Created
April 18, 2017 12:40
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*filter | |
:INPUT DROP [0:0] | |
:FORWARD DROP [0:0] | |
:OUTPUT DROP [0:0] | |
# Accept any related or established connections | |
-I INPUT 1 -m state --state RELATED,ESTABLISHED -j ACCEPT | |
-I OUTPUT 1 -m state --state RELATED,ESTABLISHED -j ACCEPT | |
# Allow all traffic on the loopback interface | |
-A INPUT -i lo -j ACCEPT | |
-A OUTPUT -o lo -j ACCEPT | |
# Allow outbound DHCP request - Some hosts (Linode) automatically assign the primary IP | |
-A OUTPUT -p udp --dport 67:68 --sport 67:68 -j ACCEPT | |
# Outbound DNS lookups | |
-A OUTPUT -o eth0 -p udp -m udp --dport 53 -j ACCEPT | |
# Outbound PING requests | |
-A OUTPUT -p icmp -j ACCEPT | |
# Outbound Network Time Protocol (NTP) request | |
-A OUTPUT -p udp --dport 123 --sport 123 -j ACCEPT | |
# SSH | |
-A INPUT -i eth0 -p tcp -m tcp --dport 222 -m state --state NEW -j ACCEPT | |
# Outbound HTTP | |
-A OUTPUT -o eth0 -p tcp -m tcp --dport 80 -m state --state NEW -j ACCEPT | |
-A OUTPUT -o eth0 -p tcp -m tcp --dport 443 -m state --state NEW -j ACCEPT | |
# Inbound HTTP | |
-A INPUT -m state --state NEW -p tcp --dport 80 -j ACCEPT | |
-A INPUT -m state --state NEW -p tcp --dport 443 -j ACCEPT | |
COMMIT |
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