use of cient VPN shuts down SMTP Server

  • Thread starter Thread starter Mike Preston
  • Start date Start date
M

Mike Preston

When my W2kPro machine that is being used as an SMTP server accesses a
remote computer via VPN then all attempts to use the SMTP server from
_outside_ the LAN fail.

When I merely shut down the VPN connection, The SMTP server again
accepts connections from outside the LAN.

Whether the VPN connection is active or not, the SMTP server will
accept connections from inside the LAN.

The error message that my tcp/ip logs show when a mail client attempts
to connect to the SMTP server is:

15: Peer connect failure

The error message that is generated by the SMTP server is:

9: Socket write error 10054 (connection aborted by remote host)

Then the next line states the connection was closed normally.

Obviously, the Win2k VPN Connectoid somehow interferes with incoming
Port 25 from _outside_ the LAN, but doesn't interfere with it from
_inside_ the LAN. And when the email client effectively gets the
Socket error message generated by the SMTP Server's machine it then
aborts the connection.

I'm hopeful that somebody else here has experienced this same issue
and can help me get both to work at the same time.

Thanks

mike
 
What I suspect is happening is that
your VPN is configured to route all gateway
traffic through the VPN tunnel, rather than just
traffic destined for the target network.

You need to disable this. In an MS software VPN
this is a client setting in advanced TCP/IP properties.
If you are using a hardware VPN solution it is
normally a policy setting in the VPN server box.

Steve Duff, MCSE
Ergodic Systems, Inc.
 
What I suspect is happening is that
your VPN is configured to route all gateway
traffic through the VPN tunnel, rather than just
traffic destined for the target network.

You need to disable this. In an MS software VPN
this is a client setting in advanced TCP/IP properties.
Click to expand...

Steve,

Done. Worked. Perfect.

Thanks

mike
 
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