Iptables: How to allow only one ip through specific port? https://serverfault.com/questions/146569/iptables-how-to-allow-only-one-ip-through-specific-port http

Iptables: How to allow only one ip through specific port? https://serverfault.com/questions/146569/iptables-how-to-allow-only-one-ip-through-specific-port https://serverfault.com/questions/146569/iptables-how-to-all... Found that by Googling [iptables whitelist by IP and port]. ___ Another approach is Port Knocking: https://en.m.wikipedia.org/wiki/Port_knocking https://en.m.wikipedia.org/wiki/Port_knocking That said, likely more complex than the solution you’re looking for; also worth mentioning that unless you use the variant called single packet authorization (SPA), where only a single "knock" is needed, consisting of an encrypted packet — the port knocking sequence in theory is observable and reproducible by an attacker.