diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index dea0ca13565..4f93e1f361d 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -806,6 +806,7 @@
   ./services/networking/smartdns.nix
   ./services/networking/smokeping.nix
   ./services/networking/softether.nix
+  ./services/networking/solanum.nix
   ./services/networking/spacecookie.nix
   ./services/networking/spiped.nix
   ./services/networking/squid.nix
diff --git a/nixos/modules/services/networking/solanum.nix b/nixos/modules/services/networking/solanum.nix
new file mode 100644
index 00000000000..989621b204c
--- /dev/null
+++ b/nixos/modules/services/networking/solanum.nix
@@ -0,0 +1,104 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (lib) mkEnableOption mkIf mkOption types;
+  inherit (pkgs) solanum;
+  cfg = config.services.solanum;
+
+  configFile = pkgs.writeText "solanum.conf" cfg.config;
+in
+
+{
+
+  ###### interface
+
+  options = {
+
+    services.solanum = {
+
+      enable = mkEnableOption "Solanum IRC daemon";
+
+      config = mkOption {
+        type = types.str;
+        default = ''
+          serverinfo {
+            name = "irc.example.com";
+            sid = "1ix";
+            description = "irc!";
+
+            vhost = "0.0.0.0";
+            vhost6 = "::";
+          };
+
+          listen {
+            host = "0.0.0.0";
+            port = 6667;
+          };
+
+          auth {
+            user = "*@*";
+            class = "users";
+            flags = exceed_limit;
+          };
+          channel {
+            default_split_user_count = 0;
+          };
+        '';
+        description = ''
+          Solanum IRC daemon configuration file.
+          check <link xlink:href="https://github.com/solanum-ircd/solanum/blob/main/doc/reference.conf"/> for all options.
+        '';
+      };
+
+      openFilesLimit = mkOption {
+        type = types.int;
+        default = 1024;
+        description = ''
+          Maximum number of open files. Limits the clients and server connections.
+        '';
+      };
+
+      motd = mkOption {
+        type = types.nullOr types.lines;
+        default = null;
+        description = ''
+          Solanum MOTD text.
+
+          Solanum will read its MOTD from <literal>/etc/solanum/ircd.motd</literal>.
+          If set, the value of this option will be written to this path.
+        '';
+      };
+
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf cfg.enable (lib.mkMerge [
+    {
+      systemd.services.solanum = {
+        description = "Solanum IRC daemon";
+        after = [ "network.target" ];
+        wantedBy = [ "multi-user.target" ];
+        environment = {
+          BANDB_DBPATH = "/var/lib/solanum/ban.db";
+        };
+        serviceConfig = {
+          ExecStart   = "${solanum}/bin/solanum -foreground -logfile /dev/stdout -configfile ${configFile} -pidfile /run/solanum/ircd.pid";
+          DynamicUser = true;
+          User = "solanum";
+          StateDirectory = "solanum";
+          RuntimeDirectory = "solanum";
+          LimitNOFILE = "${toString cfg.openFilesLimit}";
+        };
+      };
+
+    }
+
+    (mkIf (cfg.motd != null) {
+      environment.etc."solanum/ircd.motd".text = cfg.motd;
+    })
+  ]);
+}
diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index 420e6eaf2e8..4ada4a5de80 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -384,6 +384,7 @@ in
   snapcast = handleTest ./snapcast.nix {};
   snapper = handleTest ./snapper.nix {};
   sogo = handleTest ./sogo.nix {};
+  solanum = handleTest ./solanum.nix {};
   solr = handleTest ./solr.nix {};
   sonarr = handleTest ./sonarr.nix {};
   spacecookie = handleTest ./spacecookie.nix {};
diff --git a/nixos/tests/solanum.nix b/nixos/tests/solanum.nix
new file mode 100644
index 00000000000..aabfb906aa8
--- /dev/null
+++ b/nixos/tests/solanum.nix
@@ -0,0 +1,89 @@
+let
+  clients = [
+    "ircclient1"
+    "ircclient2"
+  ];
+  server = "solanum";
+  ircPort = 6667;
+  channel = "nixos-cat";
+  iiDir = "/tmp/irc";
+in
+
+import ./make-test-python.nix ({ pkgs, lib, ... }: {
+  name = "solanum";
+  nodes = {
+    "${server}" = {
+      networking.firewall.allowedTCPPorts = [ ircPort ];
+      services.solanum = {
+        enable = true;
+      };
+    };
+  } // lib.listToAttrs (builtins.map (client: lib.nameValuePair client {
+    imports = [
+      ./common/user-account.nix
+    ];
+
+    systemd.services.ii = {
+      requires = [ "network.target" ];
+      wantedBy = [ "default.target" ];
+
+      serviceConfig = {
+        Type = "simple";
+        ExecPreStartPre = "mkdir -p ${iiDir}";
+        ExecStart = ''
+          ${lib.getBin pkgs.ii}/bin/ii -n ${client} -s ${server} -i ${iiDir}
+        '';
+        User = "alice";
+      };
+    };
+  }) clients);
+
+  testScript =
+    let
+      msg = client: "Hello, my name is ${client}";
+      clientScript = client: [
+        ''
+          ${client}.wait_for_unit("network.target")
+          ${client}.systemctl("start ii")
+          ${client}.wait_for_unit("ii")
+          ${client}.wait_for_file("${iiDir}/${server}/out")
+        ''
+        # wait until first PING from server arrives before joining,
+        # so we don't try it too early
+        ''
+          ${client}.wait_until_succeeds("grep 'PING' ${iiDir}/${server}/out")
+        ''
+        # join ${channel}
+        ''
+          ${client}.succeed("echo '/j #${channel}' > ${iiDir}/${server}/in")
+          ${client}.wait_for_file("${iiDir}/${server}/#${channel}/in")
+        ''
+        # send a greeting
+        ''
+          ${client}.succeed(
+              "echo '${msg client}' > ${iiDir}/${server}/#${channel}/in"
+          )
+        ''
+        # check that all greetings arrived on all clients
+      ] ++ builtins.map (other: ''
+        ${client}.succeed(
+            "grep '${msg other}$' ${iiDir}/${server}/#${channel}/out"
+        )
+      '') clients;
+
+      # foldl', but requires a non-empty list instead of a start value
+      reduce = f: list:
+        builtins.foldl' f (builtins.head list) (builtins.tail list);
+    in ''
+      start_all()
+      ${server}.systemctl("status solanum")
+      ${server}.wait_for_open_port(${toString ircPort})
+
+      # run clientScript for all clients so that every list
+      # entry is executed by every client before advancing
+      # to the next one.
+    '' + lib.concatStrings
+      (reduce
+        (lib.zipListsWith (cs: c: cs + c))
+        (builtins.map clientScript clients));
+})