WCF Discovery problems Windows Server 2019

Renatus, Johannes - SAXOPRINT 1 Reputation point
2021-03-15T11:04:33.28+00:00

The problem: I've installed Windows Server 2019 and I am trying to discover my WCF services running on a Windows Server 2012R2. But that's not working and in Wireshark I see a ICMP Destination unreachable (Port unreachable).

My current Infrastructure

We have some old Windows Server 2012R2 where the WCF Services are running and when I try to discover them from some other Windows Server 2012R2 that I can discover them without any problems.

The Windows servers are all installed on virtual machines which are all in the same network and no firewall is between them, the windows firewall is disabled with group/domain policies.

I've installed wireshark on my Windows Server 2012R2 and Windows Server 2019 and on both machines I see for the UDP Multicast request for discovery an ICMP entry with Destination and Port unreachable.

77734-grafik.png

As far as I know the ICMP message shows me that there is a problem, but I am not shure how to read it right. Where is the problem is the Source multicast port 3702 not reachable or the other port 65116? Is the problem on my Server or Client?

Do I have to activate oder deactive a specific feature on my Windows Server 2019 to get this running?

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Microsoft Technologies based on the .NET software framework.
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Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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  1. Renatus, Johannes - SAXOPRINT 1 Reputation point
    2021-03-18T14:01:09.183+00:00

    Solution: Problem was that the "Function Discovery Resource Publication" Service needs to be running and it was stopped after domain join. After starting this service its working again.

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