Can I create a service like dyndns using Linux box?

ddclient is a Perl update client that will update dynamic DNS entries. It is small and full-featured (including HTTPS support) requiring no additional modules. It has been reported to run on most *nix distros. Supported features include: operating as a daemon, manual and automatic updates, static and dynamic updates, optimized updates for multiple addresses, MX, wildcards, abuse avoidance, retrying failed updates, and sending update status to syslog and through email.

 

Here is a minimal ddclient.conf file designed to update a single Dynamic DNS host plus a single Dyn Standard DNS host and using our CheckIP service to get the IP address:

# Basic configuration file for ddclient # # /etc/ddclient.conf daemon=600 cache=/tmp/ddclient.cache pid=/var/run/ddclient.pid use=web, web=checkip.dyndns.com/, web-skip='IP Address' login=your-username password=your-password protocol=dyndns2 server=members.dyndns.org wildcard=YES example.dyndns.org custom=yes, example.com

Yes indeed , you can use such a serviced like www.noip.com . upon registration you have three free hosts/redircet . if you have static ip then no problem , with dynamic ip there is tool you can download from there as well . that tool main idea is to flitch your ip automatically when it changes then send it back to noip.com account associated with your account . but in this case you will have to configure DMZ in your router to reforward the trafic  to the local host ip address (192.168.x.x)