Business Smart Hub 3, 1 Static IP, Server, Hybrid Connect problem

[satsig]

3 weeks ago we upgraded from Wired and BTBHub 6 to Full Fibre FTTX 3  and Business Smart Hub 3.

 Works well on FTTX (Internet access good and server traffic down/up good), but during tests of the Hybrid Connect internet access is good but no incoming traffic to the server. The public Static IP address moves across as expected and a remote trace route gets to our public IP address.  Any ideas why no incoming traffic to the server during these "Resilience events".  We've lost a total of more than 90 minutes service over last 3 weeks testing and waiting for the 15min timeouts and don't want to do more tests without some good ideas of what needs fixing. Please help.

[BethM]

Hi satsig

Is it just this one server that isn't working?

[satsig]

There is one Firewall PC on 198.168.1.94, wired to one physical server at 192.168.2.90.

Multiple virtual web sites on the server are all working well during normal FFTX operation. All web sites have their DNS pointed at our static public IP address.

The problem is during Hybrid Connect failover during which traffic to/from the server fails. During failover, the Hub manager showed our (correct) public IP address and a remote traceroute to our public IP address worked OK. Access to the internet by any local PC was good.

BT Business Smart Hub 3 has local static IP .94 with same to same port forwarding rules 22, 80, 123, 443, 4444.

*** All worked well with the old wired BT Business Smart Hub 6 Type A + 4G Assure backup. ***

Good ideas as to what might be wrong would be appreciated. I wish to avoid trial and error attempts, based on pure guesswork, each of which will involve a long 15 minute outage?