Dyndns Updater

Duck DNS

• Create an account at https://www.duckdns.org/
• Create the script /var/local/duckdns/updater.sh (chmod 700)
• create the log file: touch /var/local/duckdns/duck.log

LOG_FILE=/var/local/duckdns/duck.log
DATE=$(date +"%F %T")
RESULT=$( echo url="https://www.duckdns.org/update?domains=flirt,zr0ke,r0942,m0rpheus&token=********-****-****-****-************&ip=" | curl -s -k -K -  )
echo ${DATE} ${RESULT} >> ${LOG_FILE}

improved script

#!/bin/bash

# Your DuckDNS token
TOKEN="your-duckdns-token"

# List of your DuckDNS subdomains
DOMAINS=("flirt" "zr0ke" "r0942")

# Optional: IP address to set (leave empty to use external IP)
IP=""

# Log file
LOGFILE="$HOME/duckdns_update.log"

# Logging function
log() {
    local message="$1"
    local timestamp
    timestamp=$(date '+%Y-%m-%d %H:%M:%S')
    echo "$timestamp - $message" >> "$LOGFILE"
}

# Loop through domains
for DOMAIN in "${DOMAINS[@]}"; do
    URL="https://www.duckdns.org/update?domains=${DOMAIN}&token=${TOKEN}&ip=${IP}"
    RESPONSE=$(curl -s "$URL")

    if [ "$RESPONSE" == "OK" ]; then
        log "Updated $DOMAIN successfully"
    else
        log "Failed to update $DOMAIN: $RESPONSE"
    fi
done

• crontab -e

*/5 * * * * /var/local/duckdns/updater.sh >/dev/null 2>&1

NO-IP

Ubuntu 16.04 server

sudo apt install ddclient

/etc/ddclient.conf example

## ddclient configuration file
   daemon=600
   # check every 600 seconds
   syslog=yes
   # log update msgs to syslog
   mail-failure=redteam@bbva.com # Mail failed updates to user
   pid=/var/run/ddclient.pid
   # record PID in file.
   ssl=yes
   # use HTTPS
   ## Detect IP with our CheckIP server
   use=web, web=checkip.dyndns.com/, web-skip='IP Address'
   ## DynDNS username and password here
   login=RedTeam
   password=##YOUR PASSWORD##
   ## Default options
   protocol=dyndns2
   server=members.dyndns.org
   ## Dynamic DNS hosts
   rrafara.dyndns.org

Restart ddclient service