John Von Essen <j...@essenz.com> writes: > I recently go a Linksys home wifi router, by default it enables ipv6 > on the LAN. If there is no native IPv6 on the WAN side (which is my > case since FiOS doesnt do v6 yet) the Linksys defaults to a v6 tunnel.
Could this be a 6RD tunnel requested by your ISP using DHCP with OPTION_6RD? Ref RFC5969 Setting up any tunnel to some pre-configured endpoint by default does not sound like a good idea.... But DHCP on the WAN side is "trusted", so configuring a DHCP requested tunnel by default is reasonable. > For the first few weeks of using the router, I had no idea alot of my > traffic was going out via the v6 tunnel. > > Then I started getting random reachability and availability > issues. Google would not load, but Bing and Yahoo would, and so on. I > thought it was a FiOS issue, but after digging, I discovered the v6 > tunnel, disabled it and all my issues went away. > > I dont know what Linksys uses for the v6 tunnel because its buried in > the firmware, but any tunnel service is vulnerable to a variety of > issues that could effect access. Its odd that it always effects > Windows update all the time, but who knows. It would be great to have more details about this default tunnel setup. Can't you sniff the traffic? Anyway: Thanks for yet another argument for native dual-stack. Avoiding such unwanted tunnels is really simple: If you're an ISP: Offer native dual-stack to your Internet access customers. If you're an Internet access customer: Request native dual-stack from your ISP Problem solved. Bjørn
