Installed LnS several weeks ago and no issues with my w2k or linksys BEFSR41. I then started using the enhancedruleset and no problems. But today, I tried running WallWatcher to log the traffic in / out linksys and blank, recording nothing. I closed LnS and WW started to run ok. rule seems to relate to blocking any UPD (not otherwise allowed). must admit I have not spent much time tweaking the rules because I did not need to. I've written rules in past for kerio 2.1.5. anyone familiar with WW & LnS, that can advise which rule to tweak and how, or what rule to add, or specific guidelines to pinpoint what needs to be tweaked.