This would imply that the IP that was specified for the install is not a valid IP address on your machine. Example, you are running a LAN, or behind a NAT, with a different IP on the machine than would be visible from the internet.
You can test out the command by running:
wget --bind-address=1.2.3.4 http://www.directadmin.com/index.html
where 1.2.3.4 is the IP address in your license file. If you get the same error, then that IP is not present or valid in your network device.
You can run
/sbin/ifconfig
to see what IP's are present in your network device. Make sure the IP in your license is present somewhere in the output.
The IP in your license file *must* be present and working in the network device.