Things, I would try first:

• example.com? - is the returned IP the correct one? Set manually to see if that helps?
• Check if router filters on MAC... (update:) If the router does not forward IP packets from an unregistered source (the MAC of your PCs card/dongle), the request will not reach the server - this is a simple (but not very effective) security measure.
• Check if local hosts interface(s) is reachable from server (routing). (update:) If the server is multi-homed and the routing is not configured right, the response might travel through the wrong (default-)network.
• Snoop at server side, analyse traffic with wireshark. (updated)
• Use i.e. perltidy to make code easier to parse for humans ;-)

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In reply to Re: why i don't receive DHCPDiscover message from server using dongle and why same code give DHCPNac on wifi by Perlbotics
in thread why i don't receive DHCPDiscover message from server using dongle and why same code give DHCPNac on wifi by ppp

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