47 lines
991 B
Bash
Executable File
47 lines
991 B
Bash
Executable File
#!/bin/sh
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set -e
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apt-get -y install nftables
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systemctl enable nftables
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printf \
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'#!/usr/sbin/nft -f
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flush ruleset
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table inet filter {
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chain input {
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type filter hook input priority 0; policy drop;
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# loopback
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iifname lo accept
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# established/related connections
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ct state established,related accept
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# invalid connections
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ct state invalid drop
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# no ping floods
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ip protocol icmp icmp type echo-request limit rate 1/second accept
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ip6 nexthdr icmpv6 icmpv6 type echo-request limit rate 1/second accept
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# HTTP and HTTPS
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tcp dport 80 ct state new limit rate 10/second accept
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tcp dport 443 ct state new limit rate 100/second accept
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# SSH from MiA/MiB
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tcp dport 22 ip saddr 83.149.165.216/29 ct state new limit rate 2/second accept
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}
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chain forward {
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type filter hook forward priority 0; policy drop;
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}
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chain output {
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type filter hook output priority 0; policy accept;
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# no SSH
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tcp dport 22 drop
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}
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}' > /etc/nftables.conf
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systemctl restart nftables
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