I’m currently using another company’s load-balancing router.
On the LAN side, I’m running a Mac OS X 10.8 Server that’s running iMessage (which is Apple’s brand of Jabber/XMPP). Although this router advertises that it has Universal Plug & Play, iMessage is not working properly - text chats are OK, but file transfers fail.
I’ve read Apple’s documents: http://support.apple.com/kb/HT4245?viewlocale=en_US&locale=en_US and tried lots of variations (UPNP on or off, Port forwarding various ports, even NAT DMZ) : nothing worked.
If I remove the $Cheap_Router and put the Apple Airport Extreme back in, then iMessage file transfers work again.
My working hypothesis is that the UPNP service of the $Cheap_Router is not working properly (or perhaps it’s not working up to what Apple OS expects? ).
My question for the Peplink folks - do the Balance series routers offer UPNP? And, has anyone out there actually tested this setup : running an OS X Server iMessage/Jabber server on the LAN side and seeing if file transfers work to chat clients on the WAN side?