DNS lookup problem with up2date / yum

[Juergen Krauss]

Hi,

I want to use Fedora Core3 behind a dlink DSL-504T dsl router.

Installing fedora was a breeze, however, internet connectivity is not
straightforward due to several IPV6 related issues.

After giving my fedora box a static (local) IP and turning off IPV6 in
/etc/modprobe.conf I can surf the net with firefox,
but using lynx or trying to update via yum or up2date times out. 
Looking at ethereal captures when running yp2date, lynx or yum, there
are ipv6 dns queries (AAAA ...) 
which are resolved as address 1.0.0.0, and that obviously times out. It
seems to be a bug in the DSL-504T,
but would one solution be not sending AAAA requests, or translating them
to ipv4 requests (with iptables? I am new there)? How can I do that? 

Any help with this would be greatly appreciated.

Juergen