diff --git a/nixos/modules/services/logging/ulogd.nix b/nixos/modules/services/logging/ulogd.nix
index 065032b531c6..05c9797bb28b 100644
--- a/nixos/modules/services/logging/ulogd.nix
+++ b/nixos/modules/services/logging/ulogd.nix
@@ -3,7 +3,7 @@
 with lib;
 let
   cfg = config.services.ulogd;
-  settingsFormat = pkgs.formats.ini { };
+  settingsFormat = pkgs.formats.ini { listsAsDuplicateKeys = true; };
   settingsFile = settingsFormat.generate "ulogd.conf" cfg.settings;
 in {
   options = {
@@ -12,22 +12,34 @@ in {
 
       settings = mkOption {
         example = {
-          global.stack = "stack=log1:NFLOG,base1:BASE,pcap1:PCAP";
+          global.stack = [
+            "log1:NFLOG,base1:BASE,ifi1:IFINDEX,ip2str1:IP2STR,print1:PRINTPKT,emu1:LOGEMU"
+            "log1:NFLOG,base1:BASE,pcap1:PCAP"
+          ];
+
           log1.group = 2;
+
           pcap1 = {
-            file = "/var/log/ulogd.pcap";
             sync = 1;
+            file = "/var/log/ulogd.pcap";
+          };
+
+          emu1 = {
+            sync = 1;
+            file = "/var/log/ulogd_pkts.log";
           };
         };
         type = settingsFormat.type;
         default = { };
-        description = lib.mdDoc "Configuration for ulogd. See {file}`/share/doc/ulogd/` in `pkgs.ulogd.doc`.";
+        description = lib.mdDoc
+          "Configuration for ulogd. See {file}`/share/doc/ulogd/` in `pkgs.ulogd.doc`.";
       };
 
       logLevel = mkOption {
         type = types.enum [ 1 3 5 7 8 ];
         default = 5;
-        description = lib.mdDoc "Log level (1 = debug, 3 = info, 5 = notice, 7 = error, 8 = fatal)";
+        description = lib.mdDoc
+          "Log level (1 = debug, 3 = info, 5 = notice, 7 = error, 8 = fatal)";
       };
     };
   };
@@ -40,7 +52,10 @@ in {
       before = [ "network-pre.target" ];
 
       serviceConfig = {
-        ExecStart = "${pkgs.ulogd}/bin/ulogd -c ${settingsFile} --verbose --loglevel ${toString cfg.logLevel}";
+        ExecStart =
+          "${pkgs.ulogd}/bin/ulogd -c ${settingsFile} --verbose --loglevel ${
+            toString cfg.logLevel
+          }";
         ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
       };
     };
diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index 5b2e12a501bf..92389fdad55a 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -839,7 +839,7 @@ in {
   typesense = handleTest ./typesense.nix {};
   ucarp = handleTest ./ucarp.nix {};
   udisks2 = handleTest ./udisks2.nix {};
-  ulogd = handleTest ./ulogd.nix {};
+  ulogd = handleTest ./ulogd/ulogd.nix {};
   unbound = handleTest ./unbound.nix {};
   unifi = handleTest ./unifi.nix {};
   unit-php = handleTest ./web-servers/unit-php.nix {};
diff --git a/nixos/tests/ulogd.nix b/nixos/tests/ulogd.nix
deleted file mode 100644
index d351fdae7983..000000000000
--- a/nixos/tests/ulogd.nix
+++ /dev/null
@@ -1,82 +0,0 @@
-import ./make-test-python.nix ({ pkgs, lib, ... }: {
-  name = "ulogd";
-
-  meta.maintainers = with lib.maintainers; [ p-h ];
-
-  nodes.machine = { ... }: {
-    networking.firewall.enable = false;
-    networking.nftables.enable = true;
-    networking.nftables.ruleset = ''
-      table inet filter {
-        chain input {
-          type filter hook input priority 0;
-          log group 2 accept
-        }
-
-        chain output {
-          type filter hook output priority 0; policy accept;
-          log group 2 accept
-        }
-
-        chain forward {
-          type filter hook forward priority 0; policy drop;
-          log group 2 accept
-        }
-
-      }
-    '';
-    services.ulogd = {
-      enable = true;
-      settings = {
-        global = {
-          logfile = "/var/log/ulogd.log";
-          stack = "log1:NFLOG,base1:BASE,pcap1:PCAP";
-        };
-
-        log1.group = 2;
-
-        pcap1 = {
-          file = "/var/log/ulogd.pcap";
-          sync = 1;
-        };
-      };
-    };
-
-    environment.systemPackages = with pkgs; [
-      tcpdump
-    ];
-  };
-
-  testScript = ''
-    start_all()
-    machine.wait_for_unit("ulogd.service")
-    machine.wait_for_unit("network-online.target")
-
-    with subtest("Ulogd is running"):
-        machine.succeed("pgrep ulogd >&2")
-
-    # All packets show up twice in the logs
-    with subtest("Logs are collected"):
-        machine.succeed("ping -f 127.0.0.1 -c 5 >&2")
-        machine.succeed("sleep 2")
-        machine.wait_until_succeeds("du /var/log/ulogd.pcap >&2")
-        _, echo_request_packets = machine.execute("tcpdump -r /var/log/ulogd.pcap icmp[0] == 8 and host 127.0.0.1")
-        expected, actual = 5*2, len(echo_request_packets.splitlines())
-        assert expected == actual, f"Expected {expected} packets, got: {actual}"
-        _, echo_reply_packets = machine.execute("tcpdump -r /var/log/ulogd.pcap icmp[0] == 0 and host 127.0.0.1")
-        expected, actual = 5*2, len(echo_reply_packets.splitlines())
-        assert expected == actual, f"Expected {expected} packets, got: {actual}"
-
-    with subtest("Reloading service reopens log file"):
-        machine.succeed("mv /var/log/ulogd.pcap /var/log/old_ulogd.pcap")
-        machine.succeed("systemctl reload ulogd.service")
-        machine.succeed("ping -f 127.0.0.1 -c 5 >&2")
-        machine.succeed("sleep 2")
-        _, echo_request_packets = machine.execute("tcpdump -r /var/log/ulogd.pcap icmp[0] == 8 and host 127.0.0.1")
-        expected, actual = 5*2, len(echo_request_packets.splitlines())
-        assert expected == actual, f"Expected {expected} packets, got: {actual}"
-        _, echo_reply_packets = machine.execute("tcpdump -r /var/log/ulogd.pcap icmp[0] == 0 and host 127.0.0.1")
-        expected, actual = 5*2, len(echo_reply_packets.splitlines())
-        assert expected == actual, f"Expected {expected} packets, got: {actual}"
-  '';
-})
diff --git a/nixos/tests/ulogd/ulogd.nix b/nixos/tests/ulogd/ulogd.nix
new file mode 100644
index 000000000000..0fa92229a100
--- /dev/null
+++ b/nixos/tests/ulogd/ulogd.nix
@@ -0,0 +1,56 @@
+import ../make-test-python.nix ({ pkgs, lib, ... }: {
+  name = "ulogd";
+
+  meta.maintainers = with lib.maintainers; [ p-h ];
+
+  nodes.machine = { ... }: {
+    networking.firewall.enable = false;
+    networking.nftables.enable = true;
+    networking.nftables.ruleset = ''
+      table inet filter {
+        chain input {
+          type filter hook input priority 0;
+          icmp type { echo-request, echo-reply } log group 2 accept
+        }
+
+        chain output {
+          type filter hook output priority 0; policy accept;
+          icmp type { echo-request, echo-reply } log group 2 accept
+        }
+
+        chain forward {
+          type filter hook forward priority 0; policy drop;
+        }
+
+      }
+    '';
+    services.ulogd = {
+      enable = true;
+      settings = {
+        global = {
+          logfile = "/var/log/ulogd.log";
+          stack = [
+            "log1:NFLOG,base1:BASE,ifi1:IFINDEX,ip2str1:IP2STR,print1:PRINTPKT,emu1:LOGEMU"
+            "log1:NFLOG,base1:BASE,pcap1:PCAP"
+          ];
+        };
+
+        log1.group = 2;
+
+        pcap1 = {
+          sync = 1;
+          file = "/var/log/ulogd.pcap";
+        };
+
+        emu1 = {
+          sync = 1;
+          file = "/var/log/ulogd_pkts.log";
+        };
+      };
+    };
+
+    environment.systemPackages = with pkgs; [ tcpdump ];
+  };
+
+  testScript = lib.readFile ./ulogd.py;
+})
diff --git a/nixos/tests/ulogd/ulogd.py b/nixos/tests/ulogd/ulogd.py
new file mode 100644
index 000000000000..d20daa4d733a
--- /dev/null
+++ b/nixos/tests/ulogd/ulogd.py
@@ -0,0 +1,48 @@
+start_all()
+machine.wait_for_unit("ulogd.service")
+machine.wait_for_unit("network-online.target")
+
+with subtest("Ulogd is running"):
+    machine.succeed("pgrep ulogd >&2")
+
+# All packets show up twice in the logs
+with subtest("Logs are collected"):
+    machine.succeed("ping -f 127.0.0.1 -c 5 >&2")
+    machine.succeed("sleep 2")
+    machine.wait_until_succeeds("du /var/log/ulogd.pcap")
+    _, echo_request_packets = machine.execute("tcpdump -r /var/log/ulogd.pcap icmp[0] == 8 and host 127.0.0.1")
+    expected, actual = 5 * 2, len(echo_request_packets.splitlines())
+    assert expected == actual, f"Expected {expected} ICMP request packets from pcap, got: {actual}"
+    _, echo_reply_packets = machine.execute("tcpdump -r /var/log/ulogd.pcap icmp[0] == 0 and host 127.0.0.1")
+    expected, actual = 5 * 2, len(echo_reply_packets.splitlines())
+    assert expected == actual, f"Expected {expected} ICMP reply packets from pcap, got: {actual}"
+
+    machine.wait_until_succeeds("du /var/log/ulogd_pkts.log")
+    _, echo_request_packets = machine.execute("grep TYPE=8 /var/log/ulogd_pkts.log")
+    expected, actual = 5 * 2, len(echo_request_packets.splitlines())
+    assert expected == actual, f"Expected {expected} ICMP request packets from logfile, got: {actual}"
+    _, echo_reply_packets = machine.execute("grep TYPE=0 /var/log/ulogd_pkts.log")
+    expected, actual = 5 * 2, len(echo_reply_packets.splitlines())
+    assert expected == actual, f"Expected {expected} ICMP reply packets from logfile, got: {actual}"
+
+with subtest("Reloading service reopens log file"):
+    machine.succeed("mv /var/log/ulogd.pcap /var/log/old_ulogd.pcap")
+    machine.succeed("mv /var/log/ulogd_pkts.log /var/log/old_ulogd_pkts.log")
+    machine.succeed("systemctl reload ulogd.service")
+    machine.succeed("ping -f 127.0.0.1 -c 5 >&2")
+    machine.succeed("sleep 2")
+    machine.wait_until_succeeds("du /var/log/ulogd.pcap")
+    _, echo_request_packets = machine.execute("tcpdump -r /var/log/ulogd.pcap icmp[0] == 8 and host 127.0.0.1")
+    expected, actual = 5 * 2, len(echo_request_packets.splitlines())
+    assert expected == actual, f"Expected {expected} packets, got: {actual}"
+    _, echo_reply_packets = machine.execute("tcpdump -r /var/log/ulogd.pcap icmp[0] == 0 and host 127.0.0.1")
+    expected, actual = 5 * 2, len(echo_reply_packets.splitlines())
+    assert expected == actual, f"Expected {expected} packets, got: {actual}"
+
+    machine.wait_until_succeeds("du /var/log/ulogd_pkts.log")
+    _, echo_request_packets = machine.execute("grep TYPE=8 /var/log/ulogd_pkts.log")
+    expected, actual = 5 * 2, len(echo_request_packets.splitlines())
+    assert expected == actual, f"Expected {expected} ICMP request packets from logfile, got: {actual}"
+    _, echo_reply_packets = machine.execute("grep TYPE=0 /var/log/ulogd_pkts.log")
+    expected, actual = 5 * 2, len(echo_reply_packets.splitlines())
+    assert expected == actual, f"Expected {expected} ICMP reply packets from logfile, got: {actual}"