diff --git a/src/opengnsys/modules/server/ogAdmClient/__init__.py b/src/opengnsys/modules/server/ogAdmClient/__init__.py
index c9e0344..74d7716 100644
--- a/src/opengnsys/modules/server/ogAdmClient/__init__.py
+++ b/src/opengnsys/modules/server/ogAdmClient/__init__.py
@@ -316,7 +316,7 @@ class ogAdmClientWorker (ogLiveWorker):
             }
         return {
             'nfn': 'RESPUESTA_status',
-            'mac': '12:23:34:45:56:67',
+            'mac': self.mac,
             'ip': self.IPlocal,
             'cfg': cfg,
             'threads': thr_status,
diff --git a/src/opengnsys/workers/oglive_worker.py b/src/opengnsys/workers/oglive_worker.py
index d221f1b..694eb8e 100644
--- a/src/opengnsys/workers/oglive_worker.py
+++ b/src/opengnsys/workers/oglive_worker.py
@@ -200,6 +200,15 @@ class ogLiveWorker(ServerWorker):
         logger.info ('local IP is "{}"'.format (self.IPlocal))
         return True
 
+    def tomaMAClocal (self):
+        ## tomaIPlocal() calls interfaceAdm('getIpAddress')
+        ## getIpAddress runs 'ip addr show' and returns the IP address of every network interface except "lo"
+        ## (ie. breaks badly if there's more than one network interface)
+        ## let's make the same assumptions here
+        mac = subprocess.run (["ip -json link show |jq -r '.[] |select (.ifname != \"lo\") |.address'"], shell=True, capture_output=True, text=True)
+        self.mac = mac.stdout.strip()
+        return True
+
     def enviaMensajeServidor (self, path, obj={}):
         obj['iph'] = self.IPlocal          ## Ip del ordenador
         obj['ido'] = self.idordenador      ## Identificador del ordenador
@@ -272,6 +281,7 @@ class ogLiveWorker(ServerWorker):
 
         self.pathinterface   = None
         self.IPlocal         = None     ## Ip del ordenador
+        self.mac             = None     ## MAC del ordenador
         self.idordenador     = None     ## Identificador del ordenador
         self.nombreordenador = None     ## Nombre del ordenador
         self.cache           = None
@@ -294,6 +304,9 @@ class ogLiveWorker(ServerWorker):
         if not self.tomaIPlocal():
             raise Exception ('Se han generado errores. No se puede continuar la ejecución de este módulo')
 
+        if not self.tomaMAClocal():
+            raise Exception ('Se han generado errores. No se puede continuar la ejecución de este módulo')
+
         threading.Thread (name='monitoring_thread', target=self.mon, daemon=True).start()
 
     def _long_running_job (self, name, f, args):