do any routers allow blocklist importing?

[bledd]

like a hosts block list or an adblock one?

 

[fumbles]

My netgear one can block sites with a user specified list. Not sure if it can accept wildcards or not...

My cisco only does # ip route [source] [mask] Null0, which blocks the ip address.

I think there are quite a few that do one of those, as for an Adblock type rule, wouldn't know. You could build you own router box thing with clarkconnect or some other linux based distro.

 

[eXor]

WRT54GL. If you put something like OpenWrt on it, you have a huge amount of flexibility. With iptables you can block all and selectively allow and vice versa.