Ros3 Dyn DNS
Contents
Info
The following script should be created when you wish to update your ChangeIP.com Dynamic DNS account. Once created you should schedule this to run once in a while. The :global variables should be edited to include your unique username and password, interface name, etc. The script here should allow auto-detection of the default gateways interface name. This script below can be used if you have more than 1 WAN connection, but only 1 is active at a time.
This script will work as is, just navigate to System/Scripts and run it. This particular script works good with a 5 minute interval to update your Dynamic DNS with a scheduler.
Setup
For this script to function correctly, there are a few things that will need to be setup. Not necessary, but always good to have in place.
- Routerboard Identity Setup rb_Identity
- Routerboard Time Setup, either manually rb_time_manual or via NTP rb_ntp_setup
Enhancements
- Check out Dynamic DNS Schedule to create a schedule, that will run the script at a predefined period.
Script
# Define User Variables
- global ddnsuser "username"
- global ddnspass "password"
- global ddnshost "Host Name"
# Define Global Variables
- global ddnsip
- global ddnslastip
- if ([ :typeof $ddnslastip ] = nil ) do={ :global ddnslastip "0" }
- global ddnsinterface
- global ddnssystem ("mt-" . [/system package get system version] )
# Define Local Variables
- local int
# Loop thru interfaces and look for ones containing # default gateways without routing-marks
- foreach int in=[/ip route find dst-address=0.0.0.0/0 active=yes ] do={
:if ([:typeof [/ip route get $int routing-mark ]] != str ) do={ :global ddnsinterface [/ip route get $int interface] }
}
# Grab the current IP address on that interface.
- global ddnsip [ /ip address get [/ip address find interface=$ddnsinterface ] address ]
# Did we get an IP address to compare?
- if ([ :typeof $ddnsip ] = nil ) do={
:log info ("DDNS: No ip address present on " . $ddnsinterface . ", please check.")
} else={
:if ($ddnsip != $ddnslastip) do={
:log info "DDNS: Sending UPDATE!" :log info [ :put [/tool dns-update name=$ddnshost address=[:pick $ddnsip 0 [:find $ddnsip "/"] ] key-name=$ddnsuser key=$ddnspass ] ] :global ddnslastip $ddnsip
} else={ :log info "DDNS: No update required." }
}
# End of script
- log info "DDNS: End"