Practical guides by the SentinelHub team to help security teams reduce their external attack surface: Apache and Nginx hardening, secure remote access, jump servers, TLS/mTLS certificates, SPF/DKIM/DMARC, WAF, CDN and EASM tool comparisons. Apache Hardening: Complete Guide. Every default Apache setting you ignore is a door left ajar.
Practical guides by the SentinelHub team to help security teams reduce their external attack surface: Apache and Nginx hardening, secure remote access, jump servers, TLS/mTLS certificates, SPF/DKIM/DMARC, WAF, CDN and EASM tool comparisons. Apache Hardening: Complete Guide. Every default Apache setting you ignore is a door left ajar. This guide shows what each one means — and how to close it. Nginx Hardening: Complete Guide. Every default Nginx setting you ignore is a door left ajar. This guide shows what each one means — and how to close it. Secure Remote Access: SSH, RDP and VPN. Why leaving port 3389 open on the internet is the digital equivalent of leaving your house key under the doormat — and what to do instead. Jump Server: Security Guide. How a dedicated server can organize your support or become the next ransomware entry point. TLS & mTLS Certificates: The Definitive Guide. Everything that can go wrong with TLS certificates — and why mTLS is becoming the standard for serious stuff in 2026. SPF, DKIM & DMARC: Why Your Email Goes to Spam. The three protocols that separate your legitimate email from the spam folder — and your brand from being used by scammers. WAF & CDN: The Guide to Amplify Your Security. Honest guide to WAF and CDN — why many companies use them wrong, overspend, or stay unprotected. Attack Surface Management Tools: A Market Comparison. Honest EASM comparison: approaches, pricing, limitations, and why continuous agentless monitoring separates a serious platform from a pretty spreadsheet.