Re: FTPS problem after upgrade to V7R4

Hello Gio,

Am 23.11.2023 um 18:23 schrieb gio.cot via MIDRANGE-L <midrange-l@xxxxxxxxxxxxxxxxxx>:

Last week we migrate from V7R2 to V7R4 .. from since then FTPS go on this
error : Secure connection error, return code -1 ( Help 2° level : “No
encryption type available or specified.”)

This is a recurring topic in this list and most often translates to: "The list of valid encryptions on the local side and on the remote side has no common entries".

Possibile was due to the migration to V7R4 ?

Yes. Newer OS releases (on whatever OS we talk about) usually disable (or actually remove from the code base) weak crypto. If the other side is still on old SSL/TLS library levels, this can lead to your situation.

I suggest you contact the remote side server admin and make sure their machine offers something more current than e. g. 3DES/SHA1. Other mitigations would be your local machine to allow weaker crypto. How this is achieved, I can't tell: I'm not skilled with TLS on IBM i at all.

Probably search the list archives for learning from old posts how to further drill down this issue.

:wq! PoC