Au mieux j'arrive à établir une liaison entre les deux ordis via wifi (le ssh marche impecc), mais le net en ethernet ne marche pas :/

Quand la situation est telle, j'ai ça:

guillaume@ninjacat:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:02:3f:0c:76:b7
inet6 addr: fe80::202:3fff:fe0c:76b7/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:521452 errors:2 dropped:2 overruns:2 frame:0
TX packets:441743 errors:0 dropped:0 overruns:2 carrier:0
collisions:0 txqueuelen:1000
RX bytes:483373720 (460.9 MB) TX bytes:186484099 (177.8 MB)
Interrupt:18 Base address:0xa000

eth0:avahi Link encap:Ethernet HWaddr 00:02:3f:0c:76:b7
inet addr:169.254.6.16 Bcast:169.254.255.255 Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:18 Base address:0xa000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:3763 errors:0 dropped:0 overruns:0 frame:0
TX packets:3763 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:4260170 (4.0 MB) TX bytes:4260170 (4.0 MB)

wlan0 Link encap:Ethernet HWaddr 00:0e:9b:69:18:3e
inet6 addr: fe80::20e:9bff:fe69:183e/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:57990 errors:0 dropped:0 overruns:0 frame:0
TX packets:55239 errors:0 dropped:22 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:61030506 (58.2 MB) TX bytes:8426209 (8.0 MB)
Interrupt:19 Memory:e8200800-e8201000

wlan0:avahi Link encap:Ethernet HWaddr 00:0e:9b:69:18:3e
inet addr:169.254.4.22 Bcast:169.254.255.255 Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:19 Memory:e8200800-e8201000