Internet Connection stopped working

[bhupinder.saini]

Hi

I have ibook g4 && airport express with firmware updatedv6.3.
My problem started 2 days back when my internet stopped working.
I have dsl cable modem connected to airport express.
I did everything from resetting the airport express, restarting laptop, modem all the first steps. My airport express say its connected, on the base its green signal working. but when i try to browse it says ur internet is not working. So firstly I am not able to browse internet using my base station, but i can connect to any other wi-fi it works fine.

Now my problem doesn't end here, i tried to directly hook the external dsl cable line to laptop ethernet port, i configure all the steps as per mac book, it again states connected, but when i try to browse get error ur not connected. SO i am just not able to use my dsl cable modem directly or using airport express base station.

My dsl cable is not down i got windows laptop it works fine when hooked with ethernet port, but that laptop also fails to work when tried with airport express base station, it states connected, but unable to browse.

Steps i performed after failed internet:-
1) did soft reset of airport express
2) upgraded airport express firmware to v6.3 from v6.2
3) downloaded airport utility tool to try
4) upgraded to latest security patch for mac tiger 10.4.11
5) tried directly connecting to dsl cable modem line using latpop ethernet port

Please provide some technical tips to get logs / terminal commands to diagonse / tools or utilities/ any guide .

thanks
bhupinder
00447501302832

 

[rjbaht]

I have an Airport Extreme. For more than a year, I've used it as my primary base station, and the connection to my ISP. The ISP is not a cable provider. It is a wireless setup that uses an antenna on my roof to connect to a base station on a water tower some miles away. The service uses PPPoE to authenticate and establish a connection. As of 12 Mar, everything was working fine, as it had been. 13 Mar, the Airport Extreme reported in the status bar that it was looking for a server and negotiating a PPPoE connection. I lost internet service that day through the Airport Extreme. After a week of troubleshooting which involved a service call to my house, I was able to verify the equipment here up to the router was working fine. I also tried to use an Airport Express to make the connection, with the same negative result. I finally took my MPB and both the Airport Extreme and the Airport Express to the home office of my ISP, and experienced the same result at their home office.
The tech I worked with there told me my router was toast. He configured a linksys wireless router, which I am now using to connect from home. It worked fine with the PPPoE.
I do not believe my Airport Extreme is toast because I tried two Apple devices, both known good prior to this, and both failed. Additionally, all the other functionality in the Airport Extreme works. I have to suspect something in the network infrastructure changed to not permit Apple devices to connect. But, in order to prove this, I need to know what to look for. Is there any special IP or port access requirement Apple devices need to work with PPPoE? Is there anything different between how a Linksys router connects with PPPoE as compared to an Apple device in PPPoE?
Is there something unique in MAC addresses common to all Apple devices that might be filtered by infrastructure?

--bart