IP addresses resolved but cannot ping them

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Waveblaster760

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Apr 9, 2008
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Hi hope you guys can help with a problem im having at work...
Currently I have a situation whereby I have connected a netgear wireless AP to a wired lan switch. The AP doesnt use DHCP and Ive assigned it an IP address within the same subnet as the rest of the network devices.
Now I can ping all network devices on the subnet.
The dns server for the network is the firebrick/firewall that sits between the outside WAN router and the internal LAN, this works fine for all other networked devices BUT not for my newly added wireless laptop connecting through the wireless AP. I can ping the firebridge..and if i ping a website the name is resolved into an IP address...but i CANNOT ping the website or the resolved IP.
There are no firewalls running on the laptop..and all settings match that of all other devices on the network...Any Ideas chaps?!?
 

zx10guy

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Your firebrick firewall is probably blocking you. You need to find out if the firewall rules are allowing the entire subnet, a specific range of IPs, or specific IPs to go out.
 

Waveblaster760

Thread Starter
Joined
Apr 9, 2008
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The filters for the firebrick allow all traffic through within the subnet of which the acces point is a member of so should in theory work...If I take all the settings from the AP and configure them onto a laptop and connect straight to the switch with cat5 it works completely fine...is it possible that the firebrick sees the packets arriving via the wireless AP as a security threat or is any 'wireless encapsulation' stripped off once the packets reach the ap and go through the switch? ...ie does the firebrick see a wireless connection as a threat?
 
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Jan 28, 2008
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firewall or icmp blocking set on the AP?
If you connect the laptop wired do you have different results?
Is ping the only problem? Can the laptop get to google for example?
 
Joined
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I don't know what a firebrick is but if it anything like a sonicwall there are seperate rules for LAN and WLAN access. For example, if you allow port 25 out on the LAN you also have to create a rule for the WLAN as well.
 
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That would only be true if the sonicwall was doing wired and wireless which in this case the AP is off a switch. The firebrick wouldn't know if it was wired or wireless.
 
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