Dynamic A-Record DNS Updater for united-domains.de (OpenWRT/LEDE)

ddns_ud.sh

#!/bin/sh
# requires: wget, ca-certificates, grep
#rm /tmp/cookies.txt

cookiefile="/tmp/cookies.txt"

#domain should contain "domain_id-record_id"
domain_id=$(echo $domain | tr "-" "\n" | sed -n "1p")
record_id=$(echo $domain | tr "-" "\n" | sed -n "2p")

#csrf tokens for login + language xmlhttprequest required to login (nice try blocking my API access, UD)
loginpage=$(/usr/bin/wget --save-cookies $cookiefile --keep-session-cookies --delete-after -qO- "https://www.united-domains.de/login/")
csrf=$(echo "$loginpage" | /bin/grep -oP -m 2 "(?<=<input type=\"hidden\" name=\"csrf\" value=\")[^\"]*(?=\"( /)?>)" | tail -1)
csrfmeta=$(echo "$loginpage" | /bin/grep -oP -m 1 "(?<=<meta name=\"csrf\" content=\")[^\"]*(?=\"( /)?>)")
csrfscript=$(echo "$loginpage" | /bin/grep -oP -m 1 "(?<=\"CSRF_TOKEN\":\")[^\"]*(?=\")")
/usr/bin/wget --load-cookies $cookiefile --save-cookies $cookiefile --keep-session-cookies --delete-after --post-data "language=en-US" --header="HTTP-X-CSRF-TOKEN: $csrfmeta" --header="X-Csrf-Token: $csrfscript" --header="X-Requested-With: XMLHttpRequest" -qO- "https://www.united-domains.de/set-user-language"

ipv4=$1

#login
echo 'login'
loginresp=$(/usr/bin/wget --load-cookies $cookiefile --save-cookies $cookiefile --keep-session-cookies --post-data "csrf=$csrf&email=$username&pwd=$password&selector=login&loginBtn=Login" -qO- "https://www.united-domains.de/login/")

#get current dns record json object & modify ip
record=$(/usr/bin/wget --load-cookies $cookiefile --save-cookies $cookiefile --keep-session-cookies -qO- "https://www.united-domains.de/pfapi/dns/domain/$domain_id/records" | jsonfilter -e "$[\"data\"][\"A\"][@.id=$record_id]" | sed "s/ //g" | sed "s/\"address\":\"[0-9.]\+\"/\"address\":\"$ipv4\"/g")

payload="{\"record\":$record,\"domain_lock_state\":{\"domain_locked\":false,\"email_locked\":false}}"
url="https://www.united-domains.de/pfapi/dns/domain/$domain_id/records"

#send changes
output=$(/usr/bin/wget --load-cookies $cookiefile --method=PUT --header=Content-Type:application/json --header="Http-X-Csrf-Token: $csrf" --body-data=$payload -qO- $url 2>&1)
echo "UD answered: $output"
write_log 7 "UD answered:\n$output"

echo $output | /usr/grep "$ipv4" >/dev/null 2>&1
success=$?
#write_log 7 "Retval: $success"
echo "Retval: $success"
return $success

Hi @izphi78,
where did you go?
I'm severly thinking about moving my domain to another hoster, that offers an API.

I'm fed up with with that scripting stuff. The shell script here worked for a while, but United Domains seem to permanently change their website. For a while I worked around this with a python script, but even this fails more and more often, because of permanent changes in the html/css code of UD.
This is extremely annoying!
Can you recommend me a good hoster, that has an API?

@rapkin61 FWIW, inwx was recommended to me by a friend, specifically for API access

@rapkin61 I went to cloudflare. No need to transfer your Domain. Just add it to the Dashboard and set the NS records. If you want to keep mail functionality, set it accordingly in the UD settings and set the MX records as shown in the instructions.

Never had any trouble with it after going that route. And much stuff has integration for Cloudflare like certbot.