AlmaLinux OS 9 SSH daemon must not allow rhosts authentication.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-269269 | ALMA-09-021360 | SV-269269r1050151_rule | Medium |
| Description |
| SSH trust relationships mean a compromise on one host can allow an attacker to move trivially to other hosts. |
| STIG | Date |
| CloudLinux AlmaLinux OS 9 Security Technical Implementation Guide | 2025-05-22 |
Details
| Check Text (C-73300r1048183_chk) |
| Verify the SSH daemon does not allow rhosts authentication with the following command: $ sshd -T | grep ignorerhosts ignorerhosts yes If the "IgnoreRhosts" keyword is set to "no", this is a finding. |
| Fix Text (F-73201r1048184_fix) |
| Configure the SSH daemon to not allow rhosts authentication. Add the following line to "/etc/ssh/sshd_config", or uncomment the line and set the value to "yes": IgnoreRhosts yes Alternatively, add the setting to an include file if the line "Include /etc/ssh/sshd_config.d/*.conf" is found at the top of the "/etc/ssh/sshd_config" file: $ echo 'IgnoreRhosts yes' > /etc/ssh/sshd_config.d/40-rhosts.conf Restart the SSH daemon for the settings to take effect: $ systemctl restart sshd.service |