*filter # Allow all loopback (lo0) traffic and drop all traffic to 127/8 that doesn't use lo0 -A INPUT -i lo -j ACCEPT -A INPUT ! -i lo -d ::1/128 -j REJECT # Accept all established inbound connections -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT # Allow all outbound traffic - you can modify this to only allow certain traffic -A OUTPUT -j ACCEPT # Allow HTTP and HTTPS connections from anywhere (the normal ports for websites and SSL). -A INPUT -p tcp --dport 80 -j ACCEPT -A INPUT -p tcp --dport 443 -j ACCEPT # (optional) Allow HTTP/3 connections from anywhere. -A INPUT -p udp --dport 443 -j ACCEPT # Allow SSH connections # The -dport number should be the same port number you set in sshd_config -A INPUT -p tcp -m state --state NEW --dport 23230 -j ACCEPT # Allow ping -A INPUT -p icmpv6 -j ACCEPT # Log iptables denied calls -A INPUT -m limit --limit 5/min -j LOG --log-prefix "iptables denied: " --log-level 7 # Reject all other inbound - default deny unless explicitly allowed policy -A INPUT -j REJECT -A FORWARD -j REJECT COMMIT /etc/letsencrypt/live/mastadon.waynehayesdevelopment.com/fullchain.pem /etc/letsencrypt/live/mastadon.waynehayesdevelopment.com/privkey.pem