When I put in the MAC addresses for the filtering they disappear after leaving the page and going back. Does anyone else have this problem? I thought it helped that I put them in all caps with colons (00:14:BF:2A:4B:16), but even that isn't helping much. (it kept two) I'm using the Linksys official 3.03 firmware. I have reset it to factory defaults and reflashed the 3.03 firmware. The filtering is in place even though the MAC addresses are not showing up in the fields. I have tried on two different computers running IE with low security settings. Thanks for the help!