Dynamic DNS

http://en.wikipedia.org/wiki/Dynamic_DNS

http://en.wikipedia.org/wiki/Nsupdate

Mac: http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man1/nsupdate.1.html

Usage:

You can update the zone of your domain using the private/public keys provided. Save the keys in a local directory, and type:

nsupdate -k Kdomain.+157+24316.private -v
server ns0.yepa.com
zone domain.com
update delete sales-pc.domain.com A
update add my-pc.domain.com 86400 A 192.168.1.2
show
send