Can't get to 192.168.2.1 anymore. why?

go to google.com and type bell: type the model of your router you can read the details of it.

http://www.manualowl.com/m/Dynex/DX-wegrtr/Manual/197670 Page eight will tell you how to reset the router to default settings, that includes password and everything else.

Here is your solution.

Log into the routers interface usually 192.168.1.1 or check the default gateway address with the ipconfig command in the command prompt. Then navigate to the wireless security tab and the key should be listed.

You should be able to do it from whatever computer you first set it up with under its settings.

You can confiure your without disk too .
Connect your router to computer with ethernet cable then you can access it with following default link.
http://192.168.0.1
or
http://192.168.1.1
If you are not able to access it with above ip then check your computers ip address gateway ip is your router ip try with it.
Then it ask for user name and password.
Type user as "admin" and password as "admin" or "password" or blank.
Then you can see configuration page of router.
Click on WAN settings and set those settings as your internet service provider settings.
Enable DHCP if you want to get ip from router.
Click on wireless settings enable wireless then enable WEP Security then add WEP code .It is your password to connect wi fi.Then save settings and restart router.
Then you can connect your wi fi network with that code.

Let me know if you need further assistance.
Thanks for using FixYa.

I'm not familiar with that particular router, but all of them are about the same. You can go in and edit firewall settings to allow a particular IP address to have access. Don't disable the firewall completely, just set it to allow that I.P address to have full access.

Here you go:
http://www.dynexproducts.com/skins/skin_1/Topics/Documents/07-366%20DX-WEGRTR%20combined%20-%20WEB.pdf

Unfortunately, the DX-E402 is not a wireless router, so it can not transmit its signal without a physical cable connecting the router to your computer. If you want a wireless router that can also connect to your ISP, check out the Dynex Enhanced Wireless G Router:

http://www.dynexsupport.com/product/?pid=DX-WEGRTR

You can download the software from here:
http://www.dynexsupport.com/product/?pid=DX-WEGRTR