ZyXEL - Router Setup (Public IP Range)

Problem

You have a ZyXEL router (In my case a P-600R-D1) and you want to put a device behind it with a public IP.

Note: I'm assuming you have agreed with your ISP that you will receive a range of public IP addresses. With most ASDL packages the first IP in the range usually gets allocated to the router.

Solution

1. Connect up to the router, and you should get an IP address from it, open your web browser and proceed to http://192.168.1.1 the default password is "1234"

2. Once you have entered the ADSL details provided by your ISP, and changed the password,you need to go to advanced setup.

3. Disable NAT: Select NAt > General > Un-tick "Active Network Address Translation (NAT)" > Apply.

4. Disable DHCP: Select LAN > DHCP Setup > Change DHCP to "None" > Apply.

5. Set the inside IP: Set this to the IP address allocated to your Router - (Note: this may be the SAME as the address allocated to the outside IP, don't panic it will not conflict (NAT is disabled).

6. You can now connect your internal device/firewall (Note: You may need to reboot the device AND the router as the MAC address will have changed.)

Factory Reset ZyXEL Router

If things break and you want to reset the router,

1. Power off the router.

2. Depress the reset button on the rear of the router.

3. Power on the device until the ethernet light, lights amber.

4. Now DHCP will be turned on the router will use 192.168.1.1 internally and the default password will be reset to 1234.