When connecting to Magic Castle, ssh client of version >= 10.0 produces the following warning:
** WARNING: connection is not using a post-quantum key exchange algorithm.
** This session may be vulnerable to "store now, decrypt later" attacks.
** The server may need to be upgraded. See https://openssh.com/pq.html
Post-quantum key agreement (KexAlgorithms) was introduced in OpenSSH 9. Magic Castle depends on RHEL choice of OpenSSH server version.
- RHEL 10: OpenSSH 9.9
- RHEL 9: OpenSSH 8.7
- RHEL 8: OpenSSH 8.0
Until Magic Castle supports EL10, the warning will be around.
When connecting to Magic Castle, ssh client of version >= 10.0 produces the following warning:
Post-quantum key agreement (KexAlgorithms) was introduced in OpenSSH 9. Magic Castle depends on RHEL choice of OpenSSH server version.
Until Magic Castle supports EL10, the warning will be around.