Create dynroute.sh

Set non persistent routes for any DNS oder DYNDNS Hostname to remove your Gatway for security Reasons

dynroute.sh

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+# DDNS Name und Gateway
+# usage dynroute.sh ddnsname yourgatewayrouter
+# assuming a shutdown after usage, old routes will "not" be deleted
+DDNS_HOSTNAME=$1
+GATEWAY=$2
+
+#DNS via One
+ip route add 1.1.1.1 via 192.168.66.1
+echo "nameserver 1.1.1.1" > /etc/resolv.conf
+
+# ddns auflösen
+CURRENT_IP=$(dig +short $DDNS_HOSTNAME)
+if [[ -z "$CURRENT_IP" ]]; then
+    echo "Failed to resolve IP for $DDNS_HOSTNAME"
+    exit 1
+fi
+# route setzen
+ip route add  $CURRENT_IP via $GATEWAY