On Wed, 2005-12-21 at 13:36 -0500, Derick Anderson wrote: > After reading the ICMP state machine section of the Netfilter tutorial > [http://iptables-tutorial.frozentux.net/iptables-tutorial.html#ICMPCONNE > CTIONS] it appears that ICMP traffic related to existing TCP and UDP > connections falls under the RELATED,ESTABLISHED rules. > > So someone correct me if I'm wrong, but this means that any valid ICMP > error message would get picked up by a '-A FORWARD -m state --state > RELATED,ESTABLISHED -j ACCEPT' at the start of the chain, and so (as > lst_hoe01 stated) allowing type 8 is all you really need to do, correct? > (and a little reading goes a long way... =) > > Thanks, > > Derick Anderson > > Somewhere I recall Microsoft documentation asking that all ICMP traffic be allowed for Active Directory. I never bothered to find out what exactly was needed and why. Does anyone know if a properly functioning Active Directory needs anything other than echo? - John -- John A. Sullivan III Open Source Development Corporation +1 207-985-7880 jsullivan@xxxxxxxxxxxxxxxxxxx If you would like to participate in the development of an open source enterprise class network security management system, please visit http://iscs.sourceforge.net
