Tearing my hair out here. I am going through the process of setting up access filters in my modem/router - a Linksys WAG345G. I've successfully added a p0rno filter, complete with a list of choice words that are to be spotted and blocked. It's working fine. The browser instantly returns a 'connection dropped' message.
However I am now trying to repeat the process for YouTube. (It's easier to block it at the router rather than OpenDNS, as we want to be able to turn the block off when our son's not using the computer).
However it won't block by URL or by keyword. The attachment is a PDF of the relevant page from the router setup. The contents of the 'edit list of PCs' button is identical to the one created for the 'No Porn' filter. I can't think of a reason why it works for one but not the other. Am I missing something horribly obvious here?