Hi Liam, far from a out of the box install and learned by failure after failure!
Background Scope:
I wanted to be able to video meet clients using my existing hardware, ISP and as much open source software as possible without any additional downloads client side.
Hardware:
Dell T300
Dual Quad core Xeon @ 2.50GHz
Dual GB Nics
24570 MB Total Memory
OS:
XenServer 6.5
System OS:
Windows Server 2012 R2 SP2 Enterprise
1 Dual Core allocated CPU
8 GB allocated memory
Installed OpenFire 3.10.0 Beta
Installed Ofmeet 0.1.4 (Started with original JitsiBridge)
created my rooms / users
Tested working on LAN (worked fine)
Setup router for port forwarding of pertinent ports.
Tested WAN as fail, could not connect video or audio over WAN. However browser did connect to server. Important to note that I am using a dynamic external ip.
Further research and I installed the available STUN module to OpenFire. Tested WAN and received same results as above. I then consumed hours of research on these forums and found that NAT transversal was my issue. It seems mentioned many places that unless your server is "Forward facing", meaning I suppose a VPS of some sort that none of this works right. Back to research since I could not get it to work over WAN and I had NO idea what I was doing!
So to test this NAT issue theory I used a soft VPN (Hamachi) between a laptop off my lan and the server on lan and had success connecting video and audio. One step closer and I had decided that I would have to bundle a zero config vpn client that I could send clients BUT that would expose my internal network and I wasn't too keen on that. I started my research into soft vpn's and found Softether VPN by chance. Since my software environment is virtualized and I can roll back I decided to install it. Softether is open source and advertises itself as a strong VPN solution, offers a Dynamic DNS service built in and during setup said "Installing this software will punch a hole through Level NAT Transversal" (BINGO!).
Once installed on the same server as OpenFire and Ofmeet and the required ports needed all worked like a charm. Basically Softether VPN was the glue that allow the audio/video to move in and out of the server. Probably, if given the chance to spend the money in the near future I will be moving it to a cloud VPS but it works for now.
ISSUES:
Intermittent audio quality (could be client side & doesn't happen all the time)
Have not been able to screen share at all
I do not use SIP so have no experience with that side of it
Hope that helps some,
Jay