Соединение point-to-point в Debian и CentOS

Пример /etc/network/interfaces в Debian

iface eth0 inet static
        address <IP_ADDR>
        netmask 255.255.255.255
        gateway <GW_IP_ADDR>
        pointopoint <GW_IP_ADDR>

Можно через ifconfig

ifconfig eth0 inet <local_ip> netmask 255.255.255.255 pointopoint <destination_ip>
ip route add default via <destination_ip>

В CentOS чуть сложнее

1. /etc/sysconfig/network-scripts/ifcfg-eth0

   DEVICE=eth0
   HWADDR=<MAC address>
   ONBOOT=yes
   BOOTPROTO=static
   SCOPE="peer "
   IPADDR=<IP_ADDR>
   NETMASK=255.255.255.255

2. /etc/sysconfig/network-scripts/route-eth0

   ADDRESS0=0.0.0.0
   NETMASK0=0.0.0.0
   GATEWAY0=<GW_IP_ADDR>