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Matias Gaston P.

5.0

892

7.9

100%

Villa De Merlo, Argentina

$25 USD per hour

I started with BeOS in 2002, because of a friend, who showed me something other than Windows, Always I worked repair PC & Laptops. Now I have more 10 years of experience in Server Linux. I can manager servers dedicated, servesr VPS, servers shared, etc. Setup and management you server; Apache/Nginx/Tomcat. SMTP Postfix, POP/IMAP Dovecot. FTP Vsftpd, Proftpd, Pure-ftpd-mysql. Dns Bind9, dnsmasq. File Server & printer Samba (dc-ac). Network administrator: isc-server-dhcp, openvpn, etc. Install and renew SSL certicate. All services on cloud; AWS, Azure, etc. Also website and E-mail migrations. ALL panels and web managers. Management all Linux distributions. Setup, security and optimization your server. __________________________ VERY IMPORTANT!!! “Hi I'm Matias, someone is trying to impersonate me, this account is the only one active and verified by freelancer! I DON'T USE ANY OTHER MEANS OF CONTACT, ONLY FREELANCER CHAT!” -----------------------------------------

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Iosif P.

4.9

7.4

95%

Benediktbeuern, Germany

$64 USD per hour

Senior Systems & Security Engineer with 15+ years in enterprise-grade IT. I design, harden, and operate high-availability infrastructure, and I streamline delivery with automation and clean processes. My focus: reliability, security, and clear documentation—so changes are low-risk and handovers are effortless. Strengths: Infrastructure architecture & operations (Linux/Windows, virtualization, networking) Security hardening, identity & access, monitoring/observability Automation & DevOps practices (CI/CD, config management, IaC) PowerAutomate and Microsot 365 Migrations and upgrades with minimal downtime Concise runbooks, risk-aware planning, and stakeholder-friendly communication Certifications: CompTIA Security+, Microsoft MCSE/MCSA/MCITP Languages: English (C2), German (C1), native Romanian Location: Germany • NDA-friendly • Reliable and responsive

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Arvind K.

4.3

4.4

96%

Jhunjhunu, India

$15 USD per hour

A Server Management and deployment Engineer with the experience of 10+ years in the domain of windows, linux and unix servers Services I have for you :- 1. Increasing website/server speed. 2. Investigating for hacking/phishing/spamming/spoofing activities. 3. Optimize your web-server, PHP, MySQL for heavy-load projects. 4. Cloud Deployment - AWS (EC2,SES,S3,route53 all services). 5. Azure/Google Cloud Deployment. 6. Custom Application Installation ERP NEXT, Zimbra, CWP etc 7. Install and setting CMS like WORDPRESS, JOOMLA, MAGENTO,VBULLETIN and Software installations. Expertise I have:- AWS Certified Solution Architect 1. Linux administration (CentOS, Debian\Ubuntu). 2. Server Migration and cPanel/WHM/Webmin control Panels management. 3. Security (Vulnerabilities, Malware, Server hardening). 4. MySQL (Configuration, Optimization, InnoDB restoring). 5. Mail Server: Setup, configure and troubleshooting exim, postfix mail servers. 6. Managing services like DNS, APACHE, DATABASE, SMTP, POP3, IMAP, FTP.

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Bharat J.

4.7

5.8

80%

Kolkata, India

$28 USD per hour

Bharat and his team are a dynamic and versatile group of technology professionals with a proven track record in developing cutting-edge Artificial Intelligence (AI) solutions, crafting innovative WordPress plugins, and managing Linux-based environments. Combining technical expertise with a creative approach, Bharat and his team bridge the gap between advanced machine learning applications, user-focused web development, and robust system administration. In the realm of AI, Bharat and his team excel in designing, implementing, and deploying intelligent systems to solve complex real-world problems. Their portfolio spans natural language processing, computer vision, predictive analytics, and automation, showcasing their expertise in leveraging AI to deliver impactful results. They are proficient in Python, TensorFlow, and PyTorch and have a deep understanding of data-driven methodologies and algorithm optimization. Additionally, Bharat and his team are well-versed in Linux systems, utilizing the platform to optimize server performance, enhance security, and streamline deployments. Their expertise in Linux complements their AI and web development skills, ensuring seamless integration across diverse technologies. As strong communicators and collaborative team players, Bharat and his team excel at engaging with clients to understand their needs and translating business challenges into actionable technical solutions. Their passion for innovation and commitment to excellence makes them a valuable asset to any team or organization seeking to harness the power of AI, WordPress, and Linux.

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Gajendra R.

5.0

100%

Ahmedabad, India

$20 USD per hour

Description: 👨‍💻 IT Professional with 15+ Years of Expertise in Systems Administration, Cloud, and Security I am a seasoned Windows & Linux Administrator with extensive experience in managing servers, cloud platforms, and secure IT infrastructures. Over the past 14 years, I’ve successfully delivered projects involving virtualization, security hardening, and enterprise-grade system deployments. My focus is on creating secure, optimized, and scalable environments tailored to business needs. 🌐 Systems Administration 🛠️ Skilled in Windows Server (2022/2019/2016) and Linux administration. 📂 Experienced in Active Directory, NPS, NAS, DFS file sharing, and printer management. 🔧 Strong background in Dell server hardware, storage setup, and maintenance. 🔒 Security & Authentication 🛡️ Security assessments with Nessus and Qualys. 🔑 Implementation of certificate-based authentication and Radius servers. 🔒 Designed RDP with MFA solutions to secure remote access. 🚨 Hands-on experience with DNS/DNSSEC and Cloudflare for domain security. ☁️ Cloud & Virtualization 🌩️ Proficient in AWS, Azure, Google Cloud, and Office 365 administration. 💻 Expertise in Proxmox, VirtualBox, and Hyper-V clusters. 📦 Designed and deployed multi-VM Hyper-V clusters on Hetzner and OVH cloud, including 📡 Monitoring & Optimization 📊 Proficient in IPMonitor, PRTG, and Nagios Core for proactive system monitoring. 🖥️ Implemented alerting and dashboards to maximize uptime and performance. 🤝 Collaboration & Service Desk 📋 Experienced with Jira Service Desk for IT support management. 💬 Microsoft Teams administration for seamless organizational collaboration. 🔧 Troubleshooting Expertise 🛠️ Known for resolving complex IT issues quickly and effectively. 🔍 Strong skills in diagnosing root causes of outages and performance issues. Compliance : SOC 2, ISO 27001 and other 🌟 Recent Project Highlight: Hyper-V on Hetzner & OVH Cloud I recently completed a deployment of a Hyper-V cluster hosted across Hetzner and OVH cloud platforms. The project involved: 🔐 pfSense firewall for network segmentation. 🏢 Windows Domain Controller setup with Active Directory. 🌍 Hosting web servers for client-facing apps. 📂 DFS file sharing with replication. 💾 Veeam backup and disaster recovery plan. 🔑 RDP with MFA to secure remote access. This end-to-end solution delivered security, redundancy, and scalability, ensuring high availability for business-critical services. 💡 Why Work With Me? I deliver IT solutions that are: 🔒 Secure – with MFA, firewalls, and proactive vulnerability management. 🚀 Scalable – built on modern cloud and virtualization technologies. 📈 Reliable – with backups, monitoring, and performance tuning in place. Whether you need system administration, virtualization, cloud setup, or IT security hardening, I provide enterprise-grade solutions with a proven track record of success. 🚀 Let’s build a secure and resilient IT environment for your business.

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Shazedur Rahim J.

4.6

4.1

83%

Dhaka, Bangladesh

$45 USD per hour

রিং (ring) is a digital freedom activist who also loves cooking. Full name Shazedur Rahim Joardar. I have a Professional Diploma in IT from NIIT in Software Engineering. I am an enthusiasts of Digital Freedom and GNU/Linux and Computing in my mother language, Bengali . I love to contribute to the society by helping people on using GNU/Linux distributions as a member of some Bengali forum. My email id is very public and open 24×7 to all of the Bengali and the South East Asian Digital Freedom enthusiasts, lovers, users and interested ones. You may communicate with me in Bengali, Hindi, Urdu and English.

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Ignacio V.

5.0

2.4

100%

Lugar de Malbusca, Portugal

$50 USD per hour

More than 25 years working with Unix systems, since 2016 mainly custom modified FreeBSD versions for amd64 and arm architectures. Plenty of experience configuring all kind of services, creating custom packages, modifying source code, automating tasks, monitoring, etc. I make things work in a reliable and long term way using simplicity and common sense.

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How to hire a great freelance OpenBSD Expert

An OpenBSD expert is a systems engineer who specializes in deploying, securing, and maintaining servers and network appliances running the OpenBSD operating system. OpenBSD is a Unix-like, security-focused open-source OS widely used for firewalls, routers, mail servers, and other infrastructure where correctness and proactive security matter more than feature bloat. Hiring an experienced OpenBSD administrator on Freelancer.com gives you direct access to engineers who can harden your infrastructure, configure PF firewalls, and run mission-critical services with minimal attack surface.

What an OpenBSD expert delivers

An OpenBSD specialist builds and maintains the lean, audited infrastructure that runs the quiet parts of the internet — perimeter firewalls, VPN concentrators, authoritative DNS, and SMTP gateways. Because OpenBSD ships secure by default and removes legacy code aggressively, projects move faster when an engineer already knows the system's conventions, base tools, and patching cadence.

Engaging an OpenBSD consultant gives your business measurable outcomes: a reduced attack surface, predictable upgrade cycles every six months, and infrastructure documented well enough to be handed to in-house staff. The work matters commercially because a single misconfigured firewall or mail relay can cost more in downtime and incident response than the entire engagement.

Common tasks and deliverables

OpenBSD freelancers handle the full lifecycle of OpenBSD systems, from architecture to long-term maintenance. Typical deliverables include:

PF (Packet Filter) firewall rulesets with NAT, queueing, and stateful inspection

OpenBSD router and gateway builds with CARP and pfsync for high availability

VPN setup using IPsec (iked), WireGuard, or OpenVPN

OpenSMTPD mail server configuration with SPF, DKIM, DMARC, and spam filtering

httpd and relayd web hosting with TLS via acme-client and Let's Encrypt

Unbound and NSD DNS resolver and authoritative server deployments

OpenSSH hardening, key management, and bastion host configuration

Disk encryption with softraid crypto and secure boot configuration

Custom kernel builds, syspatch automation, and base system upgrades

Monitoring with sensorsd, snmpd, and integration with external observability stacks

Package management with pkg_add, ports tree compilation, and private port maintenance

Security audits, log review with newsyslog, and incident response playbooks

Tools, subsystems, and methodologies

A capable OpenBSD engineer is fluent in the base system rather than reliant on third-party stacks. Expect strong working knowledge of PF, OpenSMTPD, OpenSSH, LibreSSL, httpd, relayd, unbound, nsd, iked, and the rc.d service framework. Many engagements also involve doas for privilege separation, ksh scripting, and the ports and packages system for adding software like nginx, PostgreSQL, or Redis when the base system does not cover a need.

Adjacent skills that frequently appear alongside OpenBSD expertise include FreeBSD and NetBSD administration, Linux systems administration, network engineering, DNS architecture, TLS and PKI management, and shell scripting. Engineers familiar with Ansible or similar configuration management tools can automate fleet management across multiple OpenBSD hosts.

Industries and use cases

OpenBSD is the operating system of choice in environments where security, auditability, and stability take priority. Common use cases include:

Financial services and fintech firms running perimeter firewalls and jump hosts

Hosting providers and ISPs operating BGP routers, DNS servers, and mail infrastructure

Healthcare and legal organizations with strict data handling requirements

Government and defense contractors needing auditable, minimal systems

Small and mid-sized businesses replacing commercial firewall appliances with self-hosted gateways

Academic and research institutions running secure mail and authentication services

Privacy-focused services such as VPN providers and secure email hosts

How to evaluate OpenBSD candidates

Strong candidates show a long track record with Unix-like systems and specific experience with OpenBSD releases, not just generic Linux administration. Look for portfolio evidence of production PF rulesets, mail server deployments, or contributions to the ports tree. Engineers who follow the misc@ and tech@ mailing lists, track CVS or Got commits, or maintain their own ports tend to bring deeper knowledge than those who have only read tutorials.

Useful signals during evaluation include familiarity with the OpenBSD release cycle, comfort with man pages as primary documentation, and a habit of writing minimal, readable configuration. Ask candidates to walk through a previous build and explain the trade-offs they made.

Sample interview questions you can use directly:

Can you describe a PF ruleset you have written for a multi-interface firewall, including how you handled NAT and stateful inspection?

How do you approach upgrading an OpenBSD server between releases, and what is your rollback plan if something breaks?

What is your preferred setup for a hardened OpenSMTPD mail server with SPF, DKIM, and DMARC?

How would you configure two OpenBSD firewalls for active-passive failover using CARP and pfsync?

When would you choose to build a port from source versus installing a pre-built package, and how do you keep custom ports maintained?

Why hire OpenBSD experts on Freelancer.com

Freelancer.com gives you access to a global pool of systems engineers with verified profiles, client reviews, and portfolios covering exactly the BSD, network security, and Unix administration work you need. Because OpenBSD expertise is specialized, the ability to compare candidates across regions and time zones matters — Freelancer.com makes that comparison straightforward.

Clients set their own budgets and receive competitive bids from freelancers on Freelancer.com, so pricing reflects real project scope rather than fixed agency rates. Milestone Payments hold funds securely until you approve deliverables, which is particularly valuable for infrastructure work where you want to verify firewall behavior or mail flow before releasing payment. Whether you need a one-time hardening review or an ongoing maintenance contract, you can hire on Freelancer.com with the protection of a structured engagement and a public review trail.

Ready to harden your infrastructure with a proven specialist? Post a project on Freelancer.com today and connect with skilled OpenBSD freelancers ready to deliver.

What are the steps to hiring a freelance OpenBSD expert?

Hiring an OpenBSD specialist on Freelancer.com is a three-step process designed to surface engineers whose experience genuinely matches the work. Because OpenBSD projects often touch firewalls, mail flow, and other production-critical systems, a well-written brief and careful candidate review pay off quickly. The steps below walk through what to do at each stage.

Step 1: Post your project on Freelancer.com

The project post is the single biggest determinant of bid quality. A clear, technical brief filters out generalists and attracts engineers who already work with OpenBSD in production. Head to the post project page , where you fill in the brief, scope, timeline, and budget before publishing the project for freelancers to bid on.

The OpenBSD version you are targeting and whether this is a new build or an existing system

The specific services involved, such as PF, OpenSMTPD, httpd, relayd, unbound, or iked

Network topology details, including number of interfaces, public IPs, and any HA requirements like CARP

Compliance or security constraints that affect configuration choices

Deliverable expectations such as documentation, runbooks, configuration files, or knowledge transfer sessions

Timeline, maintenance windows, and any change management procedures the freelancer must respect

Step 2: Review bids from freelancers

Bids are short proposals, not just price quotes. They reveal how each freelancer interprets your brief, what approach they plan to take, and whether their timeline is realistic. Read each bid carefully and shortlist candidates whose technical reasoning matches the scope you described.

Look for proposals that name specific OpenBSD subsystems and reference the exact services in your brief

Note bids that ask intelligent clarifying questions, such as which release you are upgrading from or how syspatch is currently handled

Check whether the proposed timeline accounts for testing, failover validation, and documentation, not just initial configuration

Favor bids that mention concrete tools and methodologies like PF, relayd, acme-client, doas, or ksh scripting

Use Freelancer.com chat to request sample configurations or ask how the freelancer would handle a specific scenario from your environment

Step 3: Evaluate freelancers and award the project

The final decision combines proposal quality with profile evidence. Portfolios, ratings, and written reviews matter more than any single talking point in a bid, and consistency across past OpenBSD or BSD work is a stronger signal than one standout project. Weigh the full picture before awarding.

Portfolio depth showing real OpenBSD work — PF rulesets, mail server builds, or HA firewall pairs

Star ratings combined with the number of completed projects, not just a high average from a small sample

Written client reviews that mention systems administration, security, or networking outcomes

Verified payment method and identity verification on the freelancer's profile

Completion rate and on-time delivery rate, both important for infrastructure work with planned maintenance windows

Award the project and fund Milestone Payments, which release only when you approve each agreed deliverable, protecting you throughout the engagement

What is the difference between an OpenBSD expert and a Linux system administrator?

A Linux administrator works with distributions like Debian, Ubuntu, or RHEL, which use different init systems, package managers, and firewall tools than OpenBSD. An OpenBSD expert specializes in the BSD userland, PF firewall, and the project's specific release cycle and security model. Many engineers do both, but for OpenBSD-specific work you want someone who has run the OS in production.

Can I hire an OpenBSD freelancer for a one-off project?

Yes. Many OpenBSD engagements are scoped as one-off projects, such as building a firewall, migrating a mail server, or conducting a security audit. You can also retain the same freelancer afterwards for periodic patching and maintenance, which is common for OpenBSD systems given the six-month release cycle.

How long does a typical OpenBSD project take?

A straightforward firewall or VPN build often takes a few days, while a full mail server deployment with anti-spam, TLS, and monitoring may take one to two weeks. Larger infrastructure projects involving high availability, multiple services, and documentation can run several weeks. Sharing a clear scope in your brief lets freelancers give accurate timelines in their bids.

Do I need an OpenBSD expert or a general network engineer?

If your infrastructure is built on OpenBSD or you specifically want to use it for its security properties, hire an OpenBSD expert. If you are still selecting an operating system, a network engineer with BSD experience can help you choose between OpenBSD, FreeBSD, or a Linux-based alternative based on your requirements.

What information should I share with an OpenBSD freelancer before the project starts?

Share your current network diagram, the OpenBSD version you are running or planning to deploy, the services involved, and any compliance constraints. If existing configuration files exist, providing sanitized copies helps the freelancer estimate effort accurately and propose a realistic approach.