We have an ISA box that is a DHCP client of an ISP. When initialized, we are able to retain a lease via none of the firewall services are started. Upon expiration and during previous failed renewal attempts, no communication can be made with the external DHCP server. We tried to replicate the tutorial on isaserver.org as best we could, but it seems as if the cable modem is internal, not external like ours. Hence we can't follow all the config steps, ie reg hack etc. We have the DHCP packet filter enabled, have changed it to apply to default external IP and moved the dhcp server address to any external server. Still no luck. Can anybody please help who has had the same configuration issues and has solved them? Thanks in advance Brian Jeppesen Consultant 602.820.5305 <mailto:bjeppesen@xxxxxxxxxxxxxxxxxxx> bjeppesen@xxxxxxxxxxxxxxxxxxx