upgrading to a newer openssh version in centos6

[sezero]

I can no longer ssh to sourceforge from a centos6 host: fails with
"Unable to negotiate a key exchange method" error.. sf.net advised
me to upgrade to openssh 5.7 or later (centos6 has 5.3.)

Upon browsing https://archives.fedoraproject.org/pub/archive/, and
also https://src.fedoraproject.org/rpms/openssh, the closest srpm I
can see is:
https://archives.fedoraproject.org/pub/ ... 16.src.rpm

Can anyone please tell me whether there are any details / pitfalls
that I should be watchful for while upgrading?

Thanks in advance.

P.S.: Yes, I know that CentOS 6 has been EOL since the end of 2020.

[TrevorH]

What that's telling you is that it's about time you got off CentOS 6. It's been dead for 2 years now and there are already root exploits available to break into it. Put your effort into getting off it, not into bodging it.

[sezero]

Not what I asked. (Thanks anyway though, I guess..)