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Help!
After setting the Wifi Radio aside for a couple weeks waiting for part to come in I fired it up. It looked good but was not connecting to my network. 'Air' light was on but it would not connect to any radio stations. Long story short, I changed a setting, restarted the 520 (/etc/init.d/network restart), the telnet session stopped and that was it, sort of.

I could not log back into the 520. The IP address assigned (192.168.1.198) timed out. Other connections are refused by my wireless router.

This is where I am now. I have an ethernet cable connected to the LAN port on the 520. When I turn on the 520 it connects to the network, gets a IP address from my wireless router and acts as my wireless adapter - a little slow but I can connect to the network through the 520. I actually have two wireless networks running at the same time - I disconnect my regular connection and the 520 works just fine.

The IP address of the 520 shows up when I run ipconfig but I cannot telnet or ftp or http into that port to regain access. If I boot the 520 without the ethernet connection the 520 does nothing - until I plug my ethernet cable in, then it is my internet connection.

If you are still with me, the thing I think I changed when this all happened was changing the network from LAN to WLAN. Everything else was good.

Any suggestions about breaking into my 520?

Thanks...

Connect ethernet to LAN port and telnet (or ssh if you have a password set) to 192.168.1.1.

Also, if you don't have a display connected and the serial console disabled, you can log in via a serial cable.

If all else fails you could just reflash the firmware. Openwrt doesn't have a reset-button like dd-wrt does, since it doesn't use the nvram (as far as I know).

Edit
Seems that openWRT has a failsafe mode, which doesn't mount the JFFS2, so leaves a fresh openwrt. More info at http://wiki.openwrt.org/toh/asus/wl520gu#failsafe.mode

Thanks for the help - it's alive again (sort of)

I tried to ssh into the radio 192.168.1.1 like you suggested Jeff - did not work. I also could not ssh into the ip address that I had assigned originally 192.168.1.198. That's where I was.

Your suggestion gave me hope and what I finally did was open a cmd window (win 7) and issued the commands
ipconfig/release then
ipconfig/renew

My assigned ip address 192.168.1.198 showed back up as the default gateway and I was able to ssh into the radio. Before I had released and renewed the ip address this unit did not show up.

I still can't log into the radio over the wireless even though my air light is on...more time to work on it tomorrow.

Thanks again.

Make sure you connect to a LAN port, and not the WAN port...

Also make sure your network config matches the one I posted as a sticky on this forum... or is similar.

Configure your PC to use a fixed IP address (not DHCP) and set the gateway to 192.168.1.1. It should work.