nix/module/Kernel.nix

77 lines
2 KiB
Nix

{ pkgs, config, lib, ... }: with lib; let
cfg = config.module.kernel;
in {
options = {
module.kernel = {
latest = mkOption {
default = true;
type = types.bool;
};
};
};
config = mkMerge [
(mkIf cfg.latest {
# Use latest kernel.
boot.kernelPackages = pkgs.linuxPackages_latest;
})
{
boot.kernel.sysctl = {
# # Spoof protection.
# "net.ipv4.conf.default.rp_filter" = 1;
# "net.ipv4.conf.all.rp_filter" = 1;
# # Packet forwarding.
# "net.ipv4.ip_forward" = 0;
# "net.ipv6.conf.all.forwarding" = 1;
# # MITM protection.
# "net.ipv4.conf.all.accept_redirects" = 0;
# "net.ipv6.conf.all.accept_redirects" = 0;
# # Do not send ICMP redirects (we are not a router).
# "net.ipv4.conf.all.send_redirects" = 0;
# # Do not accept IP source route packets (we are not a router).
# "net.ipv4.conf.all.accept_source_route" = 0;
# "net.ipv6.conf.all.accept_source_route" = 0;
# Allow sysrq.
"kernel.sysrq" = 1;
# # Protect filesystem links.
# "fs.protected_hardlinks" = 0;
# "fs.protected_symlinks" = 0;
# # Specify ttl.
# "net.ipv4.ip_default_ttl" = 65;
# # Lynis config.
# "kernel.core_uses_pid" = 1;
# "kernel.kptr_restrict" = 2;
# # IP hardening.
# "net.ipv4.conf.all.log_martians" = 1;
# "net.ipv4.conf.default.accept_redirects" = 0;
# "net.ipv4.conf.default.accept_source_route" = 0;
# "net.ipv4.conf.default.log_martians" = 0;
# "net.ipv4.tcp_timestamps" = 0;
# "net.ipv6.conf.default.accept_redirects" = 0;
# Increase file watchers.
"fs.inotify.max_user_instances" = 9999999;
"fs.inotify.max_user_watches" = 9999999;
"fs.inotify.max_user_event" = 9999999;
# "fs.file-max" = 999999;
# # Disable ipv6.
# "net.ipv6.conf.all.disable_ipv6" = 1;
# "net.ipv6.conf.default.disable_ipv6" = 1;
# "net.ipv6.conf.lo.disable_ipv6" = 1;
# "net.ipv6.conf.eth0.disable_ipv6" = 1;
};
}
];
}