> It might indicate that the server doesn't provide tls.
Unsure what you mean.

> Btw, did you generate all the certificates with the same openssl binary ?
Yes, same openssl bin on the same server.
Files can be read by the process. 444 except the key which is 400 and rsyslog runs as root on the client.

It's running rsyslog 8.3.9 and OpenSSL 1.0.2k-fips

# rsyslogd -v
rsyslogd 8.39.0, compiled with:
PLATFORM: x86_64-redhat-linux-gnu
PLATFORM (lsb_release -d):
GSSAPI Kerberos 5 support: Yes
FEATURE_DEBUG (debug build, slow code): No
32bit Atomic operations supported: Yes
64bit Atomic operations supported: Yes
memory allocator: system default
Runtime Instrumentation (slow code): No
uuid support: Yes
systemd support: Yes
Number of Bits in RainerScript integers: 64
This message and any attachments (the "message") is
intended solely for the intended addressees and is confidential.
If you receive this message in error,or are not the intended recipient(s),
please delete it and any copies from your systems and immediately notify
the sender. Any unauthorized view, use that does not comply with its purpose,
dissemination or disclosure, either whole or partial, is prohibited. Since the internet
cannot guarantee the integrity of this message which may not be reliable, BNP PARIBAS
(and its subsidiaries) shall not be liable for the message if modified, changed or falsified.
Do not print this message unless it is necessary, consider the environment.


Ce message et toutes les pieces jointes (ci-apres le "message")
sont etablis a l'intention exclusive de ses destinataires et sont confidentiels.
Si vous recevez ce message par erreur ou s'il ne vous est pas destine,
merci de le detruire ainsi que toute copie de votre systeme et d'en avertir
immediatement l'expediteur. Toute lecture non autorisee, toute utilisation de
ce message qui n'est pas conforme a sa destination, toute diffusion ou toute
publication, totale ou partielle, est interdite. L'Internet ne permettant pas d'assurer
l'integrite de ce message electronique susceptible d'alteration, BNP Paribas
(et ses filiales) decline(nt) toute responsabilite au titre de ce message dans l'hypothese
ou il aurait ete modifie, deforme ou falsifie.
N'imprimez ce message que si necessaire, pensez a l'environnement.
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