I am new to Linux, I need help from the experts in enabling / hardening the ciphers so i can reproduce an issue.
What i want to do ?
When i use a older version of PuTTy and try to open a console via Putty for a red hat server via ssh, I need to see the below error:
Couldn't agree a key exchange algorithm (available: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256)
How do i enable / add new ciphers to my RedHat 7.1 machine so when i use a older version of puTTy i should see the above error.
I am trying to re-produce an issue and i want to see how to enable and disable the above error when i use a older version of PuTTy.