On May 25, 2010, at 4:19 PM, Gipukan wrote:
He
telnet 41.220.212.x 25
Trying 41.220.212.x...
Connected to 41.220.212.x.
Escape character is '^]'.
Connection closed by foreign host.
Doesn't look like a firewall issue to me. It would have timed out on
the telnet in that case. This looks like the server is the one
dropping the connection. Can you actually verify that the server is
listening on the external ip on those ports with
netstat -an |grep LIST |grep 25
Sometimes you may find that its listening on only the loopback, thus
why it seems to work fine on the localhost but not on the other
interfaces.
Once I experienced a similar issue because someone had mistakenly
turned on V6 on the machine in question so while it was listening, it
was just not talking the same language :-)
Noah.
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