ddns

Helper scripts for updating a dynamic DNS domain name.
Uses ip addr and curl to get your IPs, sends them out with nsupdate.

usage

• Set up your dynamic DNS zone:

  • mkdir /var/lib/bind
  • touch /var/lib/bind/db.dynamic.example.com.jnl
  • copy and edit db.dynamic.example.com to /var/lib/bind
  • insert and edit the contents of named.conf.local into your /etc/bind/named.conf.local
  • run ddns-confgen and copy the generated key to /etc/bind
  • make sure the key is only readable by the bind user

• On your clients:

  • get the keyfile, chmod it to be only be readable by the user which the script will run as
  • Copy config.example to a file named config
  • Edit config to your desires
  • Execute:

    SEND=false ./update # to see what would be sent
    ./update # to actually send it

requirements

These are the minimum requirements for running the script on a client:

• nsupdate
  can be found in the dnsutils package on most distros
• bash
• GNU awk
  can be found in the gawk package
• curl
• ip utility
  can be found in the iproute2 package