Does IPTABLES able to manage domain instead IP addresses?

Question

In case that my client have the dynamic ip. He have a domain name to point to his ip addresses.

I'm just want to allow his dynamic ip to join my network.
Do you have any suggestion?

Answer 1

No. A quick search on iptables and fqdn (Fully Quailified Domain Name) yielded this:

$IPTAB -A OUTPUT -p tcp -o eth0 -s 0/0 -d www.microsoft.com -j DROP
##$IPTAB -A FORWARD -s 0/0 -d www.microsoft.com -m state --state NEW -j DROP


starting rules for NATing
iptables v1.2.11: host/network `www.microsoft.com' not found
Try `iptables -h' or 'iptables --help' for more information.