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Use sha2 HMACs on RHEL 6 / CentOS 6. #270
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Signed-off-by: Jason McNew <foonix@yahoo.com>
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Apr 10, 2020
…m upstream, so use RHEL 6.5 HMACs. Signed-off-by: Jason McNew <foonix@yahoo.com>
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RedHad Enterprise Linux (and family) support SHA2 HMACs as of RHEL 6.5. Please see Detailed notes on the changes implemented in Red Hat Enterprise Linux 6.5 (BZ#969565).
This changes the default HMAC configuration on CentOS/RHEL >= 6.5 to the settings recommended by CIS guidelines.
This also fixes ssh connectivity issues in mixed RHEL6/RHEL7 environments, as the default OpenSSH 5.3 configuration has no overlapping HMACs with 7.4.