Read here some articles of howto do this and that in installing, setting up, administering and programming stuff in embedded and Linux computing. It is intended only to facilitate tasks which are more frequent.

Dynamic DNS on OpenWrt

Because of the ongoing transition from ipv4 to ipv6 in the internet, ipv4 will be limited in routing capabilities on the ISP-side.

With today DS-Lite stacks given by the ISP, the NAT-routing mechanism has been shifted to the ISP-side and not more than a local ipv4 network without public IP's is offered.

OpenWRT