```bash iptables -A INPUT -p tcp --dport 3306 -s 135.181.138.163 -j ACCEPT iptables -A INPUT -p tcp --dport 3306 -s 61.19.42.229 -j ACCEPT iptables -A INPUT -p tcp --dport 3306 -j DROP # To drop all other connections ``` tags: iptablerules

https://www.compilenrun.com/docs/os/debian/debian-security/debian-firewall-configuration/

to see all rules ``` iptables -L -n -v ``` 21.10.25

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