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BranLiang/unix-network-configuration.md

Last active January 16, 2023 14:51
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Unix network configuration
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unix-network-configuration.md

A tunnel interface example:

utun10: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1350 inet 10.10.0.6 --> 10.10.0.5 netmask 0xffffffff

The following parameters are specific to IP tunnel interfaces, gif(4):

tunnel src_addr dest_addr Configure the physical source and destination address for IP tunnel interfaces. The arguments src_addr and dest_addr are interpreted as the outer source/destination for the encapsulating IPv4/IPv6 header.

So with the example above, 10.10.0.6 is the src_addr and 10.10.0.5 is the dest_addr.

$ ip route list
0.0.0.0/1 via 10.10.0.5 dev utun10 <-- Half of the network is routed to the vpn dest_addr

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