I am running a Linksys WRT54GS router (firmware v4.72.1) with the SPI
firewall turned on. I have four computers all running Windows XP that could
access the Internet until just recently. Now 2 have access and 2 don't. The
only change that I can think of is a firmware update to the router about a
month ago. I have checked the obvious such as encryption codes, MAC numbers
and IP addresses. I found out when I turn off the SPI firewall all the
machines can access the Internet. When I turn the firewall back on only to
have access. Any suggestions or comments will be helpful.