Externe IP-Adresse
Öffentliche IP-Adresse ermitteln
$ wget -O - -q icanhazip.com 1.2.3.4
$ curl -L -s --max-time 10 http://checkip.dyndns.org | grep -Eo -m 1 '(digit:{1,3}.){3}digit:{1,3}'
$ wget -O - -q icanhazip.com 1.2.3.4
$ curl -L -s --max-time 10 http://checkip.dyndns.org | grep -Eo -m 1 '(digit:{1,3}.){3}digit:{1,3}'