Legacy versions do not support modern encryption standards like AES128-CBC-SHA , which was introduced in version 3.14 to protect your router login credentials.
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Official versions support the latest RouterOS features and security protocols (like TLS). Bug Fixes: Legacy versions do not support modern encryption standards
: A modern, cross-platform version available for Windows, macOS, and Linux. : The current stable standard for Windows users. Version 2.2.18 Notes cross-platform version available for Windows