Advanced Routing with iproute2

ip rule show

0:        from all lookup local

32762:    from 192.168.1.51 iif tuntest lookup rule_244

32763:    from 172.31.23.244 iif tuntest lookup rule_244

32764:    from 172.31.23.244 lookup 1

32765:    from 172.31.23.244/24 lookup 1

32766:    from all lookup main

32767:    from all lookup default

delete a rule

ip rule del 172.31.23.244