Not having seen this - I updated the ticket by sending a new - small - router log.

Last week this was working fine with a pretty "stock" router config.
No ports forwarded.
SPI Firewall enabled.
Ports 5062 and 5079.

Now I'm seeing 5061 and 5079.
Coincidentally, perhaps, with the datacenter/latency issues, it started failing again.
I forwarded ports. No love.

For the log file - the SPI was disabled and no ports were forwarded.

Unfortunately, I don't have a sniffer to capture packets. But I'll do whatever diagnostics you want.

If we really believe that the router is the issue - intermittently or regularly - I can retrieve my 'old' WRT54GS and set it up as the internet router, and hang the PAP2 off it, with my WRT610N as an internal router, and a static custom route from the 54 to the 610N. It's a PITA, because I have N devices that I need - but I'll do it.

If that resolves the issue - somebody needs to beat Cisco/Linksys with a very big stick - 'cause that means as more people go to their higher end "n" routers you're going to see a lot of unhappy customers...

Let me know how you want to proceed.