mirror of https://github.com/zulip/zulip.git
38 lines
1019 B
Plaintext
38 lines
1019 B
Plaintext
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*filter
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# Set up logging for dropped packets
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-N LOGDROP
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-A LOGDROP -m limit --limit 15/min -j LOG --log-prefix "iptables dropped: " --log-level 7
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-A LOGDROP -j DROP
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# Allow all outbound traffic
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-A OUTPUT -j ACCEPT
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# Accept all loopback traffic
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-A INPUT -i lo -j ACCEPT
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# Drop all traffic to loopback IPs on other interfaces
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-A INPUT ! -i lo -d 127.0.0.0/8 -j LOGDROP
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# Accept incoming traffic related to established connections
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-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
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# Accept incoming traffic on TCP port 22 (SSH)
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-A INPUT -p tcp --dport 22 -j ACCEPT
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# Accept incoming traffic on UDP port 2104 (zhm)
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-A INPUT -p udp --dport 2104 -j ACCEPT
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# It's hard to know what ephemeral ports the zephyr clients are listening on.
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# Apparently they do not send outgoing traffic sufficient for the
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# ESTABLISHED,RELATED rule above. So for now we allow all UDP traffic.
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#
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# FIXME: do something better here.
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-A INPUT -p udp -j ACCEPT
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# Drop everything else
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-A INPUT -j LOGDROP
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-A FORWARD -j LOGDROP
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COMMIT
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