Effectivement le ping foire lorsque j'arrête toute activité.

Après avoir laissé plus de 2000 ping se passé sans aucun probléme, j'arrête l'opération, sans aucune coupure du prompt distant.

5 seconde après al coupure le prompt distant se fige >> je ping depuis ma machine cliente avec tcpdump sur la machine cliente.

[mathieu@Arch ~]$ ping 192.168.0.12 
PING 192.168.0.12 (192.168.0.12) 56(84) bytes of data.
64 bytes from 192.168.0.12: icmp_req=1 ttl=64 time=0.124 ms
64 bytes from 192.168.0.12: icmp_req=25 ttl=64 time=3.25 ms
64 bytes from 192.168.0.12: icmp_req=25 ttl=64 time=3.27 ms (DUP!) 
64 bytes from 192.168.0.12: icmp_req=26 ttl=64 time=0.126 ms
64 bytes from 192.168.0.12: icmp_req=27 ttl=64 time=0.129 ms
64 bytes from 192.168.0.12: icmp_req=28 ttl=64 time=0.126 ms
64 bytes from 192.168.0.12: icmp_req=29 ttl=64 time=0.133 ms
64 bytes from 192.168.0.12: icmp_req=30 ttl=64 time=0.129 ms

et sur tcpdump :

[mathieu@Arch ~]$ sudo tcpdump -v | grep 192.168.0.12
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 1, length 64
 192.168.0.12 > 192.168.0.11: ICMP echo reply, id 3616, seq 1, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 2, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 3, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 4, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 5, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 6, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 7, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 8, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 9, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 10, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 11, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 12, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 13, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 14, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 15, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 16, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 17, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 18, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 19, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 20, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 21, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 22, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 23, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 24, length 64
 192.168.0.11 > 192.168.0.12: ICMP echo request, id 3616, seq 25, length 64
21:31:15.112486 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 192.168.0.11 tell 192.168.0.12, length 46
 192.168.0.12.microsoft-ds > 192.168.0.11.47215: Flags [F.], cksum 0xf65b (correct), seq 2189716903, ack 569808121, win 91, options [nop,nop,TS val 2892326820 ecr 26642357], length 0
 192.168.0.11.47215 > 192.168.0.12.microsoft-ds: Flags [F.], cksum 0x818e (incorrect -> 0xafdc), seq 1, ack 1, win 115, options [nop,nop,TS val 26660379 ecr 2892326820], length 0
 192.168.0.11.47218 > 192.168.0.12.microsoft-ds: Flags [S], cksum 0x8196 (incorrect -> 0x0663), seq 1398057463, win 14600, options [mss 1460,sackOK,TS val 26660379 ecr 0,nop,wscale 7], length 0
 192.168.0.12.microsoft-ds > 192.168.0.11.47215: Flags [.], cksum 0xaff3 (correct), ack 2, win 91, options [nop,nop,TS val 2892326821 ecr 26660379], length 0
 192.168.0.12.microsoft-ds > 192.168.0.11.47218: Flags [S.], cksum 0xfd92 (correct), seq 862643122, ack 1398057464, win 5792, options [mss 1460,sackOK,TS val 2892326821 ecr 26660379,nop,wscale 6], length 0
 192.168.0.11.47218 > 192.168.0.12.microsoft-ds: Flags [.], cksum 0x818e (incorrect -> 0x428b), ack 1, win 115, options [nop,nop,TS val 26660379 ecr 2892326821], length 0