I have a full signal in my ATT modem but the wireless network keeps going up and down. Sometimes I'm able to restart the router (Linksys WRT 160N) and restore the network other times it take 3-5 restarts. Any ideas?

Make sure your router's WAN port is set to dynamic IP. If the light on the front doesn't glow/blink for the WAN port, try a different cable. If a different cable doesn't work it's probably toast. :( This problem appears to be directly linked to the relationship between the WAN port and the modem. Given that the devices can connect to the router, but not internet, it has to be the WAN. Sometimes if the modem goes out it will send too much voltage through to the router and fry the WAN. Had that happen to my parents router. If the above doesn't "fix ya" then try a different router.

Worst case, you might have to put a wireless card in your PC and bridge the modem (wired connection) to the wireless card and broadcast for your wireless devices. At least until you get a new router.

If you have a wireless router and it is connected to the DSLor cable modem then - To connect to your wireless router, the router needsits wireless settings to be configured with the SSID, encryption key etc., alsothe wireless cards in all the laptops/computers needs to be configured withthese router's wireless settings. Then the laptops/desktop computers cancommunicate with your wireless router and access the Internet via the DSL or cable modem.

Use this 2 possible solutions: http://discussions.apple.com/thread.jspa?threadID=1787684
On this one go to FAQ and there go the the MAC tab, have very useful info: http://homesupport.cisco.com/en-us/wireless/lbc/WRT160N

* NOTE: If you tried to set-up the WRT-160N Router previously, but failed, with the Router ON, press the "Reset" button on the back panel and hold it down for 10 seconds, then release. This will reset the Router to factory settings and erase all previous data.
Then do this
1. Hook up the Linksys WRT-160N Router to the modem(cable, DSL or satelitte)
2. Hook up the Linksys WRT-160N Router to your computer via a LAN cable with the LAN cable in Port #1 on the Linksys WRT-160N Router.
3. Type http://192.168.1.1 in the address bar of your web browser.
4. Log-on to the Linksys WRT-160N Router with these log-on credentials:
Username: linksys (lower-case)
Password: admin (lower-case)
5. Click on the "Clone PC MAC Address" tab.
6. Click the "Clone PC MAC Address" button.
7. Click "Save", click "Continue".
8. Click the "Wireless Security" tab.
9. Choose "WPA2 Personal - TKIP/AES" for encrypted security.
10. Enter encryption password (passphrase).
11. Click "Save", click "Continue".
12. Exit the web browser.
13. Disconnect the LAN cable from the computer and Port #1 on the Linksys WRT-160N Router.
In about 5 seconds, your wireless connection should be up and running.

go to the wireless settings in the setup (192.168.1.1) and set the signal strength to its max.

As far as I can tell, no non-Microsoft wireless adapters will work with the XBOX 360.

Hi there, sounds like you need to sync your modem and router. First turn off the power to the modem, then to the router. After a few minutes reinstall the power to the Modem then to the Router. Restart your computer and see if you now can connect. Good Luck...

U can try reset the router back to default factory mode, then reconfigure again...

First off thanks for using fixya.com

Second, I too am a dd-wrt user and found a similar problem when using dd-wrt with my IPCOP. You may want to go into the "Security" section of your dd-wrt and disable any fire walling or access-restrictions. Since you are already running zonealarm. Or remove zonealarm if you plan to use dd-wrt as your firewall.

Running multiple firewalls will slow down your network/Internet traffic.

Hope this helps you out.
Jei