The DD-WRT build I currently recommend for this router is K2.6 30880 (by Brain Slayer).
IMPORTANT: My testing shows that DD-WRT K2.6 builds are faster on the E4200 vs. But if you’re still convinced you want to run a K3.x build, read this article before migrating.
Read my article about why the 30-30-30 reset is required. My current trailed build recommendation for the E4200 is the K2.6 30880 “mega” build.
Yes, that’s different than what the DD-WRT wiki says, but it’s the place where the wiki and I don’t agree.
It uses simultaneous dual-band 2.5 and 5 GHz antennas, which allows wireless clients to connect at speeds up to 300 and 450 Mbps on each antenna, respectively.
For physical connections, it boasts four Gigabit Ethernet ports for high-speed wired LAN connections and a USB 2.0 port for attaching devices such an external hard drive or printer, which makes the device accessible on the network.
Hint: If you call them @ 877-959-7467 instead of ordering it online, tell them you read my blog and ask for the extra 15% discount!
If you simply unbox your E4200 and run it with the stock firmware, it’s a great router.Yes, you will lose all your settings and will have to manually reconfigure everything.No, you can’t save a backup file and restore it to the newer build.If you have a router other than the E4200, v1 don’t follow these instructions. Keep in mind that it’s possible to render your router inoperable if you install firmware that’s not designed for your router or skip any steps when installing. It’s strongly advised that any firmware updates be made with a computer that’s connected to the router via a physical Ethernet cable. Trailed builds contain model-specific headers that allow flashing from the router’s stock firmware, and will have the model number of the router in the filename.Once the firmware is loaded, I also like to mess with configuration settings via a physically connected computer, just in case I hose something in the wireless settings and can’t reconnect. The DD-WRT E4200 Wiki entry recommends using an older mini build for your first E4200 v1 flash, but you can use any trailed build that says “e4200” in the filename and you’ll be fine.Unfortunately, the newer E4200 v2, which was released after the original, is powered by a Marvell CPU and chipset, which is unsupported by third party firmware, meaning the E4200 v1 is the last — and widely recognized as the best — wireless router that Linksys has produced with third-party firmware support.