TRENDnet TW100-S4W1CA User Manual page 50

2-5-4 DMZ (Demilitarized Zone)
If a local client PC cannot run an Internet application properly from
behind the NAT firewall, open the client up to unrestricted two-way
Internet access by defining a PC as a virtual DMZ Host. Up to 5 clients can
be mapped to specific public IP addresses. Multiple DMZ entries only
apply if you are using a static IP address from your ISP and you have
multiple static public IP addresses assigned by your ISP. To add multiple
static public IP addresses, click on WAN > Static IP and check the box that
says "Yes" under "Does ISP provide more IP addresses".