LinkSys WRT54GS DHCP Problem (Mac OS and Linux)

3 May 2009

On Friday, I decided had a go at fixing the occasional dropped connections I’ve been seeing between Windows machines and my LinkSys WRT54GS (v5,1) router. As part of the process, I upgraded the firmware to what I assumed was the latest version. That was a mistake. After the upgrade, the router’s DHCP server would no longer dole out an IP address to Mac OS X or Linux clients, either wired or wirelessly (Windows XP clients seem unaffected).

It turns out that the solution is to get the latest latest firmware. The Cisco/LinkSys page offers version 1.50.9 of the firmware as the most recent version for most models; this version exhibits the problem. Instead, try version 1.52.2 available here:

LinkSys WRT54GS Firmware version 1.52.2

The solution is simple, but took me a while to find. Hopefully, this entry will save time for anyone experiencing similar problems.

This site is maintained by me, Rob Hague. The opinions here are my own, and not those of my employer or anyone else. You can mail me at rob@rho.org.uk, and I'm robhague on Twitter. The site has a full-text RSS feed if you're so inclined.

Body text is set in Georgia or the nearest equivalent. Headings and other non-body text is set in Cooper Hewitt Light. The latter is © 2014 Cooper Hewitt Smithsonian Design Museum, and used under the SIL Open Font License.

All content © Rob Hague 2002-2015, except where otherwise noted.