Here's the source.
Http://wiki.openwrt.org/toh/netgear/telnet.console
I did it once and succeeded.
I am windows, so download the TelnetEnable.exe
I passed it here: http://download.csdn.net/detail/u010211892/8400845
And then
TelnetEnable.exe 192.168.1.1 000fb5a2be26 Gearguy Geardog
Where Gearguy is the official reserved user name Geardog is the default password
Then the Telnet seal is lifted, and anyone can connect directly without a password, so it's more like a seal.
Telnet 192.168.1.1Connecting to 192.168.1.1...BusyBox v0.60.0 (2009.09.01-00:50+0000) built-in shell (MSH) Enter ' help ' For a list of built-in commands.# exitconnection to host lost.
After rebooting, the Telnet seal resumes and needs to be repeated more than once to open the seal.
How to change the user name password
After Telnet login
# NVRAM Set super_username=newusername# nvram set super_passwd=newpasswd# nvram commit## reboot
Open Netgear WNDR3400 telnet-unlock the seal