Restrict Icecast2 stream using Geo-IP restriction by continent or country
Requires Maxmind GeoIP/PHP library installed (usually sudo apt install php-geoip)
Place icecast-geoipcheck.php somewhere in your web server root (eg /var/www/html/)
Modify /etc/icecast2/icecast.xml:
<mount type="normal">
<mount-name>/stream</mount-name>
<username>source</username>
<password>hackme</password>
<authentication type="url">
<option name="listener_add" value="http://localhost/icecast-geoipcheck.php" />
<option name="auth_header" value="icecast-auth-user: 1" />
</authentication>
</mount>