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Smart Hub Pro - weird port forwarding problem

Saccheri
Investigator
Investigator

‎03-11-2024 10:50 PM

Hi. Just moved from BT to EE with the Smart Hub Pro. A set-up which was working on the BT router, doesn't on the Smart Hub Pro.

The Smart Hub Pro connects to a switch, behind which are two computers. One is a web server and port forwarding rules are setup. From outside the network, everything is working fine - I can connect via my domain name and hit the web server. So port forwarding is working fine.

However, inside my network - the second computer connected to the switch can't connect to the web server using the domain name. I can connect using the raw internal IP address. 

Now if I take this computer and plug it directly into another port on the Smart Hub Pro (so no longer going through the switch), I can connect to the web server using the domain name! I've tried lots of switches, managed and unmanaged (to try and rule out any physical port isolation going on) but the behaviour is consistent. 

My OCD hates the idea of using raw IPs inside the LAN and domain names outside or running a second cable from the office to the hall - have a missed something basic? 

Thanks

0 Helpful
10 REPLIES 10
Saccheri
Investigator
Investigator

‎09-11-2024 05:00 PM

If the computer making the request and the end server were on different physical LAN ports at the back of the Smart Hub Pro, then things worked (or if the client PC was on Wifi). Only when they share the same physical LAN port with a (downsteam) switch, then the packets got dropped.

Maybe I messed something simple up. Tried many switches - managed and unmanaged - same behaviour which to me seemed to point to the Hub. 

But then this new, fancy firewall appliance had the same behaviour as well. Maybe old routers just were more tolerant. Seems this problem is reported weekly on the OPNsense forums with more modern kit.