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added fail2ban

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This commit is contained in:
Leyla Becker 2025-01-06 14:06:26 -06:00
parent 84698ba68b
commit 46fd27f768
4 changed files with 102 additions and 0 deletions
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1
modules/nixos-modules/server/default.nix
View file

@ -1,5 +1,6 @@
{...}: {
imports = [
./fail2ban.nix
./network_storage
./reverse_proxy.nix
./postgres.nix

90
modules/nixos-modules/server/fail2ban.nix Normal file
View file

@ -0,0 +1,90 @@
{
lib,
config,
...
}: {
options.host.fail2ban = {
enable = lib.mkEnableOption "should fail 2 ban be enabled on this server";
};
config = lib.mkIf config.host.fail2ban.enable (lib.mkMerge [
{
services.fail2ban = {
enable = true;
maxretry = 5;
ignoreIP = [
# Whitelist local networks
"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)";
maxtime = "168h"; # Do not ban for more than 1 week
overalljails = true; # Calculate the ban time based on all the violations
};
jails = {
nginx-iptables.settings = lib.mkIf config.services.nginx.enable {
filter = "nginx";
action = ''iptables-multiport[name=HTTP, port="http,https"]'';
backend = "auto";
failregex = "limiting requests, excess:.* by zone.*client: <HOST>";
findtime = 600;
bantime = 600;
maxretry = 5;
};
jellyfin-iptables.settings = lib.mkIf config.services.jellyfin.enable {
filter = "jellyfin";
action = ''iptables-multiport[name=HTTP, port="http,https"]'';
logpath = "${config.services.jellyfin.dataDir}/log/*.log";
backend = "auto";
failregex = "^.*Authentication request for .* has been denied \\\(IP: \"<ADDR>\"\\\)\\\.";
findtime = 600;
bantime = 600;
maxretry = 5;
};
nextcloud-iptables.settings = lib.mkIf config.services.nextcloud.enable {
filter = "nextcloud";
action = ''iptables-multiport[name=HTTP, port="http,https"]'';
logpath = "${config.services.nextcloud.datadir}/*.log";
backend = "auto";
failregex = ''
^{"reqId":".*","remoteAddr":".*","app":"core","message":"Login failed: '.*' \(Remote IP: '<HOST>'\)","level":2,"time":".*"}$
^{"reqId":".*","level":2,"time":".*","remoteAddr":".*","user,:".*","app":"no app in context".*","method":".*","message":"Login failed: '.*' \(Remote IP: '<HOST>'\)".*}$
^{"reqId":".*","level":2,"time":".*","remoteAddr":".*","user":".*","app":".*","method":".*","url":".*","message":"Login failed: .* \(Remote IP: <HOST>\).*}$
'';
findtime = 600;
bantime = 600;
maxretry = 5;
};
forgejo-iptables.settings = lib.mkIf config.services.forgejo.enable {
filter = "forgejo";
action = ''iptables-multiport[name=HTTP, port="http,https"]'';
logpath = "${config.services.forgejo.stateDir}/log/*.log";
backend = "auto";
failregex = ".*(Failed authentication attempt|invalid credentials|Attempted access of unknown user).* from <HOST>";
findtime = 600;
bantime = 600;
maxretry = 5;
};
home-assistant-iptables.settings = lib.mkIf config.services.home-assistant.enable {
filter = "home-assistant";
action = ''iptables-multiport[name=HTTP, port="http,https"]'';
logpath = "${config.services.home-assistant.configDir}/*.log";
backend = "auto";
failregex = "^%(__prefix_line)s.*Login attempt or request with invalid authentication from <HOST>.*$";
findtime = 600;
bantime = 600;
maxretry = 5;
};
# TODO; figure out if there is any fail2ban things we can do on searx
# searx-iptables.settings = lib.mkIf config.services.searx.enable {};
};
};
}
(lib.mkIf config.host.impermanence.enable {
})
]);
}

8
modules/nixos-modules/server/nextcloud.nix
View file

@ -32,6 +32,7 @@ in {
enable = true;
package = pkgs.nextcloud30;
hostName = "${config.host.nextcloud.subdomain}.${config.host.reverse_proxy.hostname}";
settings.log_type = "file";
config = {
adminpassFile = config.sops.secrets."services/nextcloud_adminpass".path;
};
@ -39,6 +40,13 @@ in {
};
}
(lib.mkIf config.host.impermanence.enable {
assertions = [
{
assertion = config.services.nextcloud.datadir == dataDir;
message = "nextcloud data directory does not match persistence";
}
];
environment.persistence."/persist/system/root" = {
enable = true;
hideMounts = true;