63 lines
1.4 KiB
Nix
63 lines
1.4 KiB
Nix
{
|
|
config,
|
|
lib,
|
|
pkgsUnstable,
|
|
...
|
|
}: let
|
|
cfg = config.module.kernel;
|
|
in {
|
|
config = lib.mkIf cfg.enable (lib.mkMerge [
|
|
{
|
|
boot.kernel.sysctl = {
|
|
# Allow sysrq.
|
|
"kernel.sysrq" = 1;
|
|
|
|
# Increase file watchers.
|
|
"fs.inotify.max_user_event" = 9999999;
|
|
"fs.inotify.max_user_instances" = 9999999;
|
|
"fs.inotify.max_user_watches" = 9999999;
|
|
# "fs.file-max" = 999999;
|
|
};
|
|
}
|
|
|
|
(lib.mkIf cfg.hardening {
|
|
boot.kernel.sysctl = {
|
|
# Spoof protection.
|
|
"net.ipv4.conf.all.rp_filter" = 1;
|
|
"net.ipv4.conf.default.rp_filter" = 1;
|
|
|
|
# Packet forwarding.
|
|
"net.ipv4.ip_forward" = 0;
|
|
"net.ipv6.conf.all.forwarding" = 0;
|
|
|
|
# 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;
|
|
|
|
# Protect filesystem links.
|
|
"fs.protected_hardlinks" = 0;
|
|
"fs.protected_symlinks" = 0;
|
|
|
|
# Lynis config.
|
|
"kernel.core_uses_pid" = 1;
|
|
"kernel.kptr_restrict" = 2;
|
|
};
|
|
})
|
|
|
|
(lib.mkIf cfg.hotspotTtlBypass {
|
|
boot.kernel.sysctl."net.ipv4.ip_default_ttl" = 65;
|
|
})
|
|
|
|
(lib.mkIf cfg.latest {
|
|
boot.kernelPackages = pkgsUnstable.linuxPackages_latest;
|
|
})
|
|
]);
|
|
}
|