Neil Kemp wrote:
Good Morning. I have a query which I have been racking my brains about, and
was working on until midnight last night. Driving me mad !!!!
I am at a customers site who has an existing 4.1 firewall with a mail relay
server in the dmz (192.168.100.2 using interface 192.168.100.1) and relays
mail to an internal exchange server which is ip address 172.17.3.22/16. the
connection for this is routed across the firewalls interface (172.18.6.1/24)
to an NT server acting as a router (172.18.6.45 to 172.17.1.112/16) and
reaches the exchange server no problem.
The exchange server has a default gateway of 172.17.1.109 and a static route
had been created for 192.168.100.2 to route through 172.17.1.112.
Everything works fine.
However, when I replace the firewall on the network, built pretty much the
same (same IP addresses etc) the only way I can get a connection to the
exchange server from the Mail relay server is to change the default gateway to
route back through 172.17.1.112. Using its current default gateway and a
static route back to the mail relay just does not work - it reaches
172.17.1.112 and seems to get lost in the ether.
When the connection is forwarded 17.17.1.112 -> 172.18.6.45 -> 192.168.100.2
Is their a static route on the firewall accepting 172.18.6.5 forwards to 192.168.100.2?
The firewall is NG FP3, running on Windows 2000.
Internet access, mail outbound ( from the exchange server to the mail relay
server then onto the internet ) works perfectly. So the static route works on
the exchange server itself, it just seems to have a problem in replying.....
As I said, it has been driving me mad, and cant see the wood for the trees.
Any help would be greatly appreciated.
Thanks.
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