I am not completely sure, but you may want to look at the protocol setting in
# Protocol 2,1
Change Protocol 1 to Protocol 2 and restart. This should already be set to
Protocol 2 in Centos 6.5, but you may want to double check.
I found this run down of the different protocol options
Not sure if that is going to be enough to solve your particular issue though.
Do you know what they are using to check the configuration?
This is from running
man sshd_config on
Specifies the ciphers allowed for protocol version 2 in order of preference. Multiple ciphers must be comma-separated. The supported ciphers are
“3des-cbc”, “aes128-cbc”, “aes192-cbc”, “aes256-cbc”, “aes128-ctr”, “aes192-ctr”, “aes256-ctr”, “arcfour128”, “arcfour256”, “arcfour”,
“blowfish-cbc”, and “cast128-cbc”. The default is:
MACs Specifies the MAC (message authentication code) algorithms in order of preference. The MAC algorithm is used in protocol version 2 for data
integrity protection. Multiple algorithms must be comma-separated. The default is:
So I would take a look through those and set the options in your
/etc/ssh/sshd_config file with the ciphers and macs that you want.