Hi I have an ipsec vpn between a Linksys befsx41 and Isa2k4. I cannot for the life of me figure out how to enable domain communications between the 2 sites. I've followed Tom's articles and still cannot get it to work. The issue seems to be with communication when requesting a certificate from the cert console...error comes back saying it cant find a cert authority.....Inside the firewall is OK...it works fine. can't do a dcpromo on the linksys site because of this either. Seriously thinking of blowing up the ISA box. Idiot Steve This E-Mail is confidential. It is not intended to be read, copied, disclosed or used by any person other than the recipient named above. Unauthorised use, disclosure, or copying is strictly prohibited and may be unlawful. Optimum IT Solutions disclaims any liability for any action taken in connection of this E-Mail. The comments or statements expressed in this E-Mail are not necessarily those of Optimum IT Solutions or its subsidiaries or affiliates. administrator@xxxxxxxxxxxxxxxxxxxxxxxxxx