Sep 26 2021 Port Knocking for Netfilter

This article details the implementation of port knocking using Netfilter. Port knocking can be used for SSH protection (but also for REST-based API as well).

WARNING: If you intend on using port knocking to obscure the SSH port, make sure you have an alternative access method (i.e., physical terminal …

Mar 23 2020 Current HTTP Headers

Current HTTP Header settings

Jan 05 2019 ISC DHCP and Weird Hostnames

ISC DHCP handling of weird hostnames found in Nintendo 3DS and iPods.

Nov 25 2018 CSP Compatibility

Content-Security-Protection settings in HTML header

Nov 25 2018 API security checklist

Checklist of the most important security countermeasures when designing, testing, and releasing your API.

Nov 22 2018 Web Security Advanced Topic 2018

Advanced exploits of web security in 2018

Jun 03 2008 Current HTTP Content Security Policy (CSP)

Current Content Security Policy