General Iptables Firewall Rules

1. Delete all existing rules# iptables -F 2. Set default chain policies# iptables -P INPUT DROP# iptables -P FORWARD DROP# iptables -P OUTPUT DROP 3. Block a specific ip-addressBLOCK_THIS_IP=”x.x.x.x”# iptables -A INPUT -s “$BLOCK_THIS_IP” -j DRO...