Use the broadcom_K26 or broadcom_K3X nv64k build (or trailed build with WNDR4000 in the name). To upgrade from a K26 to K3X builds it is recommended to use a trailed build. Upgrade DD-WRT from the Administration->Firmware Upgrade page, and reset if any issues are encountered. [] Build InformatioOnly use builds with nv64k or WNDR4000 in the name for upgrading, or you risk bricking.
The routers below are only supported with DD-WRT, Tomato or Sabai firmware: ASUS: ASUS RT-N10; ASUS RT-N10U; ASUS RT-N10U_BLACK; ASUS RT-N13U B1; ASUS RT-N16; ASUS RT-N53U; ASUS RT-AC56U; ASUS RT-N66U; ASUS RT-AC66U; ASUS RT-AC68U; ASUS RT-N12 ; Note: many of ASUS WL500 routers have dd-wrt builds with OpenVPN support, but not supported due to How to Use DD-WRT Router as Wireless Adapter – Client Mode Sep 13, 2014 OpenWrt Forum Archive
[SOLVED] DDWRT vs anything else - Wireless Networking
Jun 12, 2014
#4710 (tl-wdr4900 v1.3 after reboot client mode - DD-WRT
Supported Routers – StrongVPN The routers below are only supported with DD-WRT, Tomato or Sabai firmware: ASUS: ASUS RT-N10; ASUS RT-N10U; ASUS RT-N10U_BLACK; ASUS RT-N13U B1; ASUS RT-N16; ASUS RT-N53U; ASUS RT-AC56U; ASUS RT-N66U; ASUS RT-AC66U; ASUS RT-AC68U; ASUS RT-N12 ; Note: many of ASUS WL500 routers have dd-wrt builds with OpenVPN support, but not supported due to How to Use DD-WRT Router as Wireless Adapter – Client Mode Sep 13, 2014 OpenWrt Forum Archive Feb 01, 2013