<?php $myhostname = gethostbyaddr(file_get_contents("https://ipv4.apimon.de/")); echo "Detected hostname: $myhostname\n"; passthru("certbot certonly -m letsencrypt@sai.navy --agree-tos -d $myhostname --manual --preferred-challenges dns"); copy("/etc/letsencrypt/live/$myhostname/chain.pem", "/etc/ipsec.d/cacerts/chain.pem"); passthru("ipsec reload");