| Dmitry Teselkin | e9420e7 | 2018-04-03 13:49:39 +0300 | [diff] [blame] | 1 | # 5.2.15 Ensure SSH warning banner is configured (Scored) |
| 2 | # |
| 3 | # Profile Applicability |
| 4 | # --------------------- |
| 5 | # - Level 1 - Server |
| 6 | # - Level 1 - Workstation |
| 7 | # |
| 8 | # Description |
| 9 | # ----------- |
| 10 | # The Banner parameter specifies a file whose contents must be sent to the remote user |
| 11 | # before authentication is permitted. By default, no banner is displayed. |
| 12 | # |
| 13 | # Rationale |
| 14 | # --------- |
| 15 | # Banners are used to warn connecting users of the particular site's policy regarding |
| 16 | # connection. Presenting a warning message prior to the normal user login may assist the |
| 17 | # prosecution of trespassers on the computer system. |
| 18 | # |
| 19 | # Audit |
| 20 | # ----- |
| 21 | # Run the following command and verify that output matches: |
| 22 | # |
| 23 | # # grep "^Banner" /etc/ssh/sshd_config |
| 24 | # Banner /etc/issue.net |
| 25 | # |
| 26 | # Remediation |
| 27 | # ----------- |
| 28 | # Edit the /etc/ssh/sshd_config file to set the parameter as follows: |
| 29 | # |
| 30 | # Banner /etc/issue.net |
| 31 | |
| 32 | parameters: |
| 33 | openssh: |
| 34 | server: |
| 35 | banner: | |
| 36 | =================================== WARNING ==================================== |
| 37 | You have accessed a computer managed by ${_param:ssh_banner_company_name}. |
| 38 | You are required to have authorisation from ${_param:ssh_banner_company_name} |
| 39 | before you proceed and you are strictly limited to use set out within that |
| 40 | authorisation. Unauthorised access to or misuse of this system is prohibited |
| 41 | and constitutes an offence under the Computer Misuse Act 1990. |
| 42 | If you disclose any information obtained through this system without authority |
| 43 | ${_param:ssh_banner_company_name} may take legal action against you. |
| 44 | ================================================================================ |
| 45 | |