Bug ID 1060281: Implicit FTPS and TCP verified accept option enabled.

Last Modified: Apr 28, 2025

Affected Product(s):
BIG-IP LTM(all modules)

Opened: Nov 08, 2021

Severity: 3-Major

Symptoms

An implicit FTPS client can't connect to the FTPS server using TLS.

Impact

FTP client can't use implicit FTPS if Verified Accept is enabled.

Conditions

-- FTP client uses implicit FTPS. -- The BIG-IP has an FTP Virtual Server with TCP verified accept option enabled.

Workaround

1. Do not use implicit FTPS variation of FTP protocol. It is obsolete option. The regular FTPS is working well. 2. Remove Verified Accept (VA). the implicit FTP is working well without VA.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips