OpenWrt Forum Archive
https://forum.archive.openwrt.org/viewtopic.php?id=38742&p=811.04.2014 · If you can neither connect through telnet or ssh, you may need to do a factory reset. You can try to repeat the steps to get to the EMERGENCY FLASH page, or you can use OpenWrt's built-in failsafe mode. Activate failsafe mode by repeatedly pressing the WPS button on the DIR-505L as soon as you plug it into a power outlet.
OpenWrt Forum Archive
https://forum.archive.openwrt.org/viewtopic.php?id=543525.04.2006 · Telnet, SSH (ssh root@192.168.1.1) or WebIF will all use the same user=root, pass= (what-you-set). Just FYI, this is the Whiterussian forum and the filename openwrt-wrt54g-2.4-squashfs.bin indicates a Kamikaze (the current) release. I mention this only to help these confusing little things so easy to miss.
OpenWrt Forum Archive
https://forum.archive.openwrt.org/viewtopic.php?id=5388916.11.2014 · Turn device on and wait for the * icon to blink, then push the reset button and the * icon should start flashing rapidly. You're now in failsafe mode. 6. Connect via lan to lan port 1 on the device. 7. Open 2 terminal windows. 8. In window 1 write "telnet 192.168.1.1" some ASCII art should appear saying "OpenWrt".