serveur:~# ifconfig
eth0      Lien encap:Ethernet  HWaddr 00:30:18:63:56:81  
          inet adr:192.168.0.111  Bcast:192.168.0.255  Masque:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:796594 errors:0 dropped:0 overruns:0 frame:0
          TX packets:234407 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:1000 
          RX bytes:220987246 (210.7 MiB)  TX bytes:243392831 (232.1 MiB)
          Interruption:11 Adresse de base:0xe400 

lo        Lien encap:Boucle locale  
          inet adr:127.0.0.1  Masque:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:296 errors:0 dropped:0 overruns:0 frame:0
          TX packets:296 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:0 
          RX bytes:859336 (839.1 KiB)  TX bytes:859336 (839.1 KiB)

ppp0      Lien encap:Protocole Point-à-Point  
          inet adr:72.55.145.108  P-t-P:1.2.3.4  Masque:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1280  Metric:1
          RX packets:1222 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1715 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:3 
          RX bytes:91580 (89.4 KiB)  TX bytes:1991002 (1.8 MiB)

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serveur:~# route -n
Table de routage IP du noyau
Destination     Passerelle      Genmask         Indic Metric Ref    Use Iface
1.2.3.4         0.0.0.0         255.255.255.255 UH    0      0        0 ppp0
72.55.143.14    192.168.0.1     255.255.255.255 UGH   0      0        0 eth0
192.168.0.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
0.0.0.0         1.2.3.4         0.0.0.0         UG    0      0        0 ppp0