Technical Tip: Dial-up IPsec tunnel ID for OSPF ne...

adhillon · 01-12-2026

Description This article describes the expected behavior of Azure Virtual Networks with encryption enabled, which can affect FortiGate VM DNS connectivity. Scope Any supported version of FortiGate, Microsoft Azure. Solution If encryption is enabled i...

adhillon · 11-11-2025

Description This article describes a known issue that can occur when a dial-up IPsec tunnel ID changes while using OSPF for dynamic routing. In this scenario, the tunnel ID for the VPN tunnel changes (as per diagnose vpn ike gateway list), but the tu...

adhillon · 06-17-2025

Description This article describes what and how to check in the sip debugs and session table for no or one-way audio over SIP calls. Scope FortiGate. Solution For the SIP traffic from the phone on LAN to remote phone with SNAT enabled on FortiGate ...

adhillon · 06-05-2025

Description This article describes an issue where it is not possible to configure the anti-replay check to be applied per policy for a FortiGate operating in policy-based mode. Scope NGFW Policy-based mode. Solution When FortiGate is operating in the...

adhillon · 09-16-2024

Description This article describes a known-issue where FortiGate models that have built-in LTE modems (such as the FortiGate-40F-3G4G and FortiGateRugged-60F-3G4G) are unable to successfully upgrade the LTE modem firmware when on certain FortiOS firm...

User Statistics

User Activity

Troubleshooting Tip: Enabling Azure virtual network encryption affects cleartext DNS on port 53