/sbin/dproxy -c /etc/resolv.conf -d
This is from memory; I think it's the correct incantation, but check first. Yeah, the G604T is running Linux.
However, upgrading the firmware fixed the dproxy deaths, but brought on another issue: now the router would regularly drop both the WAN and LAN connections for no discernible reason. I haven't had time to get to the bottom of that one yet, and just swapped to a Dynalink modem that arrived from Woosh.
Hmm... the Cisco 827 never behaved like this, nor the Nokia M10/M11s.