Handle network without upnp

urlchecker_http.py

@@ -125,7 +125,10 @@ class WebBot:
         u.discoverdelay = 200
         u.discover()
         u.selectigd()
+        try:
           print("external ip: {}".format(u.externalipaddress()))
+        except Exception:
+          pass
 
         try:
             self.check(url)