We use a FortiGate 601E with v6.4.9.
Since the last firmware upgrade, FTP transfers with EPSV have been failing. Locally, the FTP server responds with "|||PORT|." However, the FortiGate translates this to "|||PORT" (the final "|" is missing).
Transfers with PASV continue to work.
I can't disable the session helper because it's required for PASV.
The first step before everything is to bring that firmware into the real world (at least 7.2.12, and recommended 7.4.8) and start troubleshooting from there. The issue may have been fixed already.
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