Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 213.136.72.1 0.0.0.0 UG 0 0 0 eth0
213.136.72.0. 0.0.0.0. 255.255.255.0. U 0 0 0. eth0
Remove from static table route this to permit to reach the internal network ip always passing through the closed router
ip route del 213.136.72.0/24 via 0.0.0.0 dev eth0
[root@mail ~]# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 213.136.72.1 0.0.0.0 UG 0 0 0 eth0