Hello,
I've got a problem with one of my ISPs that I'm 95% sure is on their end, but I want
to get some opinions of the experts here, and know what exactly to tell them.
Scenerio:
Mandrake 7.1 Box with two ethernet cards, one on ISP #1 (DSL), another one on ISP #2
(T1). Default route is set to go out to the T1.
Situation: When I ping the DSL IP address of my box, the reply gets sent back thru the
T1. It works everywhere BUT within ISP #1's system.
In other words, if I try to access my box's DSL ip address from another DSL line, it
fails. When looking at my box, I can see the packet coming in, and the reply going
out to the T1, but that reply packet never gets back to the other DSL line. It's like
the DSL provider is filtering the return packet, because it isn't coming from the
address it was initially sending to.
This holds true for all services - http, mail, etc. The DSL line has NO firewalling
or NAT on it, so they say. The kicker is that everything works fine on everyone
else's network, just not the DSL's system!
Also FWIW, if I make the DSL line the default route, all is fine, including within the
DSL network.
Is there a way for return packets to be handled differently?
How can I explain this to my DSL ISP so that they won't dismiss the problem as a
"Weird configuration on the user end"?
Bob
P.S. the IP address in question is: 64.65.206.24
