69 lines
2.1 KiB
Nix
69 lines
2.1 KiB
Nix
{ pkgs, ... }:
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{
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environment.systemPackages = with pkgs; [
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kdePackages.kwallet-pam
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bitwarden
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];
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security = {
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sudo.execWheelOnly = true;
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acme.acceptTerms = true;
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polkit.enable = true;
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pam = {
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u2f = {
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enable = true;
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settings.cue = true;
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};
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services.kwallet = {
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name = "kwallet";
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enableKwallet = true;
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};
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};
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};
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networking.firewall.enable = true;
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programs.gnupg.agent.enable = true;
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boot = {
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loader.systemd-boot = {
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editor = false;
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configurationLimit = 50;
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};
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kernelModules = [ "tcp_bbr" ];
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kernel.sysctl = {
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## TCP hardening
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# Prevent bogus ICMP errors from filling up logs.
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"net.ipv4.icmp_ignore_bogus_error_responses" = 1;
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# Reverse path filtering causes the kernel to do source validation of
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# packets received from all interfaces. This can mitigate IP spoofing.
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"net.ipv4.conf.default.rp_filter" = 1;
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"net.ipv4.conf.all.rp_filter" = 1;
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# Do not accept IP source route packets (we're not a router)
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"net.ipv4.conf.all.accept_source_route" = 0;
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"net.ipv6.conf.all.accept_source_route" = 0;
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# Don't send ICMP redirects (again, we're on a router)
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"net.ipv4.conf.all.send_redirects" = 0;
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"net.ipv4.conf.default.send_redirects" = 0;
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# Refuse ICMP redirects (MITM mitigations)
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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.ipv4.conf.default.secure_redirects" = 0;
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"net.ipv6.conf.all.accept_redirects" = 0;
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"net.ipv6.conf.default.accept_redirects" = 0;
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# Protects against SYN flood attacks
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"net.ipv4.tcp_syncookies" = 1;
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# Incomplete protection again TIME-WAIT assassination
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"net.ipv4.tcp_rfc1337" = 1;
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## TCP optimization
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# Enable TCP Fast Open for incoming and outgoing connections
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"net.ipv4.tcp_fastopen" = 3;
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# Bufferbloat mitigations + slight improvement in throughput & latency
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"net.ipv4.tcp_congestion_control" = "bbr";
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"net.core.default_qdisc" = "cake";
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};
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};
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}
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