You can use IPsec with LAN (Local Area Network). You cannot use IPsec with WAN (Wide Area Network).
You cannot use IPsec with Pro-face Connect or other VPN connections at the same time.
You cannot use IPsec for device/PLC connections.
You cannot use IPsec with the E-mail feature.
Performance may be affected when using IPsec.
When IPsec specifications are changed in an operation system update, you may not be able to use IPsec anymore.