Seitenhistorie

Description:

The feature Intruder Detection System / Intruder Prevention System (IDS/IPS) recognizes and blocks potentially malicious packets. Although it is possible that normal traffic is recognized as potentially malicious and blocked.

This article describes how an exception for the feature IDS/IPS can be created.

Requirements:

• LANCOM R&S®Unified Firewall mit LCOS FX ab Version 10.3
  
• Eingerichtetes und funktionsfähiges Netzwerk samt Internetzugang auf dem LANCOM Router
• Web-Browser zur Konfiguration der Unified Firewall.
  
  Es werden folgende Browser unterstützt:
  • Google Chrome
  • Chromium
  • Mozilla Firefox

Procedure:

1) Creating an exception for the feature IDS/IPS: 

1.1) Open the configuration of the Unified Firewall in a browser and go to the menu Monitoring & Statistics → Settings.

1.2) In the dropdown-menu IDPS Alert select the option Save Raw Data Locally in order for the Unified Firewall to log packets which are recognized and blocked by IDS/IPS.

Afterwards click Save.

1.3) Go to the menu Monitoring & Statistics → Logs → Alert Log.

1.4) In the field More Filters select the parameter Category: IDPS  to limit the Alert Log to IDS/IPS messages.

1.5) Select an event you want to allow, click on the "Gear symbol" and afterwards on Ignore Rule(in this example DNS requests to the DNS server 9.9.9.9 were recognized by IDS).

1.6) Repeat step 1.5) for additional events if necessary.

1.7) The creation of the exception for the feature IDS/IPS is now complete.

2) Bearbeiten und Löschen der Ausnahme-Regel:

2.1) Go to the menu UTM → IDS/IPS.

2.2) You can find the exception created in step 1.5) under Ignore Rules. If necessary you can edit the exception or delete it via the "dustbin symbol", if the exception isn't needed anymore.