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SSH Protocol version 1 is no longer available

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Jakub Jelen 2020-07-14 09:35:18 +02:00 • committed by pbokoc
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modules/system-administrators-guide/pages/infrastructure-services/OpenSSH.adoc
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@ -53,15 +53,7 @@ It supports Kerberos authentication:: OpenSSH servers and clients can be config
[[s2-ssh-versions]]
=== Protocol Versions
indexterm:[SSH protocol,version 1]indexterm:[SSH protocol,version 2]
Two varieties of SSH currently exist: version 1 and version 2. The OpenSSH suite under {MAJOROS} uses SSH version 2, which has an enhanced key exchange algorithm not vulnerable to the known exploit in version 1. However, for compatibility reasons, the OpenSSH suite does support version 1 connections as well, although version 1 is disabled by default and needs to be enabled in the configuration files.
.Avoid using SSH version 1
[IMPORTANT]
====
To ensure maximum security for your connection, it is recommended that only SSH version 2-compatible servers and clients are used whenever possible.
====
Two varieties of SSH currently exist: version 1 and version 2. The OpenSSH suite under {MAJOROS} uses SSH version 2, which has an enhanced key exchange algorithm not vulnerable to the known exploit in version 1. Protocol version 1 was removed from OpenSSH suite and is no longer supported.
[[s2-ssh-conn]]
=== Event Sequence of an SSH Connection