usb wireless can't resolve addresses

[chinaguy]

My DSL modem was being used as bridge to my netgear router and all was fine. I reconfigured my Motorola 3347 modem/router to work as a router and eliminate one black box. It is set up PPPoE and seems to function correctly. I can browse with no problem but have no FTP, no email and synaptic can't connect due to failure to resolve. Running Wireshark I see standard DNS query and standard DNS response which returns the correct address for the inquiry; in this case pclosusers.com. But I get the can't reslove response in synaptic. The response seems to get lost in the mail.
I discovered that if I connect ethernet cable and use eth0 there is no problem. I really do not want to permanently run a cable across the room. I have the latest/greatest PCLOS installed. I am using Belkin usb wireless adaptor which I have used for well over a year with no problem. I have no firewalls at the current time.

Any thoughts?

Thanks,
Chinaguy

[ElCuervo]

Since the problem emerged when you switched to one box, have you investigated all the settings of that box? That is, via 192.168.0.1 (or whatever your box uses) in a browser?

Also, try pinging the box, then try pinging a web site on the other side of it, e.g. www.google.com, to see if you can get responses from both.

[dixonpete]

You could try setting the DNS lookups to Google's free DNS servers.

8.8.8.8
8.8.4.4

[chinaguy]

Perhaps my posting was unclear. DNS is working fine. I have no problem web browsing. But if I try to use thunderbird, filezilla, pan or synaptic it ACTS as if there is no resolution to the DNS query. In fact there is, as I can plainly see it in wireshark. but it seems to not get back to the app. If DNS were not working I could not use chromium or firefox which, in fact, I can.

Chinaguy