FortiGate and Solarwinds Max Backup Errors

[roccocetta]

Recently, several servers behind a firewall policy with default web filtering, default AV filtering, SSL Certificate Inspection and HTTP started failing their backups to a cloud provider.  The cloud provider responded blaming the FortiGate because it was replacing their certificate with the Fortinet certificate.  My understanding is that this is common behaviour for the FortiGate, and furthermore, why did the other servers behind the same firewall policy, complete successfully?  Additionally, the Fortinet certificate would be placed on all HTTPS traffic, right?  Could you some clarification here.  This is a FortiGate 200E in a Cluster Configuration.  

[Dave_Hall]

See the cookbook section on Why you should use SSL inspection, which explains this, including best practices and being selective about applying it.

[ede_pfau]

The ISP's explanation does not correspond to your remarks about the setup. Cert inspection will NOT replace any cert with a FGT internal cert. Only deep inspection will. Please check your policies/SSL profile if you really only use cert inspection.