Belkin f5d7630 firewall/wireless router/4port router. Voyager is obviously plugged into one of the 4 ports (have given it a static IP as saw some forums talking about issues with DHCP). BT gave me 32000-36000, 5060, 2727 & 49152-49193 as the incoming ports. Have tried to stick these in various places & either the Voyager fails to connect to BT Broadbandtalk (happened when i tried to put the ip address into a DMZ), or I lose connectivity from other devices & Voyager still doesn't work on inbound. Belkin logs do occassionally talk about a UDP storm on port 491** so maybe firewall is still blocking ?