We have noticed that linkwall does not block sites if you use the IP address rather than the DNS name. For example in the linkwall.lst file Poker.com - The home of online poker games, rules & tournaments will block that site but not the IP address of the site which can be obtained by dns lookup.

Rules placed in the BM acl list in nwadmin do block the corresponding IP address.

Does anybody know if this is working as designed - it doesn't really provide much protection this way.

Many thanks