Slow internal browsing

I am having a problem browsing my domain from my internal network. If I
point to my url from anywhere outside of my house, the pages load very
fast. However, if I go to the site from anywhere inside my house (on the
network) the site loads quite slowly.

I've tried modifying the host files on the windows machines, but that
doesn't help (like adding entry for 192.168.0.x www.domain.com).

I've been to the library, work, friends houses (even ones on dial up) and
the site loads fine. Not at home though. Also, any other website (other
than my own) loads just fine. THere are no problems with loading any other
large content site. Anyone seen this type behavior before?


info:

Apache-AdvancedExtranetServer/2.0.47 (Mandrake Linux/6.3.92mdk)
mod_perl/1.99_09 Perl/v5.8.1 mod_ssl/2.0.47 OpenSSL/0.9.7b PHP/4.3.2