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Beginner

Laptops can`t ping each other on the same SSID

Hi guys,

Iam having issue with Wireless Lan.

For some reason my Laptops in the same SSID can`t ping each other.

But they can ping default gateway->can go to the internet.

Somone know what is the problem?

Regards,

13 REPLIES 13
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Participant

There could be any number of several factors at play here, from the wireless access point configured to not allow inter-device communications, to Windows Firewall (Linux iptables, etc.) blocking ICMP.  The latter can be easily verified with a back-to-back connection between the laptops (using a cross-over cable).

Can you provide some additional details regarding the equipment and software in use?

Best,

Ed

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Do you have peer to peer blocking enabled? Is this autonomous or lightweight?

-Scott
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thanks for the fast replay guys.

Scott- No we dont have peer-to -peer blocking.

Edwin-how i can check the inter device communication?

because when i connect the same pc`s to the wired network, they can ping each other.

when they go to the wireless network.-> they cant..

Regards.

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Liad,

     I'd check to see if the windows firewall is enabled on the wireless interface.

HTH,

Steve

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Stephen,

How do i check it?

I can see that windows firewall is enabled, but allowing ICMP traffic.

I put allow any just to try, and still didnt work.

Regards,

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It sounds odd, but instead of allowing can you disable the windows firewall on the wireless interface?

HTH, Steve ------------------------------------------------------------------------------------------------ Please remember to rate useful posts, and mark questions as answered
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What device are you using as your wireless access point?

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Variance .

1131AG

1242

1042-mostly

1142

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So when you have two users on the same AP, the devices can't ping each other.  Or is it an issue when they are on different AP's?

-Scott
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Same and differnet.

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Can`t the system team put those elements on the GPO.

Are you sure it`s the firewall?

Maybe it somthing wrong with the access points? maybe i need to allow some inter-connectivity between them?

Regards,

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Nope, not 100% sure it's the firewall.  But I have seen it cause issues.  Generally as far as the WLC is concerned, if you have peer-to-peer blocking disabled it's not going to mess with the traffic.

Oh, one last thing, take a look at the WLC interface and see if an ACL has been applied there.

HTH,

Steve

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Please remember to rate helpful posts or to mark the question as answered so that it can be found later.

HTH, Steve ------------------------------------------------------------------------------------------------ Please remember to rate useful posts, and mark questions as answered
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Be sure Public Secure Packet Forwarding is DISABLED for the Radio Interface in play