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Merge pull request #54495 from peterhoeg/f/sshguard

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nixos/sshguard: fix syslog identifiers and pid file
This commit is contained in:
Silvan Mosberger 2019-01-29 09:35:36 +01:00 committed by GitHub
commit f73df1862c
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1 changed files with 48 additions and 47 deletions
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95
nixos/modules/services/security/sshguard.nix
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@ -4,6 +4,7 @@ with lib;
let
cfg = config.services.sshguard;
in {
###### interface
@ -77,65 +78,65 @@ in {
Systemd services sshguard should receive logs of.
'';
};
};
};
###### implementation
config = mkIf cfg.enable {
environment.systemPackages = [ pkgs.sshguard pkgs.iptables pkgs.ipset ];
environment.etc."sshguard.conf".text = let
list_services = ( name: "-t ${name} ");
in ''
BACKEND="${pkgs.sshguard}/libexec/sshg-fw-ipset"
LOGREADER="LANG=C ${pkgs.systemd}/bin/journalctl -afb -p info -n1 ${toString (map list_services cfg.services)} -o cat"
args = lib.concatStringsSep " " ([
"-afb"
"-p info"
"-o cat"
"-n1"
] ++ (map (name: "-t ${escapeShellArg name}") cfg.services));
in ''
BACKEND="${pkgs.sshguard}/libexec/sshg-fw-ipset"
LOGREADER="LANG=C ${pkgs.systemd}/bin/journalctl ${args}"
'';
systemd.services.sshguard = {
description = "SSHGuard brute-force attacks protection system";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
partOf = optional config.networking.firewall.enable "firewall.service";
path = with pkgs; [ iptables ipset iproute systemd ];
postStart = ''
${pkgs.ipset}/bin/ipset -quiet create -exist sshguard4 hash:ip family inet
${pkgs.ipset}/bin/ipset -quiet create -exist sshguard6 hash:ip family inet6
${pkgs.iptables}/bin/iptables -I INPUT -m set --match-set sshguard4 src -j DROP
${pkgs.iptables}/bin/ip6tables -I INPUT -m set --match-set sshguard6 src -j DROP
'';
systemd.services.sshguard =
{ description = "SSHGuard brute-force attacks protection system";
preStop = ''
${pkgs.iptables}/bin/iptables -D INPUT -m set --match-set sshguard4 src -j DROP
${pkgs.iptables}/bin/ip6tables -D INPUT -m set --match-set sshguard6 src -j DROP
'';
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
partOf = optional config.networking.firewall.enable "firewall.service";
unitConfig.Documentation = "man:sshguard(8)";
path = [ pkgs.iptables pkgs.ipset pkgs.iproute pkgs.systemd ];
postStart = ''
mkdir -p /var/lib/sshguard
${pkgs.ipset}/bin/ipset -quiet create -exist sshguard4 hash:ip family inet
${pkgs.ipset}/bin/ipset -quiet create -exist sshguard6 hash:ip family inet6
${pkgs.iptables}/bin/iptables -I INPUT -m set --match-set sshguard4 src -j DROP
${pkgs.iptables}/bin/ip6tables -I INPUT -m set --match-set sshguard6 src -j DROP
'';
preStop = ''
${pkgs.iptables}/bin/iptables -D INPUT -m set --match-set sshguard4 src -j DROP
${pkgs.iptables}/bin/ip6tables -D INPUT -m set --match-set sshguard6 src -j DROP
'';
unitConfig.Documentation = "man:sshguard(8)";
serviceConfig = {
Type = "simple";
ExecStart = let
list_whitelist = ( name: "-w ${name} ");
in ''
${pkgs.sshguard}/bin/sshguard -a ${toString cfg.attack_threshold} ${optionalString (cfg.blacklist_threshold != null) "-b ${toString cfg.blacklist_threshold}:${cfg.blacklist_file} "}-i /run/sshguard/sshguard.pid -p ${toString cfg.blocktime} -s ${toString cfg.detection_time} ${toString (map list_whitelist cfg.whitelist)}
'';
PIDFile = "/run/sshguard/sshguard.pid";
Restart = "always";
ReadOnlyDirectories = "/";
ReadWriteDirectories = "/run/sshguard /var/lib/sshguard";
RuntimeDirectory = "sshguard";
StateDirectory = "sshguard";
CapabilityBoundingSet = "CAP_NET_ADMIN CAP_NET_RAW";
};
serviceConfig = {
Type = "simple";
ExecStart = let
args = lib.concatStringsSep " " ([
"-a ${toString cfg.attack_threshold}"
"-p ${toString cfg.blocktime}"
"-s ${toString cfg.detection_time}"
(optionalString (cfg.blacklist_threshold != null) "-b ${toString cfg.blacklist_threshold}:${cfg.blacklist_file}")
] ++ (map (name: "-w ${escapeShellArg name}") cfg.whitelist));
in "${pkgs.sshguard}/bin/sshguard ${args}";
Restart = "always";
ProtectSystem = "strict";
ProtectHome = "tmpfs";
RuntimeDirectory = "sshguard";
StateDirectory = "sshguard";
CapabilityBoundingSet = "CAP_NET_ADMIN CAP_NET_RAW";
};
};
};
}