59 An unexpected network error occurred

Hi everyone,
This is a strange one.
We are using a TMG for a VPN (amongst other things such as web publishing etc)
We are using some software called 2X to connect to something on a part of our network, internally this works ok, but users on our VPN cant connect to it, but they can connect to everything else. 2X is a program that connects on port 80.
From the VPN we can ping the host that the 2x software connects to, we can even RDP to the servers the 2X software is pointing to (once we set up a standard 3389 rule for this) but it wont work as it should via port 80. Its something to do with
this port 80 connection.
In TMG logs we get - 59 An unexpected network error occurred.
I have tried a block and allow rule, in various orders but cant get it to work.
Any ideas ?
Thanks

Hi,
If I understand correctly, the VPN users cannot connect to the 2X software via port 80 as something else is
using port 80, right?
In addition, there would be multiple reasons for system error 59. Would you please provide the entire error
message or other related information in TMG logs? I would appreciate it if you can also share the publishing rules or other rules on the TMG server for us.
Based on my experience, TCP port 80 is often used by HTTP. You can run “netstat -ano” at the command
prompt on the server which hosts the 2X software to find PID which is using local port 80. Then based on the PID, to find the related process in Task Manager.
Best regards,
Susie

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