Airport extreme firmware update screwed up my IP sharing and internet

Question

I am having all the same problems -
1) I upgraded to the 7.1 firmware
2) I got the 'double NAT' error, but no problems connecting to the internet
3) When I turned the bridge mode to off, I lost my internet, so I
4) Tried to turn the bridge mode back to Share an IP address, but got an error about IP addresses.
5) I went into Setup - the network port mapping tab - and unchecked and then re-checked the Airport button, so now I have internet access, but only at one computer, and if my computer is functional, my VOIP modem is not (or vice versa)!
6) when I tried going back into "Share an IP address", I got the same error about the beginning and end DHCP conflicting with my WAN.
(If it helps to know, I have two AEBS - one is set up as the Main WDS station, and the other Participates in that WDS)
Now I'm afraid to touch anything!!

Answer 1

kayek wrote:
I have installed the new AirPort Extreme firmware update (7.4.1) and with airport disk utility i want to connect automatically my hard drive related to the airport (wifi mode) , the connexion was working well before that update and now i have an error message (unknown user or wrong password error -36 ...) when the disk tries to connect automatically.
I would like to rollback to the 7.3.2 firmware version but there is no way to find it on internet (or on apple download) even if i change rollback airport utility to version 5.4.1: the binary firmware 7.3.2 disapeared from my mac and i can only choose 7.4.1 binary file ...
Do anyone have the same problem ?I you found how to fix it please answer my post (thanks)
Ok, here's how you actually do the downgrade - here's what Apple says, not exactly right - I would add that you HAVE to go to the MENU, choose BASE STATION, then hold down the Option key while pressing UPLOAD FIRMWARE, this will get you to a window that has the dropdown with older versions....the other versions were not available to me any other way.
{quote}If I have a computer or device that does not work well with an AWD with the latest update, how can I install previous (earlier) versions of firmware?
1. Open AirPort Utility.
2. From the AirPort Utility menu, hold the Option key (Control key in Windows XP and Vista) and choose Check for Updates....
3. Select the specific firmware version you require.
4. Click Download.
5. Select your base station and choose Manual Setup from the Base Station menu, or double-click on the AWD icon.
6. Choose Base Station > Upload Firmware.
7. Select a firmware version and click OK.{/quote}