Product manual

GFI LanGuard 2 Installing GFI LanGuard | 26
3. From the right pane, click Agents Settings.
4. From the Agents Settings dialog, specify the communication port in the TCP port text box.
5. Click OK.
GFI LanGuard Agent and Agent-less computers
GFI LanGuard communicates with managed computers (Agents and Agent-less), using the ports and
protocols below. The firewall on managed computers needs to be configured to allow Inbound
requests on ports:
TCP Ports Protocol Description
22 SSH Auditing Linux systems.
135 DCOM Dynamically assigned port.
137 NetBIOS Computer discovery and resource sharing.
138 NetBIOS Computer discovery and resource sharing.
139 NetBIOS Computer discovery and resource sharing.
161 SNMP Computer discovery.
445 SMB Used while:
Auditing computers
Agent management
Patch deployment.
Table 8: Ports and Protocols
2.2.4 Gateway permissions
To download definition and security updates, GFI LanGuard connects to GFI, Microsoft and Third-
Party update servers via HTTP. Ensure that the firewall settings of the machine where GFI LanGuard
is installed, allows connections to:
*software.gfi.com/lnsupdate/
*.download.microsoft.com
*.windowsupdate.com
*.update.microsoft.com
All update servers of Third-Party Vendors supported by GFI LanGuard.