On Mon, 29 Oct 2007, Brandon S. Allbery KF8NH wrote: > On Oct 29, 2007, at 17:49 , Juergen Schmidt wrote: > > >- if you set it to "Block all incoming connections" it still allows access > >to certain system services. We could access the ntp daemon that is running > >per default over the internet. In a LAN based scenario, we were able to > >query the Netbios naming service even with full blocking enabled. > > The firewall in Tiger, and presumably Leopard, only affects TCP services by > default (you can enable UDP filtering in the Advanced settings). So no change > here from the status quo. Nope -- the behaviour we observed did not depend on the protocol by any means. For example we were able to connect to a netcat server listening on a TCP port despite of "Set access to specific services and programs" and an empty list of allowed services. There is no way to "enable UDP filtering" in Leopard either -- at least I have not found any. In fact the firewall does not use ipfw rules at all. bye, ju -- Juergen Schmidt, editor-in-chief heise Security www.heise-security.co.uk GPG-Key: 0x38EA4970, 5D7B 476D 84D5 94FF E7C5 67BE F895 0A18 38EA 4970
