Technical Tip: The IPSec tunnel shows strange char...

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.

Article Id 304816

Description

This article describes the behavior when the IPSec tunnel (IKEv2) shows some strange characters as User in VPN events log.

Scope

FortiGate, VPN, IKEv2.

Solution

When using IKEv2 in the VPN IPSec tunnel, it is possible to see strange characters as Users in the VPN events log.

For example:

The user '*`8C' is the ASCII encoded character of the remote peer's IP address (42.96.56.67). It can be verified by using this tool http://www.unit-conversion.info/texttools/ascii/

The solution is to upgrade the firmware to at least v7.0.13, v7.2.5 or v7.4.0.

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Technical Tip: The IPSec tunnel shows strange characters as User in VPN events log