IPV6 & Toredo = bad DNS?

[drjohn999]

Purchased a new Dell Lat D610 w/ XP Pro SP2. When connected via Wingate, trying to browse the net is very slow. Gatekeeper shows bursts of "DNS: Unknown lookup - <URL>" messages for the laptop, and eventually it finds the website and the page is loaded. On average it takes about 1 minute to find yahoo.com from starting IE6.

This laptop is a Wingate VPN unit, however this problem occurs regardless of the state of the VPN (on / off/ connected). If I dial up a connection and connnect to the VPN from outside, I still see the same barrage of unknown DNS lookups.

My other, slightly older Lat D600 has no such problems, nor do the other two desktop PCs, all of which also run XP Pro SP2. The main difference being that the newest laptop came w/ SP2 installed and the others had the SP done post install from the CD SP1 images and none of which run IPV6.

Looking at offending D610's ipconfig /all, the infamous (from my point of view) Toredo tunnels are there complete with cryptic DNS server addresses such as fec0:f:f:ffff::1%2 (can a normal person understand ipv6 addresses??). The Toredo tunnels sit on both the wired and wireless interfaces.

It seems to me that depsite MSoft's assurances that ipv6 packets can tunnel thru or around an ipv4-style NAT (like Wingate I assume) using specially crafted ivp4 UDP packets, it looks like this isn't happening, or if it is then it really doesn't work well for my situation.

So, my question is short of removing ipv6 (merely unchecking the IPV6 entry for each adapter doesn't get rid of the Toredos) and rolling back to ipv4 on the new laptop, or maybe removing all the net components and reinstalling what's really needed, is there something else I can do in Wingate that would clear the way for it?

Thanks,

DrJohn

[drjohn999]

Addendum: I removed the IPV6 protocol, and now all is fine -- the Toredos had left. But I'm still curious whether this is a NAT proxy problem, a general problem, or a problem that was specific to that laptop.

-- DJ

BTW -- Toredos is the name of a type of marine wood-boring worm. Hmmmm... :>