[humanpuff69]

Hmmm so there is no solution to fix or edit that command, is that i missed something? because i didn't edit any command from that site. what i really need a solution.

iptables -A INPUT -p udp --dport 7777 -m limit --limit 6/s --limit-burst 12 -j DROP

DROP is making iptables drop the connection on that specific rules if the condition is true
that is probably ddos protection sort of . you can delete that if you find your packet get dropping . to remove it you can

iptables -D INPUT -p udp --dport 7777 -m limit --limit 6/s --limit-burst 12 -j DROP