> Great thats about all the things I would have checked as well. > > you can test from linux itself with ping -M do -s <packet size> -c 10 > <dest ip> > > I would try using the ping above to find the max mtu size to say > your isp dns or proxy. > > then try it to the sites you can't always get to > >
I do the same test on the gateway and on windows clients below the results : Linux debian 5 ping -M do -s 1465 -c 10 86.64.145.147 PING 86.64.145.147 (86.64.145.147) 1465(1493) bytes of data. >From 86.77.213.79 icmp_seq=1 Frag needed and DF set (mtu = 1492) ping -M do -s 1464 -c 10 86.64.145.147 PING 86.64.145.147 (86.64.145.147) 1464(1492) bytes of data. 1472 bytes from 86.64.145.147: icmp_seq=1 ttl=56 time=56.0 ms --> So mtu is 1464 (+8 ?) on windows : ping -l 1464 -f 86.64.145.147 Envoi d'une requête 'ping' sur 86.64.145.147 avec 1464 octets de données : Réponse de 86.64.145.147 : octets=1464 temps=54 ms TTL=55 ping -l 1465 -f 86.64.145.147 Envoi d'une requête 'ping' sur 86.64.145.147 avec 1465 octets de données : Le paquet doit être fragmenté mais paramétré DF. --> Same MTU 1464 Same thing on the websites i cannot access Haha, this issue is starting to make me crazy ! -- Guillaume -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org