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TCP port on remote driver

Posted: Mon Mar 29, 2021 3:16 pm
by user_kim
Hi,

I want to install a remote driver with an OPŠ” client on a third-party server. So they ask what TCP port the remote driver is using, to open it to me?

I tried to simulate the situation.
On the server side, I used port 5678 for WinCCOA Proxy and it does enable / disable access.

But enabling/disabling the firewall(with no exceptions) on the remote driver side does not affect access to the server in any way.
The connection is not blocked at all.

It turns out that all TCP ports can be blocked on the remote driver side? How it works?

Re: TCP port on remote driver

Posted: Tue Mar 30, 2021 9:33 am
by leoknipp
Which TCP port are you talking about?
The communication between the WinCC OA OPC client and the WinCC OA server?

Best Regards
Leopold Knipp
Senior Support Specialist

Re: TCP port on remote driver

Posted: Tue Mar 30, 2021 1:17 pm
by user_kim
It doesn't matter which driver or manager is running on the remote computer. I've tried with different drivers.
I turn on the firewall on the remote computer, but it does not block the WinCC OA managers.
They also successfully connect to the WinCC OA server.
So I'm wondering how it all works.

Re: TCP port on remote driver

Posted: Wed Mar 31, 2021 12:10 pm
by leoknipp
Normally a fire wall blocks incoming traffic on incoming ports.
Maybe you should check the settings in the firewall again.

Best Regards
Leopold Knipp
Senior Support Specialist

Re: TCP port on remote driver

Posted: Wed Mar 31, 2021 1:37 pm
by user_kim
My mistake. I thought if you turn on the firewall, then all ports are closed by default and you have to open those that are needed. But it turned out to be wrong, you need to block all ports yourself, except for certain ones (in my case 5678 for WinCCOA Proxy).

Thanks

P.S. We are talking about outgoing traffic. Since the remote driver starts the connection.