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[vgorey]

We are using TCP Pro 5.1.26 and need to extend the initial connection timeout. We have changed to a new Linux server that is authentication SSH connection against Active Directory.  This initial authentication sometime takes 10 seconds and the TCP Pro drops the connection before the authentication finishes. Is there any way to extend this initial timeout period?

[Bob]

We are using TCP Pro 5.1.26 and need to extend the initial connection timeout. We have changed to a new Linux server that is authentication SSH connection against Active Directory.  This initial authentication sometime takes 10 seconds and the TCP Pro drops the connection before the authentication finishes. Is there any way to extend this initial timeout period?

There isn't a way to extend the connect timeout.
Why does it take so long?
Sounds like something in the chain of authentication is trying to do a reverse DNS lookup. Try finding that and disabling it or add your non-routable client PC's IP's to your local DNS (or hosts file on the machine that's causing the delay).

Typical is something like:

192.168.0.1 unroutable1
192.168.0.2 unroutable2
.
.
.