vm/network/ddclient-configuration.sh

#!/bin/bash

# T&M Hansson IT AB © - 2020, https://www.hanssonit.se/
# Copyright © 2020 Simon Lindner (https://github.com/szaimen)

true
SCRIPT_NAME="DynDNS with ddclient"
SCRIPT_EXPLAINER="This script lets you setup DynDNS by using the Linux ddclient software."
# shellcheck source=lib.sh
source /var/scripts/fetch_lib.sh || source <(curl -sL https://raw.githubusercontent.com/nextcloud/vm/master/lib.sh)

# Check for errors + debug code and abort if something isn't right
# 1 = ON
# 0 = OFF
DEBUG=0
debug_mode

# Check if root
root_check

# Check if ddclient is already installed
if ! is_this_installed ddclient
then
    # Ask for installing
    install_popup "$SCRIPT_NAME"
else
    # Ask for removal or reinstallation
    reinstall_remove_menu "$SCRIPT_NAME"
    # Removal
    apt purge ddclient -y
    if is_this_installed libjson-any-perl
    then
        apt purge libjson-any-perl -y
    fi
    apt autoremove -y
    rm -f /etc/ddclient.conf
    # Show successful uninstall if applicable
    removal_popup "$SCRIPT_NAME"
fi

# install needed tool
DEBIAN_FRONTEND=noninteractive apt install ddclient -y

# Test if file exists
if [ ! -f /etc/ddclient.conf ]
then
    msg_box "The default ddclient.conf doesn't seem to exist.\nPlease report this to\n$ISSUES."
    exit 1
fi

choice=$(whiptail --title "$TITLE" --menu \
"Please choose your DynDNS-Provider.\nYou have to setup an account before you can start.\n
If your DDNS provider isn't already supported, please open a new issue here:\n$ISSUES
$MENU_GUIDE\n\n$RUN_LATER_GUIDE" "$WT_HEIGHT" "$WT_WIDTH" 4 \
"Cloudflare" "(cloudflare.com)" \
"deSEC" "(desec.io)" \
"Duck DNS" "(duckdns.org)" \
"Strato" "(strato.de)" 3>&1 1>&2 2>&3)

case "$choice" in
    "Cloudflare")
        PROVIDER="Cloudflare"
        INSTRUCTIONS="register an email address for your domain and get an Cloudflare API-key"
        GUIDE="https://www.techandme.se/setup-multiple-accounts-with-ddclient-and-cloudflare/"
        PROTOCOL="cloudflare"
        SERVER="www.cloudflare.com"
        USE_SSL="yes"
    ;;
    "deSEC")
        PROVIDER="deSEC"
        INSTRUCTIONS="get a DDNS account with password"
        GUIDE="https://desec.io/#"
        PROTOCOL="dyndns2"
        SERVER="update.dedyn.io"
        USE_SSL="yes"
    ;;
    "Duck DNS")
        PROVIDER="Duck DNS"
        INSTRUCTIONS="get a DDNS account with password"
        GUIDE="https://www.duckdns.org/faqs.jsp"
        PROTOCOL="duckdns"
        SERVER="www.duckdns.org"
        USE_SSL="yes"
    ;;
    "Strato")
        PROVIDER="Strato"
        INSTRUCTIONS="activate DynDNS for your Domain"
        GUIDE="https://www.strato.de/faq/domains/so-einfach-richten-sie-dyndns-fuer-ihre-domains-ein/"
        PROTOCOL="dyndns2"
        SERVER="dyndns.strato.com"
        USE_SSL="yes"
    ;;
    "")
        msg_box "You haven't selected any option. Exiting!"
        exit 1
    ;;
    *)
    ;;
esac

# Instructions
msg_box "Before you can continue, you have to access $PROVIDER and $INSTRUCTIONS.\n\nHere is a guide:\n$GUIDE"

# Ask if everything is prepared
if ! yesno_box_yes "Are you ready to continue?"
then
    exit
fi

# Enter your Hostname
HOSTNAME=$(input_box_flow "Please enter the Host that you want to configure DDNS for.\nE.g. 'example.com'")

# Enter your login
LOGIN=$(input_box_flow "Please enter the login for your DDNS provider.\nIt will be most likely the domain \
or registered email address depending on your DDNS Provider.\nE.g. 'example.com' or 'mail@example.com'
If you are not sure, please refer to the documentation of your DDNS provider.")

# Enter your password
PASSWORD=$(input_box_flow "Please enter the password or api-key that you've got for DynDNS from your DDNS provider.
If you are not sure, please refer to the documentation of your DDNS provider.")

# Present what we gathered
msg_box "You will see now a list of all entered information. Please check that everything seems correct.\n
Provider=$PROVIDER
Host=$HOSTNAME
Login=$LOGIN
Password=$PASSWORD"

# If everything okay, write to file
if ! yesno_box_yes "Do you want to proceed?"
then
    exit
fi

# needed for cloudflare to work
if [ "$PROVIDER" = "Cloudflare" ]
then
    install_if_not libjson-any-perl
fi

# Write information to ddclient.conf
cat << DDCLIENT_CONF > "/etc/ddclient.conf"
# Configuration file for ddclient generated by debconf
#
# /etc/ddclient.conf

# Default system settings
use=if, if=$IFACE
use=web, web=https://ipv4bot.whatismyipaddress.com

# DDNS-service specific setting
# Provider=$PROVIDER
protocol=$PROTOCOL
server=$SERVER
ssl=$USE_SSL

# user specific setting
login=$LOGIN
password=$PASSWORD

# Hostname follows:
zone=$HOSTNAME
$HOSTNAME
DDCLIENT_CONF

# Test connection
msg_box "Everything is setup by now and we will check the connection."
OUTPUT="$(ddclient -verbose)"
msg_box "Please check the logs below and make sure that everything looks good. If not, just run this script again.
If you are certain that you entered all things correctly and it didn't work, please report this to\n$ISSUES\n\n$OUTPUT"
exit