We break it before
attackers do — then
keep it running.

XANTUS provides web penetration testing and Linux system administration for teams who need to know exactly where they stand, and someone who can fix what's found.

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A small team that works close to the system, not above it

Most security and infrastructure work doesn't fail because the tools are missing. It fails because no one took the time to actually look. We test what you've shipped the way an attacker would, and we run the servers underneath it the way it should have been run from day one.

We work directly with the people who own the system — founders, engineers, IT leads — with no sales layer in between. That means fewer slide decks, more terminal output, and reports you can actually act on.

  • ApproachManual-first testing, not just automated scans
  • ScopeWeb applications & Linux-based infrastructure
  • EngagementProject-based work or ongoing retainer
  • ReportingPlain-language findings, no jargon walls

Two disciplines. One goal: nothing left to chance.

Web Penetration Testing

We attack your application the same way a real adversary would: manually, methodically, and with every step documented, so you find the gaps before someone else does.

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    Reconnaissance & Information Gathering

    Mapping subdomains, exposed services, technologies in use, and your public attack surface before any active testing begins.

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    Automated & Manual Vulnerability Assessment

    Combining scanning with hands-on verification to find issues such as SQL injection, XSS, CSRF, SSRF, and other OWASP Top 10 risks.

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    Authentication & Session Security

    Testing login flows, password policies, session tokens, and multi-factor implementations for weaknesses attackers could exploit.

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    Authorization & Business Logic Testing

    Checking for broken access control, privilege escalation, and logic flaws that automated scanners typically miss.

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    API & Backend Testing

    Probing REST and GraphQL endpoints for input validation gaps, missing rate limits, and unintended data exposure.

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    Configuration & Infrastructure Review

    Identifying misconfigured headers, exposed admin panels, default credentials, and outdated components.

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    Detailed, Rated Reporting

    A clear write-up with severity ratings, proof-of-concept steps, and the real business impact behind each finding.

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    Remediation Support & Retesting

    Practical guidance to fix what was found, plus a follow-up test to confirm the issues are actually closed.

Linux System Administration

From the first install to long-term upkeep, we set up and run Linux infrastructure that's stable, documented, and built to resist the same attacks we test for.

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    Server Setup & Provisioning

    Clean installation and initial configuration of Ubuntu, Debian, CentOS/RHEL, or other distributions on cloud or bare-metal.

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    Network & Service Configuration

    Setting up web servers (Nginx/Apache), databases, DNS, reverse proxies, and SSL/TLS certificates.

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    System Hardening

    Applying CIS-aligned controls: SSH hardening, firewall rules (UFW/iptables/nftables), fail2ban, SELinux/AppArmor, and disabling unused services.

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    User & Access Management

    Configuring least-privilege roles, sudo policies, key-based authentication, and centralized access control.

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    Monitoring & Logging

    Implementing log aggregation, intrusion detection, and uptime/resource monitoring with real alerting.

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    Backup & Disaster Recovery

    Designing automated backup schedules and tested recovery procedures to minimize downtime.

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    Patch & Update Management

    Scheduling and validating security patches on a regular cadence without disrupting production workloads.

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    Performance Tuning

    Optimizing kernel parameters, resource limits, and service configurations for stability under real load.

A straightforward process, in order

  1. 01

    Free Consultation

    We talk through your goals, your environment, and what's actually worrying you. No cost, no commitment.

  2. 02

    Scoping & Proposal

    We define exactly what's covered, what isn't, and send a clear, fixed proposal before anything starts.

  3. 03

    Execution

    Testing or infrastructure work is carried out in a controlled window, with progress documented as we go.

  4. 04

    Reporting & Handover

    You receive findings or documentation written in plain language, not just raw scanner output.

  5. 05

    Follow-Up

    Retesting or check-ins to confirm fixes hold and the system stays in the state you expect.

Not sure which service you need — or if you need one at all?

Book a free, no-obligation consultation first. We'll review what you have, ask a few direct questions, and tell you honestly what matters and what doesn't, even if that means saying you don't need us yet.

Talk to Us — No Cost, No Pressure

Tell us what you're working with

Direct Contact

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maswafa@bugcrowdninja.com