SELinux can be such a nuisance. In particular, if you have a newly created file system, you will need to add labels to it, also known as SELinux security contexts.
Log4j RCE and mitigation techniques
For quite some time it seemed as if cyber vulnerabilities in the Java ecosystem would be losing ground. Instead, it was the calm before the storm: a vulnerability in the Log4j library threatens web servers and other applications in a variety of ways.
Fixing your Web Server’s Security Headers: From Hall of Shame to Hall of Fame
[Updated 2020-12-04] This post explains how to set up robust security headers in NGINX to protect your web application from malicious payloads and other forms of attacks. Choose your HTTP(S) headers wisely.
Cannot sign in to AWS as IAM user with MFA? How to resync your MFA token generator
Problems signing in to AWS? When the login page “Sign in as IAM user” repeatedly says: “Your authentication information is incorrect. Please try again” though you entered correct information, your Gemalto token generator for MFA authentication could be out of sync.
Letsencrypt tips and tricks
Who wants to issue certificates manually if they can take Letsencrypt’s Certbot to the task.
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