I have been trying to block access to specific websites on a client's 2811 running C2800NM-ADVENTERPRISEK9-M, Version 12.4(24)T.
I initially tried using ACL but the sites just keeps coming up. I followed instructions on this link http://articles.techrepublic.com.com/5100-10878_11-6115879.html, created the ACL, searched as much as i could the IPs linked to the domains I want to block, and then applied the ACL in the outbound direction on the WAN interface, but still no luck.
I was trying to use the SDM to configure the firewall, but i ended up blocking HTTP access to all websites :-(
Any advice will be much appreciated.