I have a Linksys Router WRT54G. I'm typing

First, access the GUI of your router. Open browser and type 192.168.1.1, type admin for username and password or if you had change it before, use that username and password that you had set up. Once you see the Linksys GUI page, click on Administration on the upper right corner of the screen and click on management, from there you can edit the UPNP settings.

You may need to reconfigure the router. Also when reconfiguring it the computer would need to have ehtenret cord connected from router to pc. You can go into the router by typing 192.168.1.1 in address bar of internet explorer or your web browser. Then for the user id leave it blank and enter admin for password. This should allow you to log in. With in tehre you can create a wireless network under Wireless settings. Also you could check the firmware while in there and go to the link bellow to see if any updates avalible.

http://homesupport.cisco.com/en-us/wireless/lbc/WRT54G
Router Help
www.jdtechsource.com

Reset the router by pressing the reset button for 5 seconds and reconfigure it. The firmware might need to be reset... Then access the router's GUI by typing the default gateway 192.168.1.1

Hi Friend,

Type 192.168.1.1 in the address bar of the Internet Explorer and hit enter. Do not type anything in username and type admin in password(only if you have not set the router password).

Now click Access Restrictions tab. Click Enable and restrict the acess according to your need.

Regards
Chiranjeet

You can access the router by opening up your internet browser and typing in 192.168.1.1. This is the default address for your linksys router.

Good Luck,

NOLA Tech

Default settings for the WRT54G can be performed by pressing the
reset button for at least 10 seconds and then release it.

The router can be accessed by opening internet explorer:
type in adres http://192.168.1.1 and enter.
The login for the router default settings is:
user: [leave blank]
password: admin

There are about 10 versions for this type router on the Linksys
support site, "Get Downloads" like manual and firmware :
http://www.linksysbycisco.com/UK/en/support/WRT54G

Note: from the support page select your version first

  If the Power LED on your Linksys router is blinking, this means the firmware is corrupted. Since the firmware is corrupted, you won’t be able to access the web-based set up page of the router. Instead, you will be using tftp.exe to update the firmware. We recommend that you perform the following procedure in a Windows-based computer.
Downloading the Firmware

Follow the procedure here:

http://linksys.custhelp.com/cgi-bin/linksys.cfg/php/enduser/std_adp.php?p_faqid=3703&p_created=1151556377&p_sid=7FfWNnGj&p_accessibility=0&p_redirect=&p_lva=19073&p_sp=cF9zcmNoPTEmcF9zb3J0X2J5PSZwX2dyaWRzb3J0PSZwX3Jvd19jbnQ9Mjc3OSwyNzc5JnBfcHJvZHM9MCZwX2NhdHM9MTcyMSwxNzIzJnBfcHY9JnBfY3Y9Mi4xNzIzJnBfcGFnZT0xJnBfc2VhcmNoX3RleHQ9cmVzZXR0aW5nIHRoZSByb3V0ZXI*&p_li=&p_topview=1

No you do not need internet to access router page. I believe it is 192.168.0.1 though,have you tried this yet?

yobor4god, your best guide to setting up a Linksys router is at the Linksys/Cisco support site. I have provided a link to that page for you.
Linksys support here

Hi Pzarek,

The first thing that comes to mind is that your Linksys modem is using the same IP address as the router and it's causing a conflict. The quickest way to find out if there is a conflict is to get into the administration setup on the router and manually change the IP address of the router itself (currently it's most likely 192.168.1.1 - change it to 192.168.1.250). Linksys has most of its devices that provide dynamic IPs set to 192.168.1.1 by default so I would suggest that.

To log into the router (assuming you have your computer plugged into the router):

Bring up Internet Explorer and type in 192.168.1.1 into the address bar.

When it asks for a username/password, type in 'admin' for the username and 'admin' for the password (without the quotes).

You can change the IP address from 192.168.1.1 to 192.168.1.250 on the first page that comes up.

If you're unable to access the setup, make sure the router is powered up and hold in the Reset button on the back for 30 full seconds. At that point the information provided will allow you to access it.

Ben