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.
yangw
Staff
Staff
Article Id 190205

Description
This article describes how to set up L2 forwarding of the IPsec tunnel interface to allow connection between two IPsec dial up client host which belongs to the same subnet.

Related link:

https://help.fortinet.com/fos50hlp/54/Content/FortiOS/fortigate-networking-54/Interfaces/VLANs/Layer...

Solution
By default, FortiGate does not pass layer-2 traffic.
If there are layer-2 protocols, configure FortiGate interfaces to pass these protocols without blocking.

Configure it via CLI:

# config system interface
    edit <<IPsec VPN interface name>>
        set arpforward enable
        set broadcast-forward enable
        set netbios-forward enable
    end

The connection between the two clients confirmed that the ICMP is passing through.

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