Tag Archives: security

Comparison of different ways to connect to EC2 instance

Posted on February 3, 2026 by Siddharth Jain

i am confused with so many access methods provided by aws – native ssh, ec2 instance connect, session manager and now serial console – that’s 4. why doesn’t it provide 1 recommended and best method to connect to ec2 instances? … Continue reading →

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letsencrypt/certbot tips

Posted on January 29, 2025 by Siddharth Jain

Letsencrypt uses certbot for certificate management. If your certificate is not auto renewing follow the runbook below: we see that certbot is scheduled to auto-renew I see there are failures when certbot attempted to renew the certificate in the past: … Continue reading →

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Notes on systemd

Posted on January 9, 2025 by Siddharth Jain

courtesy of chatgpt Best practices on creating user account

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Verifying binaries downloaded from the internet

Posted on July 18, 2022 by Siddharth Jain

Frequently we download binaries from the internet. How do we know they are genuine and not been tampered with? (Genuine as in genuine auto parts). This post illustrates the process using the JMeter library as example and downloading to MacOS. … Continue reading →

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