Use OpenDNS

These ports alone aren't actually working for me (nice iptables config though). Nevermind SSH (that ones nice and simple, I already have that set up) as you said I allowed all ICMP for ping. And thanks to this I can now ping my DNS server directly. However ping does not work with this configuration. DNS UDP Ports - Dec 18, 2015 Free and Public DNS Server List (Valid July 2020) Jul 01, 2020 10 Best DNS Servers in 2020 (Free and Public) | Beebom Cloudflare DNS. Cloudflare is one of the world’s topmost company working in the web performance …

Dec 18, 2015

How dangerous is it to open my DNS server to the world? Any open port increases the attack surface, in theory. Your LAN could be at risk if a serious vulnerability is found in whatever DNS software you use. The biggest risk is that your DNS server becomes an unwitting participant in DNS amplification attacks. Your home connection could also be flooded with bad traffic and become unavailable due to Which ports should be open in firewall on a Plesk server Jul 14, 2020

Configure DNS and Firewall Settings | Microsoft Docs

Jul 13, 2019