Technical Tip: FortiADC disconnected from FortiAnalyzer

There can be a scenario where, after upgrading FortiADC, it is unable to connect to FortiAnalyzer.

To verify further, take debugs:

diagnose debug module miglogd oftp_detail set

diagnose debug enable

If the logs show something similar to this:

date=2026-03-09 time=13:19:44 device_id=FADVMS***** log_id=0005002005 type=event subtype=slb pri=notice vd=hosted msg_id=220828219 policy="web****" group="none" member="none" attrtype="none" attrname="none" action="ssl" status="failure" logdesc="SLB SSL Handshake" msg="Client 10.10.10.1 failed to establish SSL connection with VS web***** of ip 10.10.20.2 : error:0A0000EA:SSL routines::callback failed

(__ssl_load_cert : 384) Failed in ctx get cert
(__ssl_cert_ctx_free : 237) Done
(__ssl_ctx_create_new : 558) Failed in loading cert(s)
(ssl_ctx_free : 262) Done

Then, proceed to the CLI of FortiADC, log in with the admin account, and run the command below to check if the certs are there:

fn ls /etc/snca

If this shows empty output, then this is the only reason for this connectivity failure.

Expected output:

fn ls /etc/snca
snca1.cer snca1.key snca2.cer snca2.key

If certs are there and still the SSL connection is failing, then continue troubleshooting using the below article:
Troubleshooting Tip: How to troubleshoot connectivity between FortiAnalyzer and FortiADC