Cisco Wireless can ping but cannot browse Internet
Dear Expert,
My organization have purchased Cisco 4400 Series Wireless LAN Controller and 9 unit of Cisco Aironet 1240 AG Series on year 2008. There is no major problem since we're start using this product until last week. We're now facing problem whereby any computer that connected to this wireless device cannot browse to the internet.
We can ping to any web server and also telnet/ssh to the server, but cannot open any website through Internet Browser. We also can ping using URL eg. www.google.com which means the DNS is working fine but still cannot browse it. We don't think it is Firewall problem because
we also cannot browse to our Internal Website which don't have a firewall between them.
Please help us to solve this problem.
My organization have purchased Cisco 4400 Series Wireless LAN Controller and 9 unit of Cisco Aironet 1240 AG Series on year 2008. There is no major problem since we're start using this product until last week. We're now facing problem whereby any computer that connected to this wireless device cannot browse to the internet.
We can ping to any web server and also telnet/ssh to the server, but cannot open any website through Internet Browser. We also can ping using URL eg. www.google.com which means the DNS is working fine but still cannot browse it. We don't think it is Firewall problem because
we also cannot browse to our Internal Website which don't have a firewall between them.
Please help us to solve this problem.
SOLUTION
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ASKER
maximus5328: I don't have proxy server. If using wired connection the computer can browse to Internet.
jackieman: I've tried reboot the Cisco Wireless controller many times but still the same.
jackieman: I've tried reboot the Cisco Wireless controller many times but still the same.
How many computers refuse to browse AND can ping to the same URL?
ASKER
fmarshall: All PC, even if only 1 PC which connected to the wireless refuse to browse the Internet but can ping to the URL.
It can be hardware problem of Cisco Wireless controller.
Can you login the console of Cisco Wireless controller via wired computer?
Can you login the console of Cisco Wireless controller via wired computer?
SOLUTION
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jackieman: Yes I can login to the console via wired computer using web admin or telnet.
fmarshall: I'm not sure the firmware is up to date, mine is version 3.2.195.10. But before it's working like charm.
fmarshall: I'm not sure the firmware is up to date, mine is version 3.2.195.10. But before it's working like charm.
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It is due build in IPS installed in the switches. After disable the IPS the wireless network can work as usual.
Does your organization use any proxy servers?