Hi all,
we have a strange problem with one of our firewalls. After we upgraded the firewall to version 4 (we reinstalled the whole system and loaded the backup) we are loosing all packages between eth0 and eth3.
eth0 172.xx.5.1 netmask 255.255.255.0
eth3 172.xx.3.1 netmask 255.255.255.0
If I for example ping from one host in the 172.xx.5.0 another host in the 172.xx.3.0 the packet is going in to eth0 but not out on eth3 and the packet is not being dropped. For debugging purposes I installed tcpdump on it.
The hosts are even not able to ping the firewall it self from other networks or over the VPN it's working.
But now to the really strange thing, you're able to connect to everywhere else even to the internet from all hosts in this networks.
We checked every logfile, tried another network interface, but nothing helped. Befor the update to version 4 everything was working fine.
We're now out of ideas. [:(]
Has anybody a clue what it could be?
Thanks a lot,
Nils
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