41 lines
1.1 KiB
Nix
41 lines
1.1 KiB
Nix
{ config, lib, ... }:
|
|
let
|
|
cfg = config.profile.openssh;
|
|
in
|
|
{
|
|
config = lib.mkIf cfg.enable {
|
|
networking.firewall = {
|
|
allowedTCPPorts = lib.mkAfter [ 22 ];
|
|
};
|
|
services.openssh = {
|
|
enable = true;
|
|
settings = {
|
|
PasswordAuthentication = false;
|
|
KbdInteractiveAuthentication = false;
|
|
UseDns = false;
|
|
X11Forwarding = false;
|
|
PermitRootLogin = "no";
|
|
};
|
|
};
|
|
services.fail2ban = {
|
|
enable = true;
|
|
# Ban IP after 5 failures
|
|
maxretry = 5;
|
|
ignoreIP = [
|
|
# Whitelist some subnets
|
|
"10.0.0.0/8"
|
|
"172.16.0.0/12"
|
|
"192.168.0.0/16"
|
|
];
|
|
bantime = "24h"; # Ban IPs for one day on the first ban
|
|
bantime-increment = {
|
|
enable = true; # Enable increment of bantime after each violation
|
|
# formula = "ban.Time * math.exp(float(ban.Count+1)*banFactor)/math.exp(1*banFactor)";
|
|
multipliers = "1 2 4 8 16 32 64";
|
|
maxtime = "168h"; # Do not ban for more than 1 week
|
|
overalljails = true; # Calculate the bantime based on all the violations
|
|
};
|
|
};
|
|
};
|
|
}
|