Whitelist IP with Telnyx (cronjob)

whitelist_telnyx_ip.sh

#!/bin/bash

# This simple bash script will auto-update Telnyx with the network's public IP address when it changes.
# Simply add a cron job to call it every minute or so.
#
# requirements: apt install curl dnsutils jq
#

API_KEY="{{ API_KEY_HERE }}"

# Our current IP address and path to our IP cache file
IP_ADDRESS=`dig +short myip.opendns.com @resolver1.opendns.com`
CACHE_PATH="/tmp/ddns-cache.txt"

# Fetch last value of IP address sent to server or create cache file
if [ ! -f $CACHE_PATH ]; then touch $CACHE_PATH; fi
CURRENT=$(<$CACHE_PATH)

# If IP address hasn't changed, exit, otherwise save the new IP
if [ "$IP_ADDRESS" == "$CURRENT" ]; then
  echo "IP didn't change. Not updating. $IP_ADDRESS"
  exit 0
fi
echo $IP_ADDRESS > $CACHE_PATH

# Update Telnyx

echo "Updating Telnyx with new IP: $IP_ADDRESS..."
curl --silent --location --request POST "https://api.telnyx.com/v2/access_control_ips" -H "Authorization: Bearer $API_KEY" -H "Content-Type: application/json" --data '{"ip_address": "'$IP_ADDRESS'", "ip_address_type": "media"}' | jq
curl --silent --location --request POST "https://api.telnyx.com/v2/access_control_ips" -H "Authorization: Bearer $API_KEY" -H "Content-Type: application/json" --data '{"ip_address": "'$IP_ADDRESS'", "ip_address_type": "signaling"}' | jq
echo "Done."