Proxy & networking
Mastering ACLs in HAProxy: the complete guide
A complete guide to HAProxy ACLs: learn how to configure smart routing, IP-based access control, geolocation, and header and User-Agent analysis to secure…
Guides & insights
A library for curious minds
Proxy & networking
Mastering ACLs in HAProxy
A complete guide to HAProxy ACLs: learn how to configure smart routing, IP-based access control, geolocation, and header and User-Agent analysis to secure…
Cloud computing
AWS networking: VPC, subnets, routing and security
Design an AWS network: VPCs and CIDR ranges, public and private subnets, route tables, Internet and NAT gateways, security groups and NACLs, endpoints, pe…
Systems & Linux
Users, groups, sudo and permissions on Linux
Manage Linux accounts (useradd, usermod, passwd, chage), groups, sudo and visudo, rwx and octal permissions, umask, SUID, SGID, sticky bit, ACLs and exten…
Observability
Real User Monitoring (RUM) and Core Web Vitals: measuring what users experience
Why observe the front end, what RUM measures, Core Web Vitals (LCP, INP, CLS) and their thresholds, and the difference between RUM and synthetic monitorin…
DevOps
Browser testing and synthetic monitoring with k6
Test a web application in a real browser with the k6 browser module, measure Core Web Vitals, and continuously monitor user journeys with synthetic tests.
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