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+++ This bug was initially created as a clone of Bug #1840772 +++
Description of problem:
In the man pages for ssh_config and sshd_config, for the parameters:
KexAlgorithms
MACs
are only reported the default values, but not all the supported one, like what has been done in RHEL7.
On RHEL6, openssh lack the -Q feature that allow to list the supported features, so an up to date man page is very important for customer trying to do hardening of their ssh setup.
Version-Release number of selected component (if applicable):
openssh-server-5.3p1-124.el6_10.x86_64
openssh-clients-5.3p1-124.el6_10.x86_64
How reproducible:
Always
Steps to Reproduce:
1. man ssh_config (or) man sshd_config
Actual results:
1. no info about all the supported KEX and MAC
Expected results:
Finding the complete list of the supported KEX and MAC on RHEL6.
--- Additional comment from Andrea Perotti on 2020-05-27 16:48:41 UTC ---
As confirmed by the Maintainer, rhel6 openssh support the following:
kexAlgorithms:
diffie-hellman-group1-sha1
diffie-hellman-group14-sha1
diffie-hellman-group-exchange-sha1
diffie-hellman-group-exchange-sha256
ecdh-sha2-nistp256
ecdh-sha2-nistp384
ecdh-sha2-nistp521
MACs:
hmac-sha1
hmac-sha1-96
hmac-sha2-256
hmac-sha2-512
hmac-md5
hmac-md5-96
hmac-ripemd160
hmac-ripemd160
umac-64
--- Additional comment from Jakub Jelen on 2020-05-28 07:26:33 UTC ---
The proposed changes to man pages look good to me. But it is very unlikely we would be doing the openssh errata for this in RHEL 6 so if there is a chance to get it fixed through manual page override, it would be preferable (though not sure what the process is here).