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.
Description By default, the MTU of an IPsec VPN Interface is dynamically calculated. Prior to v6.4.0, user will not be able to manually override. From v6.4.0, user can override the MTU of an IPSec VPN Interface.
This article describes how to override the MTU of an IPSec VPN Interface from CLI.
Solution From CLI.
# config system interface edit ipsec-tunnel-1 set mtu-override enable/disable set mtu 1400 end end
