Recently I had to reinstall my home router, this was and old woody dist-upgrade to sarge with a 2.4.27 kernel. I've a privet network 192... for a couple of Windows and lynux boxs.
The machine crash and I only backup some config files and the data partition.

After installing a brand new sarge with update package and the precompile kernel 2.6.8. I began to notice that there where some troubles connecting to some www sites, from the windows boxs. Especially sites like www.mininova.org or www.astalavista.com couldnt be access at all, or the connection would take long and hang. Some times the page would half load, and making a reload of the page it could eventually load most of it.
At the same time if I try to load that same page with lynx from the router it would load fast and without any problem.
The iptables configuration is simple and work fine untill the upgrade:

bane:~# iptables -L -t nat
Chain PREROUTING (policy ACCEPT)
target prot opt source destination
DNAT tcp -- anywhere isp.provider.com tcp dpts:6881:6999 to:192.168.0.3:6881-6999
DNAT tcp -- anywhere isp.provider.com tcp dpts:10000:60000 to:192.168.0.3:10000-60000
DNAT udp -- anywhere isp.provider.com udp dpt:4672 to:192.168.0.3:4672
DNAT tcp -- anywhere isp.provider.com tcp dpt:4662 to:192.168.0.3:4662

Chain POSTROUTING (policy ACCEPT)
target prot opt source destination
MASQUERADE all -- anywhere anywhere

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

I google arround but found nothing about it, some references about net.ipv4, in kernel 2.6, but the config wos ok.
Did any one els here something similar to this problem or have any idea what could be wrong.