How to find all relevant ports for forwarding for SIP-calls, using Flint2?

[Johannes_85]

Hi there.

I’m using a Cisco SPA-3102 VoIP router together with my Flint 2.

I looked up all relevant ports in the user manual and set the rules in the “port forwarding” option in the router configuration.

However, if I’m not allowing a DMZ for the VoIP Router, the calls are not working.

I tried using wireshark to scan to open connections in the wlo1, which should be the WIFI-connections.

There are however (logically) only the connections from my notebook to the VoIP-router, as they are using the WIFI.

How could I find the connections, affecting incoming and outgoing VoIP calls and the affected ports, in order to close the DMZ and use port-forwarding only?

[xize11]

Usually you either get the ports by the isp or the provider you get voip from.

I have used a voip station like the gigaset N300A in the past and found it easier because it removes the need for port forwarding because it already uses hole punching by first contacting the voip service, then what goes inbound goes over the same line.

On wifi you may also want to use multicast to unicast which is a checkbox in the advanced settings in luci when you click network and then wireless.

[Johannes_85]

Thank you very much for your input.

The Gigaset would have indeed been the easier option. And not a lot pricier, too.

I hope as I fixed the issues for the moment, my parents in law can use their beloved landline for the next time without issues.

Multicast to unicast I couldn’t find directly as an option in luci however.

I searched a bit and came across the udpxy app for luci. Should do the job, but requires a bit of configuration.

[Bogmonster]

Ha, I am trying to wean my wife off the landline…we have been using gigaset VoIP base stations for years and they just work with zero hassle. The handsets are finicky about charging properly but we are going off topic. What I was really going to say is we have just migrated to using the Groundwire sip app on our smartphones. This works really well and has proven reliable. It uses push notifications so doesn't have a big phone battery life impact. Again, these just work wherever you are. Our gigaset units are redundant now, less boxes plugged in and fewer wires. It's also cost effective (assuming you have a smartphone) with a small one time purchase. Just need to make sure smartphone is charged regularly. I know this was a bit off topic but thought it might be of use to someone else who stumbles onto this thread. I know some folks will baulk at using a smartphone but my wife is now a convert and finds it more practical overall.