We have a D-Link DI-624M "Super G With MiMo Wireless Router" being used to provide wireless internet for roaming laptops in the office. The desktops are all using wired connections to a switch and working fine. The wireless connections to the D-Link router will connect and get internet access, however some sites work fine and some sites will not load. It is almost as if there is a firewall or filter/proxy set up blocking certain sites, however I have been through all the settings in detail and this is not the case.
As an example, google always works fine, but cnn.com never works. Similarly, I can ping google.com and get a normal response, but if I ping cnn.com I get a request timed out. This happens on any computer connected to the wifi. Again I've been through the router set up site and there is no firewall or filter for specific sites or IPs in place. I am stumped with this. Does anybody have any suggestions? Thanks!
Best Answer
Ping is not the right diagnostic tool here. Cnn.com can't be pinged from my network either, probably because they don't allow incoming ICMP...
Start with the basics:
Do the wireless clients get the same ip configuration as the wired clients: ip address range, subnet mask, DNS server(s), default gateway?
Can you resolve (using nslookup) cnn.com from a wireless client?