Joshua Anders

Core Consulting Services

Building on years of real-world experience, my core consulting services leverage deep technical expertise to deliver high availability, security, and performance for your IT infrastructure:

• Extensive system/server administration, including critical infrastructure for Fortune 500 companies and start-ups.
• Seamless server migrations and upgrades, minimizing downtime and ensuring continuity.
• Provisioning of Xen-based virtualized servers for efficient, scalable infrastructure solutions.
• Comprehensive firewall configuration and security hardening to thwart advanced threats.
• Advanced configuration, programming, and tuning of Asterisk-based VoIP systems for optimal performance.
• Extensive LDAP integration services, showcasing successful deployments across diverse environments, enhancing security and operational efficiency.
• Expert configuration and management of email servers leveraging Postfix, Dovecot, and advanced filtering with Sieve/Amavis/SpamAssassin to ensure robust, secure, and efficient email delivery.
• Proven track record of maintaining pristine IP reputation across major and minor email providers, underpinned by meticulous SPF, DKIM, and DMARC record management.

Debian System Expertise

My experience with Debian-based systems is not just theoretical but rooted in numerous successful deployments:

• Custom Debian system configuration and optimization for high-performance computing environments.
• Rigorous security updates and patch management protocols, proven to secure systems effectively.
• Performance tuning and resource optimization, demonstrated through enhanced system reliability and efficiency.

Asterisk Telephony Expertise

My Asterisk telephony solutions are backed by a track record of successful implementations in:

• Design and management of Asterisk servers for VoIP services, supporting thousands of concurrent calls.
• Complex dialplan development for customized call routing, addressing unique business needs.
• API integration of Asterisk systems for extended functionality, including custom SMPP gateways for SMS handling.
• Secure VoIP protocol implementation and encryption to protect communications against interception and fraud.

LDAP Integration Expertise

My LDAP integration expertise is demonstrated through a variety of successful projects:

• Streamlined mail server operations by integrating Postfix and Dovecot with LDAP, simplifying user management.
• Enhanced corporate VPN security with LDAP-integrated access controls for OpenVPN, improving both security and user experience.
• Secured server access by implementing PAM/SSH authentication, utilizing LDAP for centralized key management.
• Unified login experiences across web applications by customizing LDAP integration, including for platforms like GitLab and various wikis.
• Leveraged SAML for LDAP-backed authentication in third-party systems, enabling seamless single sign-on (SSO) capabilities.

Email Server Configuration and Deliverability Expertise

My deep dive into email server configuration and email deliverability ensures that your communication systems are not just operational but optimized for peak performance:

• Founded a hosting company providing comprehensive email services, from server setup with Postfix and Dovecot to advanced filtering mechanisms via Sieve/Amavis/SpamAssassin, ensuring clean, spam-free inboxes.
• Comprehensive management of email authentication techniques including SPF, DKIM, and DMARC records, essential for building and maintaining a strong IP reputation and ensuring high deliverability rates.
• Consulting services to enterprise clients, focusing on the management of their email infrastructure, troubleshooting deliverability issues, and guidance on best practices to achieve optimal email system performance.
• Custom email routing and deliverability strategies tailored to specific business needs, ensuring high availability and compliance with evolving email standards and security protocols.