By Mistake the port against Web was changed from 80 to 1433

Who is your ISP (internet service provider)? Anyway, it is possible to get your set up working. ZyXel is the DSL modem gateway and Linksys, your router/wifi. If you are able to get online by hooking up directly to the Zyxel, then it is possible to add the Linksys to the system.
Dont hook up the Zyxel to the Internet port of Linksys just yet. First you have to configure the Linksys by connecting your PC to it with a cable. Boot up the PC.
Open web browser and enter the address 192.168.1.1 and hit enter. This is the default address of the Linksys. username = admin and no password. It is probably the same as the Zyxel which causes the conflict.
The first set up page may look something like this below.
Change the LAN IP address from 192.168.1.1 to 192.168.2.1
Then click apply...From now on the Linksys IP address is 192.168.2.1.
Now you can connect the Linksys internet port to the Zyxel. Reboot the Linksys and Zyxel.

Your PC should be on the internet after that. To check/setup wifi, you need to log back into the Linksys using the new adress x.x.2.1

Hello it depends on your router.
Read more here:

http://www.zyxel.com/support/knowledge_base/kb_detail_1850.shtml

http://www.default-password.info/zyxel/

Here is a video that shows how:

http://www.youtube.com/watch?v=19WI2dl-QU4

You might have to reset router to access the page.
Press the reset button at the back of your router for 30 sec.
and release.Wait for it to boot up again.
Now the router is set to factory settings.
Connect your lan cable to the router to one of the ports 1 to 4
and to your computer
To configure your router's wireless network open Internet Explorer and navigate to the router's configuration page by typing 192.168.1.1 into the address bar. When the page loads you will be prompted for your Router configuration password. By default this is 1234.
(You have to find the username and password first)

Try to download a manual for the router:

http://www.zyxel.com/support/download_library.shtml

Please select your model and number.

Do not use a easy password so others can use your internet connection.

Good luck

1 Make sure your ZyXEL Device hardware is properly connected (refer to the Quick StartGuide).2 Prepare your computer/computer network to connect to the ZyXEL Device (refer to theQuick Start Guide).3 Launch your web browser.4 Type "192.168.1.1" as the URL.5 A window displays
6 For administrator access enter the default admin password 1234 to configure the wizardsand the advanced features.(or if you already changed your password, enter that password)7 On the right hand side of the screen you will see a drop down menu. click on NETWORK. 8 Then click on NAT.9 Find the area to configure Port Forwarding.10 The ports that Microsoft recommends to be open are:88 UDP3074 UDP3074 TCP
It also looks like you will have to set up a static address (I was looking at the .pdf for your particular router) You can do this by editing your network setting on your XBOX console, and then using this address as your "server" address when opening the above mentioned ports on your router.
ftp://ftp.zyxel.com/P-660HW-D1/user_guide/P-660HW-D1_3.40_Ed1.pdf

1 Make sure your ZyXEL Device hardware is properly connected (refer to the Quick StartGuide).
2 Prepare your computer/computer network to connect to the ZyXEL Device (refer to theQuick Start Guide).
3 Launch your web browser.
4 Type "192.168.1.1" as the URL.
5 A window displays

6 For administrator access enter the default admin password 1234 to configure the wizardsand the advanced features.(or if you already changed your password, enter that password)
7 On the right hand side of the screen you will see a drop down menu. click on NETWORK.
8 Then click on NAT.
9 Find the area to configure Port Forwarding.
10 The ports that Microsoft recommends to be open are:88 UDP, 3074 UDP, and 3074 TCP.

It also looks like you will have to set up a static address on your XBOX (I was looking at the .pdf for your particular router) You can do this by editing your network setting on your XBOX console, and then using this address as your "server" address when opening the above mentioned ports on your router.
ftp://ftp.zyxel.com/P-660HW-D1/user_guide/P-660HW-D1_3.40_Ed1.pdf

Either your web-browser has "cached" the web-page previously delivered by the TILGIN,
or your computer is still connected to the TILGIN.

In the former case, "reload" the web-page.
In the latter case, turn off the TILGIN router, and try again to connect to the ZYXEL router.
Also, check that your network-cables are correctly connected to one of the LAN ports on the ZYXEL router.

You are trying to open the NAT on the router for X-box.
For this you will need to reduce the MTU settings on the router to 1365.
You will also need to trigger some ports on the router.
For this you will need to open the router set up page.
Router set up page is the page where you can change the settings of the router
Click Here to know more about router and network

Here is a list of possiblities assuming you have not configured a password yourself and forgot it, if you have forgot your own password your will have to reset the router to default setting by pressing in the reset button on the back, usually its very small and will require a tack, or perhaps a tooth pick.

Possible Usernames/Passwords:

admin/no password

admin 1234
admin/1234

no user name/admin

no user name/1234

root/1234

webadmin/1234

In order to access your default web page remotely, port 80 "INBOUND" must be open to the internet.

To access your web server, two things need to happen.
The first is you or someone else must initiate a http request on port 80 using the public IP Address of your DSL connection.
Second, your router must forward that request to your servers internal ip address.

Ex. Lets say your public ip address is 24.39.45.10. In a browser window from a remote location, you enter the URL http ://24.39.45.10 The request will be sent to your router on port 80.

Your web server will not have the ip address 24.39.45.10 because it's on the private network side of your router. So, lets say the private ip address of you server is 192.168.1.100

You need to configure your router to take the http request coming from the internet on port 80 to ip address 24.39.45.10 and forward that request to 192.168.1.100. This is known as port forwarding.

You also need to configure the host header name of your "web page" so it knows it needs to display the web page.

Since we're just using ip addresses in this example and not an actual FQDN (fully qualified domain name), you would make a host header entry for the web page of 24.39.45.10.

To do this open IIS.
Navigate to the web site in question and right click on it then select properties.
On the website tab, ensure the port number is set to 80 and choose the appropriate internal ip address if you have more than one network adapter in the server.
Next click on the advanced tab and look for the heading Multiple identities for this site. This is where you enter the ip address 24.39.45.10.

If you have a fully qualified domain name, you would enter the domain name instead of the ip address as specified in this example.

Host header names are the key to running multiple websites from one physical server as long as it has the necessary horsepower to do so.

Hope this helps and isn't confising. If you're confused in any way, don't hesitate to ask for clarification.

in there you just give the dyanamic ip address automatically then you get it but you want to give it the go for the router mode in that you get it i just send a link you just download that think user giude then go througt it step by step ok

zyxel.com in that ftp server is there go througt it

Try port 192.168.40.1