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https://github.com/anotherhadi/nixy.git
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Hadi
36 lines
1002 B
Nix
36 lines
1002 B
Nix
# Kernel hardening for the server
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{
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boot.kernel.sysctl = {
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# Restrict access to kernel logs and pointers
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"kernel.dmesg_restrict" = 1;
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"kernel.kptr_restrict" = 2;
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# BPF hardening
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"net.core.bpf_jit_harden" = 2;
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"kernel.unprivileged_bpf_disabled" = 1;
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# Reverse path filtering (anti-spoofing)
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"net.ipv4.conf.all.rp_filter" = 1;
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"net.ipv4.conf.default.rp_filter" = 1;
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# SYN flood protection
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"net.ipv4.tcp_syncookies" = 1;
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# Disable IP source routing
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"net.ipv4.conf.all.accept_source_route" = 0;
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"net.ipv4.conf.default.accept_source_route" = 0;
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# Ignore ICMP redirects (prevent MITM)
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"net.ipv4.conf.all.accept_redirects" = 0;
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"net.ipv4.conf.default.accept_redirects" = 0;
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"net.ipv4.conf.all.secure_redirects" = 0;
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"net.ipv6.conf.all.accept_redirects" = 0;
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# Don't send ICMP redirects
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"net.ipv4.conf.all.send_redirects" = 0;
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# Restrict ptrace to parent processes only
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"kernel.yama.ptrace_scope" = 1;
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};
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}
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