Blocking Foreign IP Access with Nginx Using the ngx_http_geoip2 Module

This tutorial explains how to install the ngx_http_geoip2 module, upgrade Nginx to version 1.18, configure GeoIP2 databases, and modify the Nginx configuration to automatically reject requests from foreign IP addresses, complete with command‑line examples and verification steps.

IP blockingOperationsgeoip2

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Blocking Foreign IP Access with Nginx Using the ngx_http_geoip2 Module

Practical DevOps Architecture

Feb 22, 2021 · Operations

Resolving Tomcat Log File Permission Issues by Adjusting UMASK

This article explains why Tomcat log files inherit restrictive permissions after deployment, describes Linux UMASK behavior, and provides step‑by‑step instructions to modify the catalina.sh script so that log files use the system's default 644/640 permissions.

Linux permissionsLog FilesOperations

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Resolving Tomcat Log File Permission Issues by Adjusting UMASK

MaGe Linux Operations

Aug 11, 2014 · Operations

Nginx Rewrite vs. Location: The Hidden URL Normalization Trap

This article explains how Nginx normalizes incoming URLs for location matching but not for rewrite targets, causing unexpected mismatches when extra slashes appear, and shows how to avoid the pitfall with proper configuration.

locationrewriteserver-configuration

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Nginx Rewrite vs. Location: The Hidden URL Normalization Trap