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Test Connetion fails: Connect ENetSock #27

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mtaipe asked this question in Q&A
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I have a certificate and other apps that uses ldaps does not have problems connecting to this server, however the Test Connection in the OpenRSAT shows:

Ldap connect failed: "Connect ENetSock: TCrtSocket.DoTlsAfter: TLS failed [EOpenSslNetTls TOpenSslNetTls.AfterConnection connect: OpenSSL 30500010 error 1 [SSL_ERROR_SSL (error:0A000126:SSL routines::unexpected eof while reading) ldap.exa_redacted_mple.com]]"

Also, in the server, while attempting test, there is traffic in port 636.

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Replies: 3 comments

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Hello,
I need a bit more context to understand your issue. Can you provide some informations about your OS (name, version) and about your openssl version (client, server). Also, what kind of active directory are you using ?

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Both of these clients get the same error:
MacOS 26.2 (25C56)
Microsoft Windows [Version 10.0.19045.6466], had to install Win64OpenSSL_Light-3_6_1

This is a legacy server where I am trying to connect:
CentOS release 6.10
Samba 4.10.5
OpenSSL 1.0.1e-fips

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It seams to be an issue concerning the TLS version. OpenRSAT only support TLS 1.3, and most application fallback to TLS 1.2 if TLS 1.3 is not supported. I'll look for a quick fix to allow fallback to TLS 1.2.
However, I recommand you to upgrade your OS as Centos 6 is EOL since 2020 and your samba server as samba 4.10 is also EOL since 2020.

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