Ensure minimum SSH Encryption algorithm is set to aes128-cbc

ÉlevéeNiveau 1Revue manuellef5-bigip

Description

To set strong SSH Encryption algorithm.

Méthode de vérification

Méthode d'audit: Revue manuelle

Cette recommandation ne peut pas être vérifiée automatiquement. Une analyse la liste avec ces instructions lorsque vous passez --include-manual.

Run 'tmsh list sys sshd all-properties' and review the include statement: a 'Ciphers' line must restrict SSH to the organisation-approved ciphers (the CIS example starts the list with aes128-cbc, aes128-ctr, aes192-ctr, aes256-ctr). Note the CIS example also lists arcfour ciphers, which are weak; prefer CTR/GCM ciphers only.

Méthode de correction

Méthode de correction: Recommandation ou correctif d'infrastructure

1-Log in to tmsh by typing the following command:tmsh 2-To modify the sshd configuration, type the following command to start the vi editor:edit /sys sshd all-properties 3-To change the list of ciphers, you can navigate to the line that starts with the include statement, and use the keyword Ciphers : include "Ciphers aes128-cbc,aes128-ctr,aes192-ctr,aes256- ctr,arcfour128,arcfour256,arcfour"

Propriétés

Systèmes d'exploitation: Tous
Étiquettes: f5-bigipcrypto
Référence: CIS F5 Networks Benchmark v1.0.0 - 4.5 Ensure minimum SSH Encryption algorithm is set to aes128-cbc