I havea firewall with shorewall-4-4.17 on Ubuntu 11.04
A system behind that firewall worked well (gets its DHCP params from a DHCP
server in the same FW zone fo the system just mentionned, the system gets
always the same IP, based on tis MAC address, it's configured that way)
Now I changed the DHCP config so the system gets a different IP (still an
IP in the same subnet and also in the same
firewall zone as before). Rebooted, OK the system that new IP.
But I can't ping anymore to IP addresses which are not in the same zone as
my system.
ping just hangs and times out...
So, I also can't do DNS queries any longer (nags and times-out)
(the DNS servers I use are in zone 'net' and in a totally different subnet)
I believe somewhere something in a cache on the firewall still has old
information, but I have no clue
where or how to clear that cache
what can be the reason and how to solve?
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