Simple make iptables rule for block country ip adress.. https://www.cyberciti.biz/faq/block-entier-country-using-iptables/ this should help.
"iptables geoip patch"Where exactly do I need to edit? For example, I do not want access from the Netherlands and America.
https://www.maxmind.com/en/geoip2-precision-country-service also try reading this, it is helpful.Where exactly do I need to edit? For example, I do not want access from the Netherlands and America.
Well if you want only in teamspeak u can use it and more easy for you.Found this on GitHub, maybe worth a try: https://github.com/DrOpossum/TeamSpeak-Countryfilter