Someone

client (Nokia N800):
 
Nokia-N800-39:/home/user# ifconfig tun0 10.10.10.10 pointopoint 10.10.10.11
Nokia-N800-39:/home/user# ifconfig tun0
tun0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          inet addr:10.10.10.10  P-t-P:10.10.10.11  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  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:500 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

 
Server (Soekris OpenBSD):
 
ifconfig tun3 10.10.10.11 10.10.10.10 netmask 255.255.255.252
# ifconfig tun3
tun3: flags=51<UP,POINTOPOINT,RUNNING> mtu 1500
        groups: tun
        inet 10.10.10.11 --> 10.10.10.10 netmask 0xfffffffc
# ping 10.10.10.10
PING 10.10.10.10 (10.10.10.10): 56 data bytes
--- 10.10.10.10 ping statistics ---
5 packets transmitted, 0 packets received, 100.0% packet loss

 
command line used on N800:
 
ssh -w any:any soekris.swill.org