My neighbor had the exact same problem - couldn't access his yahoo inbox using a wireless connection (netgear router). Setting the netgear router's mtu to 1492 in conjunction with using Dr. TCP (setting the MTU for the wireless card) worked.

I only saw one other post (another site) that said you have to set the MTU at both the router and the card. The other site, however, didn't tell you how to set it at the card.

Thanks for your help!

Firstly, thank you for this thread I am now able to access Hotmail & Yahoo. That is, after changing my PCs MTU # to 1358.

The bigger problem is for the rest of our users and clients. The story is, we just recently installed our building with wireless LAN to provide Internet to our clients and users. For the accesss point (AP) we're using the brand MERU AP100 and the other devices are: PoE switch is MNO M24PWR and Hitachi GS3000 and the AP Controller is Meru 1100 (japan brands I guess).

Now my questions are:

1. What is the default MTU# for Windows XPs, Win2K or Win 98?

2. Which of the devices given above can be setup in such a way that on the users' side, we no longer have to change the MTU#? Instead, change this device's MTU# (is there such?) to match the default MTU# of most PCs.

3. If its either the Controller or the switch, may I have the step-by-step procedure please.

Our vendor/engineers who installed this WLAN doesnt seem to know how to tweak this(I was even the one who told them about this MTU changing). Apparently this is their first venture for a wireless LAN so would really appreciate the BIG help from all of you!
Thanks.

I thank you so much for posting the link --> http://www.dslreports.com/front/DRTCP021.exe. It worked perfect for me. I have had yahoo email problem for days and tried to change numerous things including firewal, PPPoE, Virus, cookies, and you name it. It all happend after changing Adelphia cable connection to SBC DSL. The Yahoo email just wasn't working.

Thanks a million.

This works for me too --> http://www.dslreports.com/front/DRTCP021.exe.

Thanks a million. It resolved my yahoo email problem which was started after changing Adelphia cabel connection to SBC DSL.

Thanks for this information!!

I just switched from Earthlink DSL, where everything was working to Bellsouth DSL extreme. I got my Bellsouth DSL, and only one computer would access the Yahoo mail inbox. I couldn't figure out why.. As it turns out thanks to the tool from dslreports. My desktop's MTU on the wireless card was set to 1300, where as the other two computers were set to default along with the router.

I set up the router to 1358, and the other two computers. Now everything is working

Thank you very much for your answer. It did help me with the same problem (accessing all of microsoft.com and msn.com pages). I have a 1024 dsl connection in GREECE with a wireless modem-router (linksys) and an XP SP2 laptop with a 3COM wireless PCMCIA card.
As all people say... before asking just google around and you will find the answer, as I did here.
Once again thank you very much!

Help