SSH connection via HAProxy (TCP + TLS, custom OpenSSL command) broken since 2025.3.x

A fix for this issue has been implemented in version 2026.1.10.3

SSH connection via HAProxy (TCP + TLS, custom OpenSSL command) broken since 2025.3.x

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I am connecting to multiple SSH targets through HAProxy running in TCP mode with TLS termination. This setup worked perfectly up to version 2025.2.12.6 using an SSH Terminal configuration with Proxy = Custom + Local + Custom and the following command:
openssl s_client -connect haproxy.domain.tld:PORT -quiet -servername %h 2>&1
(The 2>&1 is intentionally added to suppress unnecessary SSL output.)
Since version 2025.3.6.7, this no longer works. The connection immediately fails with
IO_EOF_ReadBeyondEOF

Devolutions. ProtocolsSharp: 2026.1.8.1 OS: macos unknown option '2>&1'
Bytes sent: 24, Bytes received: 0
Packets sent:
0, Packets received: 0
Kex completed: 0problem2:

This strongly suggests that command parsing or proxy execution behavior changed between these versions.

All Comments (4)

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Hello,

Thank you for reaching out and providing detailed information about the issue.

I will investigate this further with the development team. It does seem like there may be something we need to address on our end, either by fixing it or improving our documentation.

Thank you for your patience.

Best regards,

Jacob Lafrenière

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Hello,

Thank you for your patience.

We’ve identified the issue on our end and are actively working on a resolution.
I’ll keep you informed as soon as the fix is available for testing.

Best regards,

Jacob Lafrenière

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Hello,

Thank you for being so patient!

I'm pleased to inform you that a new version of RDM (2026.1.10.3) has been released, featuring the fix for your issue.

Latest Version: Download RDM

Please let us know if this works or if you encounter any issues.

Best regards,

Maxim Robert

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Dear Robert,

Thank you, it's working correctly. 👍

Best regards,
Gábor

A fix for this issue has been implemented in version 2026.1.10.3