ipip-туннель

auto tun0 
iface tun0 inet static
    address 192.168.0.1
    netmask 255.255.255.255
    pointopoint 148.251.225.166
    mtu 1350
    pre-up /sbin/ip tunnel add tun0 mode ipip remote 151.80.92.205 local 144.76.60.108 dev eth0
    post-down /sbin/ip tunnel del tun0

tun0      Link encap:IPIP Tunnel  HWaddr
          inet addr:192.168.0.1  P-t-P:148.251.225.166  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP  MTU:1350  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:98 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:5645 (5.5 KiB)

auto eth0
iface eth0 inet static
	address 151.80.92.205
	netmask 255.255.255.255
	broadcast 151.80.92.205
	dns-nameservers 8.8.8.8 8.8.4.4
	post-up route add 37.59.47.254 dev eth0
	post-up route add default gw 37.59.47.254
	pre-down route del 37.59.47.254 dev eth0
	pre-down route del default gw 37.59.47.254

auto tun0
iface tun0 inet static
    address 148.251.225.166
    netmask 255.255.255.255
    pointopoint 192.168.0.1
    mtu 1350
    pre-up /sbin/ip tunnel add tun0 mode ipip remote 151.80.92.205 local 151.80.92.205 dev eth0
    post-up /sbin/ip ru add from 148.251.225.166 lookup 17 priority 17
    post-up /sbin/ip ro add default via 192.168.0.1 dev tun0 src 148.251.225.166 table 17 mtu 1350 advmss 1310
    pre-down /sbin/ip ro del default via 192.168.0.1 dev tun0 src 148.251.225.166 table 17 mtu 1350 advmss 1310
    pre-down /sbin/ip ru del from 148.251.225.166 lookup 17 priority 17
    post-down /sbin/ip tunnel del tun0

tun0      Link encap:IPIP Tunnel  HWaddr
          inet addr:148.251.225.166  P-t-P:192.168.0.1  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP  MTU:1350  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)