The SSH daemon must be configured to only use FIPS 140-2 approved ciphers.

From Red Hat Enterprise Linux 5 Security Technical Implementation Guide

Associated with IA controls: DCNR-1

Associated with: CCI-000068

SV-37824r2_rule The SSH daemon must be configured to only use FIPS 140-2 approved ciphers.

Vulnerability discussion

DoD information systems are required to use FIPS 140-2 approved ciphers. SSHv2 ciphers meeting this requirement are 3DES and AES.

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Edit the SSH daemon configuration and remove any ciphers not starting with "3des" or "aes" and remove any ciphers ending with "cbc". If necessary, add a "Ciphers" line. Restart the SSH daemon. # /sbin/service sshd restart

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