27 lines
530 B
Plaintext
27 lines
530 B
Plaintext
#!/usr/bin/nft
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flush ruleset
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define SSH_PORT1 = 22
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define SSH_PORT2 = 8022
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table ip filter {
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set allowed_tcp_ports {
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type inet_service;
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flags constant;
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elements = { $SSH_PORT1, $SSH_PORT2 };
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}
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chain in {
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type filter hook input priority filter; policy drop;
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ct state invalid drop;
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ct state {related,established} accept;
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tcp dport @allowed_tcp_ports accept;
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}
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chain forward {
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type filter hook forward priority filter; policy drop;
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}
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chain out {
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type filter hook output priority filter; policy drop;
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}
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}
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