I am having a problem with an NT Server SP6 running MS Exchange.
I am trying to reach it through a firewall but it's not reacheable.
A packet sniffer shows that packets are getting received from Internet
addresses and being sent to the source address, but the packets are
getting misdirected to the wrong gateway.
The server is set up with the firewall as it's primary gateway and a
secondary gateway to a router that both links to another Exchange
server and routes traffic over a dsl line.
I have determined that the problem is that rather than routing the
packets back to the path that sent it (to the primary gateway) it's
building dynamic routes through the secondary gateway to all external
ip addresses. I can see them appearing in the routing table. When I add
a static route to the server for a particular address, it gets routed
properly and access is restored.
So....can someone suggest why the primary gateway is being ignored and
dynamic routes are being built? RIP is not running on the server. The
gateway is pingable. But all Internet traffic is being diverted to the
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