"Independent mapping, Independent Filter, random port, no hairpin"

[scottpbutler11@gmail.com]

I am setting up my firewall (Sonicwall NSA4500) to work with JamKazam and I am receiving this error.

I have specified "same set of UDP ports" starting at 12000 in the client on my PC
I have poked a hole in my firewall allowing UDP ports 12000-12010
I have set up NAT to forward UDP ports 12000-12010 to the IP address of my PC.
I have checked "Enable consistent NAT" under VoIP options (per some KB I found while googling this problem)

And yet my network test always fails.

What have I missed?

I am in the same situation as agrikk in terms of network test failing and I am also behind a SonicWall TZ400 router.

I have had quite a bit of experience in the networking world and what I am missing is how Jam Kazam really works with networking.  I have seen lots of try this or that but no discussion of how it works.  For example:

- Does the client always initiate the connection to the server?
- And/or do the jam kazam clients to directly to each other?
- Do I need to allow incoming connections or are just outbound OK?
- What ports does Jam Kazam use?
- Can I specify the port(s) it uses and if so how?
- What do the nebulous networking errors really mean? (can't connect to the following IP XXX on the port YYY, etc.)
- It would be nice to have the networking test be able to be run outside of a session and give the user more information of the specific issue

It seems to me that most users but be in some kind of a NAT situation with a firewall.  That is definitely my setup.

I guess I could try to use a tool like Wireshark to figure it out but it would be nice to get the basics just documented somewhere to alleviate all of the guessing that is going on.

Please help!

BTW - I would be happy to help author a KB on how the networking works and how to troubleshoot issues once I understand how it works.