Firstly, it is essential to determine the cause of the permissions change. Some possible factors could be a misconfigured script or process running on the server, a security setting, or interaction with other components of your system.
To troubleshoot this issue, you could start by checking your system logs (/var/log/syslog or similar) and any relevant application logs for any hints about what is causing the permissions change. Additionally, you may want to review any configuration files or scripts that might be involved in managing the permissions of the /var/log directory.
Since you mentioned that SELinux is disabled and the firewall is also disabled, it is less likely that these factors are causing the problem. However, I would recommend double-checking any remaining security settings or access control policies that could potentially impact the /var/log directory.
As a temporary workaround, you mentioned using a crontab that changes the permissions of the directory to 755 every 5 minutes. While this may alleviate the issue temporarily, it is not a sustainable solution in the long run. Instead, it would be more ideal to identify and address the root cause of the permissions change.
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