I have a Linksys Wireless WRT160N Router and noticed I have had it for more than a year that the wireless will drop out when I am using my I touch. A few months back I upgraded the firmware and still have the problem. I have to reset the wifi on my I touch before I can reconnect. I though it might only be a problem with the I touch until last week when I got a smartphone and it is doing the same thing to with that. thanks tom

SOURCE: Linksys WRT54GX2 constantly disconnects

I just upgraded from firmware version 1.01.14 to 1.01.22 and I have the same problem, the router just keeps resetting itself. I think the solution is to go back to the old firmware, but I haven't been able to find a copy yet, Once I find firmware version 1.01.14 for the WRT54GX2 router. I will let you know if this is the solution... :)
WRT54GX2

SOURCE: How to Upgrade the Firmware on a Linksys Router

I have update the fireware of linksys router WRT54G ver.2.2 by wireless.. Wrong move.. Then it stop loading.. now I can not get in to the router even i reset the router.. what can i do to have it back..

SOURCE: cannot reset router after Firmware upgrade failed

you may have bricked it... there is a solution that i've successfully done i'll get you the website

SOURCE: How do I activate WPA on my Linksys wireless router?

Your users guide will better explain this; however, if you do have any other questions, please let us know.
Here is a link for your users guide online:
http://downloads.linksysbycisco.com/downloads/WRT160N_ug,0.pdf

You will find important information in Chapter 2 and information for setting up WPA in Chapter 3 Under Wireless > Wireless Security

Hope this helps.

SOURCE: Linksys wrt160n drops connection

Have you verified the DHCP lease of the external and internal IP? Could be a case where the issued IP is renewed and breaks comm, although this should not happen.