Le 03/11/2017 à 12:51, Pol Hallen a écrit :
What manages the wan interface ? /etc/network/interfaces,
statically with /etc/network/interfaces
Then I wonder how the modem knows you rebooted.
Can you show the file ?
Did you try with DHCP ?
NetworkManager, other ?
I don't have X
NetworkManager does not depend on X.
Which server ?
debian 9.x
my server has 2 network interfaces
Is that "server" the machine which is connected to the modem ?
Isn't it rather a router than a server ?
What does it mean exactly ?
that, suddently internet goes down...
Not very helpful. What does it mean that "internet goes down" ? This is
a user experience, not a technical fact. We need technical facts.
routing table is ok
Can you show it with ip route ? Also the output of ip addr.
Can you still reach (ping) the modem from the router ?
sure
So it is not a connectivity problem on the ethernet link.
What is the output of "traceroute 8.8.8.8" from the router ?
none
Really nothing ? Not even the first hop reply from the modem or an error
message ?
Did you run a packet capture program such as tcpdump on the interface
connected to the modem to see what is going on ?
