Wrt54gl

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Setting up the wrt54gl router

one problem I had was that the hostname was set to sth. strange and therefore the router didn't get a dhcp lease from the network. ssh into the router and do:

nvram set wan_hostname=mobicomp

nvram set boot_wait=on

nvram set wl0_wep=disable

nvram set wl0_phytypes=b

nvram get wl0_phytypes

nvram set wl0_net_mode=b

nvram commit

restart router - don't press reset, switch the power off. Reset bootes the router in fail safe mode.

ifdown wifi

wl0_wep enabled

wl0_key 1

wl0_key1

wl0_auth 0

nvram set wl0_antdiv=0

ifup wifi


first do:

ipkg update ipkg install wl

useful wl commands, a complete list can be found here Wl:

Get tx power limit:

root@mobicomp:~# wl txpwrlimit Current TX Power Limit: 79 mW ( 19.00 dBm)

wl band b - force use of 802.11b band

wl ssid - Set or get the current SSID.

wl wep Set WEP options. 

       wl wep [options]
       [on|enable|1]   enable WEP
       [off|disable|0] disable WEP
       [sw|software]   perform WEP in software
       [hw|hardware]   perform WEP in hardware

wepstatus 

       Set or Get WEP status
       wepstatus [on|off]

primary_key 

       Set or get index of primary key

addwep Set an encryption key. The key must be 5, 13 or 16 bytes long, or 

       10, 26, 32, or 64 hex digits long.  The encryption algorithm is
       automatically selected based on the key size. keytype is accepted
       only when key length is 16 bytes/32 hex digits and specifies
       whether AES-OCB or AES-CCM encryption is used. Default is ccm.
       addwep <keyindex> <keydata> [ocb | ccm] [notx] [xx:xx:xx:xx:xx:xx]

channel Set the channel: 

       valid channels for 802.11b/g (2.4GHz band) are 1 through 14

txpwr1 (number one, not L) Set tx power in various units. Choose one of (default: dbm): 

       -d dbm units
       -q quarter dbm units
       -m milliwatt units

Can be combined with: 

       -o turn on override to disable regulatory and other limitations

Use wl txpwr -1 to restore defaults

wl txpwr1 -o -m 5 (used by us)


WPA: 

http://wiki.openwrt.org/OpenWrtDocs/Configuration#head-3df0fd425a927a2d9a7e5c13f070bc4840eb7144

Backdoor into the router via ssh tunnel: 

       client : dropbearkey -t rsa -f identity
       client : dropbearkey -f identity -y >> identity.pub
       copy identity.pub over to server
       server : cat identity.pub  >>~/.ssh/authorized_keys

       ssh -i /etc/dropbear/dropbear_rsa_host_key -l "USER" "HOST" -R "22222:localhost:22"
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