You can download 3.23 from here:<br><br>ftp://ftp.zyxel.com:21/public/prestige/p310/firmware/3.23/p310.zip<br><br>worth a try.<br>Also, with SUA set to forward all packets to a default LAN Ip, you will have trouble. You should allow the firewall to respond to ping requests and only use NAT/SUA for specialized apps.<br><br>