Looking for suggestions on how to find the cause of tcp communication failures.
I have some systems running "behind" a DomU SG UTM Firmware version: 9.714-4 on a XCP-ng 7.6 hypervisor with an AMD Opteron 6220 CPU. Everything works fine. Specifically, my backup software is being NATed through the UTM.
When I migrate the UTM to a XCP-ng 7.6 Hypervisor running on an AMD EPYC processor, the same TCP backup traffic drops the connection. The ONLY change is moving the UTM to the new hypervisor.
If you see any lines in the UTM firewall log related to the unsuccessful communication, please copy and paste a few here.
Cheers - Bob