Well after spending a good half hour arguing with a first level tech and then holding for another 20-30 min, I finally got to talk to a senior tech. I have to give him credit. My experience with outsourced support is usually pretty bad (as was this one until I got to talk to the senior tech). To his and Linksys' credit, he took the time to listen to me, and actually did some online searches of his own. After doing a little homework, he told me something that hasn't been mentioned here. If you have the DDNS server active, every time you hit the save settings button on ANY page of the router GUI, it refreshes all of the settings - which includes re-updating DynDNS even if the IP address hasn't changed. The 54G/L series routers didn't do this. Given the fiddling I have been doing with this thing over the last several days (playing with the NAS feature), I've been saving the settings a LOT. So if what he says is true, it might explain the DynDNS blocks I've been getting.
I have a case number now, and tonight we're trying an experiment. I locked down the settings 7pm, and I'm going to let it sit overnight. It's been almost 4 hours, and DynDNS hasn't been updated - and more importantly, I haven't been blocked. There has been some speculation that the unit is updating when the 6 hour lease runs out, and if that's the case, I should be able to see it. If I make it through the night without any updates or getting blocked, I think I'll be fairly confident that the problem is understood. If that's the case, I'll just make sure I turn off the DDNS client whenever I'm fiddling.
If I get blocked overnight, the tech asked me to call back with the case number and he'll open a bug report.
Just thought you'd all like to know.
Mike
