b:0d:e6:57:c0  UHLW        2        0    em1   1055
    61.221.xx/24       link#2             UC          0        0    em1
    127.0.0.1          127.0.0.1          UH          0        0    lo0

    The first two line displays default routes.

    To just print IPv4 routing table, enter:
    # netstat -4 -r -n

    To just print IPv6 routing table, enter:
    # netstat -6 -r -n

    Task: FreeBSD Set a default route

    All network packets that cannot be sent according to the previous entries of the routing table are sent through the following default gateway:
    # route add default 192.168.1.254

    How do I save routing information to a configuration file?

    If you reboot FreeBSD box, the routing configuration will be lost i.e. the routing information will not persist. You need to edit /etc/rc.conf file to set defaultroute:
    # vi /etc/rc.conf
    Set default route by editing defaultrouter variable:
    defaultrouter="192.168.1.254"
    Save and close the file.

    Task: Start and Stop FreeBSD Configured Interfaces

    To apply changes to a configuration file, you need to stop and restart the corresponding FreeBSD networking interface. The following command will also update routing information:
    # /etc/rc.d/netif restart
    # /etc/rc.d/routing restart

    OR
    # service netif restart
    # service routing restart

    How can I change or the default gateway from the FreeBSD CLI?

    Use the following commands:
    ### [ delete the default route/gateway ] ###
    # route del default
    ### [ now setup 192.168.1.254 as the default gateway for my FreeBSD box ] ###
    route add default 192.168.1.254

    Verify it:
    # netstat -r -n

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  • 原文地址:https://www.cnblogs.com/saryli/p/11847737.html
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