LINUX & APACHE
Stability, security, and speed on the server side. Administration and security hardening of headless Linux servers, as well as performance tuning of high-traffic Apache web servers. Robust, secure, and optimized server-side infrastructure management.
I
Application Installation
Professional installation and configuration of Linux-based software and servers.
Service: Professional installation of Linux-based (Debian, Ubuntu, OpenSUSE) servers and web application infrastructures.
Technical content: Resolving operating system-level dependencies, secure repository management, and installation and configuration of custom software packages according to specific requirements.
II
Application Updates
Continuous and secure maintenance of the operating system and software components to keep them up to date.
Service: Scheduled updating of the operating system and all installed software components to minimize vulnerabilities.
Technical content: Application of security patches and kernel updates, as well as proactive detection and management of configuration incompatibilities arising from software version changes.
III
System Module Management
Installation, version management, and configuration of Linux, Apache, PHP, and Python modules.
Service: Precise management and version control of supplementary modules for the Linux kernel, Apache web server, and runtime environments (PHP, Python).
Technical content: Selective activation of Dynamic Shared Object (DSO) based web server modules (e.g. mod_rewrite, mod_headers, mod_proxy), as well as version-controlled maintenance and optimization of PHP extensions.
IV
Apache Performance Tuning
PHP-FPM and MPM optimization, performance tuning, memory limit configuration, and thread/process handling calibration.
Service: Fine-tuning the Apache web server configuration to match the available hardware resources and achieve maximum throughput.
Technical content: Calibration of Apache MPM (Event/Worker) process handlers and PHP-FPM (FastCGI Process Manager) pools. Calculation and fine-tuning of MPM values based on physical RAM limitations to prevent Out-Of-Memory (OOM) shutdowns.
V
Web Server Security (Server Hardening)
SSL/TLS certificate management and security configuration.
Service: Strengthening web server and network communication against malicious attacks, unauthorized access, and data leakage.
Technical content: Hardening SSL/TLS protocols and encryption algorithms (Cipher Suites), with preference for TLS 1.3 and disabling outdated versions. Implementation of security HTTP headers (HSTS, Content Security Policy, X-Frame-Options). Hiding web server signatures and version information (ServerTokens Prod).
VI
Domain & VirtualHost Management
Complex Rewrite rules and Proxy/Reverse Proxy configurations, frontend/backend systems, and load distribution across multiple servers.
Service: Stable operation of complex web address structures, redirects, and multi-layer frontend/backend architectures.
Technical content: Development of complex Apache Rewrite rules. Configuration of Proxy and Reverse Proxy gateways, deployment of TLS/SSL certificates on frontend servers, and continuous load distribution between backend application servers.
VII
Remote Server Management
Secure and continuous remote management of complex infrastructures with up to 10+ servers (SSH/VPN).
Service: Continuous, secure, and encrypted remote supervision, administration, and monitoring of complex server environments with up to 10+ servers.
Technical content: Implementation of secure remote access channels (SSH key-based authentication, non-standard ports, Fail2ban protection, private VPN networks), security backups, server management, and monitoring.
VIII
Virtual Machine Management
Administration of VMware environments, snapshot management, and hardware redundancy configuration.
Service: Administration, resource allocation, and maintenance of virtualized server environments (VMware).
Technical content: Dynamic scaling of virtual hardware components (CPU, RAM, vDisk expansion with file system-level resizing using hot-plug functionality). Management of snapshots and backup disk images, as well as configuration of hardware redundancy and cloud-based migrations.
ADDITIONAL AREAS OF EXPERTISE
Comprehensive Moodle LMS support, including installation, version upgrades, troubleshooting, operation, and custom source-code-level development for large-scale university or enterprise infrastructures.
Development of custom system-level scripts (Bash, Perl, Python) and modern OOP PHP applications, with automation designed to eliminate manual tasks and accelerate problem-solving.
