Our customer (5 static IP block) had his modem replaced with a new Cisco Business Class Gateway. Our setup is Comcast Device (passing through traffic)--> RV082(WAN IP has one of the 5 statics). Before, we had an SMC device, and the RV082 could accept PPTP VPN traffic (port 1723) through the SMC without any special configuration on the SMC. Now, with the Cisco, no matter what configuration we do, our RV082 will not accept port 1723 traffic, as it seems the Cisco is blocking it somehow.
LAN DHCP is disabled on the Cisco.