2021-04-11 19:02:40 +02:00
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*filter
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2022-08-03 16:29:06 +02:00
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:INPUT DROP [0:0]
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:FORWARD DROP [0:0]
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:OUTPUT ACCEPT [0:0]
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2021-04-11 19:02:40 +02:00
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-A INPUT -i lo -j ACCEPT
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-A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
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-A INPUT -m conntrack --ctstate INVALID -j DROP
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-A INPUT -p tcp -m tcp --dport 22 -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT
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-A OUTPUT -o lo -j ACCEPT
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-A OUTPUT -m conntrack --ctstate ESTABLISHED -j ACCEPT
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-A OUTPUT -p tcp -m tcp --sport 22 -m conntrack --ctstate ESTABLISHED -j ACCEPT
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-A OUTPUT -p tcp -m tcp --dport 25 -j REJECT --reject-with icmp-port-unreachable
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COMMIT
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