FortiGate
FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
_mribwan
Staff
Staff
Article Id 271688
Description This article describes that the collectoragent.exe (FSSO) sends traffic to port 139 / 445 / 389 to the user IP (internal or external IP address).
Scope FSSO, FortiGate, collecteragent.exe.
Solution

Refer to the following truncated pcap where:

 

FSSO IP is 10.59.x.x (Source).

The client IP is 10.48.x.x (Destination).

 

pcap1.png

 

It can be seen that the collector agent is trying to send traffic to the client via port 139 / 445 / 389.

 

This is an expected behavior for workstation checks, and it is done whether the client has an internal or external IP address. It will check port 139 445 or 389 to see if the workstation is online.

 

Related article:

Technical Tip: Explanation of FSSO timers.