said by dslcreature:Reminds me of what happens when IPv6 isn't working
I was thinking the same thing.
Before I switched to m0n0wall, I ran pfSense as my router/firewall. My first indication that something was wrong with IPv6 was that my homepage (set as google.com) would take a really long time to load.
This was probably just over a year ago now, so google was one of the first sites (there was probably others, but I know google did have) both an IPv4 IP and IPv6 IP associated with it.
However it all worked, IPv6 had priority so to speak in my network, so if there was a site that did have an IPv6 IP, it would load that way. Of course, you would never notice which side (IPv4 or IPv6) that a site was using.
But, 100% of the time, if the google main page took a long time to load (like 10-20 seconds or more), I knew something was wrong with pfSenses IPv6 configuration. Meaning that even though psSense would show (from its configuration screens), that I had an IPv6 on the WAN side, and my desktop PC showed I had an IPv6 IP from pfSense, that IPv6 IP was no longer valid.
On a side note, I think the issue at the time for me was that pfSense was not able to renew the lease on the IPv6 IP side of things, and the lease would expire. Yet, the interface pages would not show that so I really no longer had an IPv6 IP. Yet, configuration wise, things thought I did which is why DNS tried to use that first (and then fail).
When this would happen, the result was always the same. Google's long load time equaled loss of my IPv6 IP. To verify this, I had 3 sites bookmarked to test my IPv6 connectivity. They would all fail.
I would then reboot everything (Modem, psSense Box, desktop PC), which would fix the IPv6 problem, and google would then load fine.
So, as a suggestion the next time this happens, try to run any (or all) of these web pages and post your results.
Comcast's IPv6 Information Page
»
www.comcast6.net/XFinity IPv6-Readiness Test
»
www.test-ipv6.comcast.net/Test your IPv6
»
www.test-ipv6.com/The 2nd two, if IPv6 is working, should come back 10/10. In my case, when google would not load like it normally does (do to IPv6 not working anymore), they would come back as 0/10.
If that ends up being the case, then we can look at your router (Asus RT-AC66R) and make sure things are setup and configured correctly for IPv6.
--Brian