iptables Experts in Germany
, matched with vetted freelancers in minutesHire experts who design firewall policies, troubleshoot Linux packet filtering and migrate legacy rules toward nftables. Get precise access to vetted, available freelancers who match your infrastructure needs quickly.
Meet FRATCH Experts in Germany, who have recently used iptables
Rudolf E.
Last position:
Datacenter Engineer, Network & Security Administrator at International Insurance Group
Operation and further development of the network and security infrastructure.
Monitoring, analysis and resolution of network and security incidents.
Cross-departmental collaboration with other teams on operations and further development, and reporting.
Firewall vulnerability analysis.
Firewall access requests.
Troubleshooting IP communication issues on network and firewall infrastructure.
Security-critical IT infrastructure, processing of personal data, compliance with legal requirements.
Products: Palo Alto Networks Firewalls, Cisco ACI, Checkpoint Firewalls, F5
Technologies: SDN, SDWAN, Cisco EPIC, Cisco ACI
Lothar H.
Last position:
Solution Manager for the investigation PoC and exchange and refinement of an existing cloud and IoT power plant control system at Shell AG and NEXT Kraftwerke GmbH
- Investigation PoC and exchange and refinement of an existing cloud and IoT power plant control solution for certificate management of renewable energy power plants (solar, wind, biomass and others) of the largest European renewable energy power plant operator in this field, including investigation of the IoT devices used in the field and their integration and network connection with the aim of automated PKI key management.
- Messaging with Kubernetes for large API-connected enterprise applications
- Risk and Attack Vector Analysis, Software Quality & Bug Assessments
- Agile Workload Scheduling via Jira & ConJluence
- Evaluation of message streams Pub/Sub for MQ and KaJka.
- Various tests with “best design approaches” regarding resilience patterns such as Circuit Breaker Designs, Throughput Measurement and Monitoring, Bulkhead Governors - for robust EA design
- Integration of API Management with IBMs API Connect to Kubernetes - for agnostic Microservices API Management Designs. Google Apigee
- Solution Health Check Approaches for Load Burst Situations + Remedy
- Research and investigation of available potential subcontractors in the coordinating role as Solution Manager. CIS20 Controls.
- Dread and Stride Security Assessments.
Thomas P.
Last position:
Unix/Linux Administrator at BDAV Verwaltungs GmbH
- Consulting and project management to build an AI-based automation platform for market data analysis
- Automated testing of financial data
- Market data automation with Python and N8N
- AI data integration and AI learning
- Use of Ollama and Qwen
- Data organization and database management
Vitaliy R.
Last position:
DevOps GitOps (temp) at Signal Iduna
- Responsible for Openshift/Kubernetes on-prem administration and developer support.
- Developed URP infrastructure automation with Python, Ansible, Kustomize and ArgoCD, Argo Workflow/Events stack.
- Wrote smoke and load tests for URP infrastructure utilizing Python, Kustomize and ApplicationSets.
- Helped to set up and deploy URP infrastructure in Google Cloud, GKE.
- Set up monitoring for URP and ArgoCD stack with Splunk Cloud.
- Performed system administration tasks across RedHat Linux, Kubernetes/Openshift, ArgoCD, GitLab, Bitbucket Enterprise, Kafka and MongoDB.
Martin W.
Last position:
Security Auditor at MissionMe
- Environment: AWS, Ruby on Rails, GraphQL, React Native
- Penetration test for Backend, Android-App and iOS-App
Dirk P.
Last position:
Freelance Cyber Defense Lead & KRITIS/NIS2 Consultant | AI Security Architect at Self-Employed
Situation: Increasing demand for privacy-compliant AI solutions for clients in the KRITIS and mid-market sector that need to analyze sensitive media content (audio, video, documents) without sending data to public cloud LLMs.
Task: Design, deployment, and secure operation of a fully self-hosted AI infrastructure including a custom-built digital management platform for automated media analysis.
Action: Architected and implemented a multi-tier platform on hardened Proxmox infrastructure with frontend (Nuxt 3, Vue 3, TypeScript, Tailwind 4), backend (Laravel 13, PHP 8.4, Sanctum), data storage (PostgreSQL 16, MongoDB 7), caching/queuing (Redis 7, Laravel Queue), AI workers (Python 3.11, Whisper, DeepFace, Librosa), scheduling (Laravel Scheduler/Cron), and local LLMs (Gemma, DeepSeek, Qwen, Mistral, LLaMA, Phi) via OpenWebUI with segmented network access, API hardening, and audit logging following BSI recommendations.
Result: Fully GDPR-compliant, on-premises AI platform with zero data leakage to third parties.
Task: Overall responsibility as an external Head of Cyber Security / CISO-as-a-Service for the design, implementation, and continuous improvement of ISMS according to ISO 27001, BSI IT-Grundschutz, and NIS2.
Action: Built and managed Cyber Defense Centers (CDC) with SOC operations, integrated SIEM solutions (Splunk, Graylog), established risk-based vulnerability management (Qualys, Nessus, OpenVAS), and conducted regular infrastructure, application, and physical penetration tests.
Result: Audit-ready ISMS for multiple clients and a 60% reduction in critical vulnerabilities within 90 days.
Task: Design and execution of NIS2 assessments and operational roll-out plans for KRITIS operators.
Action: Developed an online assessment tool for automated identification of individual weakness profiles, implemented ISMS optimizations, penetration testing, awareness programs, GRC suite deployment, and delivered C-level presentations.
Result: Accelerated the consulting process by 50% and successfully prepared multiple clients for NIS2 compliance.
Task: Incident commander for crisis response, forensics, and business recovery in ransomware attacks and APT campaigns.
Action: Coordinated with state and federal police (LKA, BKA), performed forensic analysis (OSForensics, Wireshark, Kali Linux), executed disaster recovery and BCM strategies, and developed BTC extortion response strategies.
Result: 100% recovery rate within defined RTO windows and sustainable post-incident security architectures.
Action: Planned, built, and operated a hardened multi-VM infrastructure (Proxmox, 15+ VMs) with web and mail servers, Graylog, OPNsense firewalls, CRM/ERP and LLM instances, network segmentation, DDoS mitigation, automated patch management, and backup strategies.
Result: >99.5% uptime over 20+ years and zero compromises.
Action: Designed coordinated phishing campaigns with five levels of difficulty, developed e-trainings and webinars in a PDCA cycle, and led red and blue teams.
Result: Phishing click rate reduced from 35% to under 5% within three campaign cycles.
Arkadius S.
Last position:
AWS Pricing Platform / API & Integration Architecture at Porsche Digital
Development and evolutionary further development of a highly available, cloud-native microservice and integration architecture for dealer and retail processes in the Porsche Car Configurator.
Responsibilities
- Development of Java-/Kotlin-based backend, API, and integration components (Spring Boot)
- Integration of internal and external systems via REST/OpenAPI, GraphQL, Apache Kafka, and AWS SQS (synchronous and asynchronous)
- Implementation of stable, high-performance communication and data flows in a cloud-native platform architecture
- Processing of structured data formats (JSON, Protobuf, GraphQL schemas) based on existing API patterns
- Performance optimization of distributed microservices with reduced response times and higher operational stability
- Technical tests (unit, integration, and API tests) as well as error analysis in production-like environments
- AWS Infrastructure as Code with Terraform and AWS CDK
- CI/CD automation (build, test, and deployment pipelines) with GitHub Actions
- AI-supported feature implementation (GitHub Copilot Agent)
Label: Kotlin, Java 25, Spring Boot 4, Protobuf, TypeScript, AWS, Terraform, CDK, Apache Kafka, AWS SQS, REST/OpenAPI, GraphQL, JSON, PostgreSQL, Docker, GitHub Actions, Maven, Gradle, JUnit, Mockito, Testcontainers
Andreas I.
Last position:
Cybersecurity Specialist Assessor at Bundesnetzagentur
- Recognition of national notified bodies
- Preparation of cybersecurity competency reports
- EU Radio Equipment Directive
Matthias S.
Last position:
Subproject Manager / Head of Monitoring at IT service provider (Berlin/Kolbermoor)
- Subproject Manager / Head of Monitoring for facility management and handling operational project parts as well as coordinating operations
- CheckMK consulting: central monitoring infrastructure with CheckMK master and distributed CheckMK satellites
- Implementation of advanced monitoring approaches, integration of new plugins and customization of the CheckMK agent
- Graphic representation of performance metrics with InfluxDB and Grafana, creation of NagVis/Grafana templates and dashboards
- Monitoring of Linux/UNIX/Windows systems and active components using CheckMK agents/MRPE as well as hardware monitoring via SNMP
- Development of monitoring plugins based on Bash scripting
- Inventory and cross-disciplinary analysis for application-specific monitoring
- Concept design, testing and documentation for integrating CheckMK status messages and performance data into a higher-level umbrella system (Data Leak)
- Technical and conceptual point of contact
Majid A.
Last position:
Lead Consultant at Infosys
- Network automation
- CI/CD and Docker environment
- Python Nornir for network automation
- pyATS for monitoring and test case automation
- Network Access Control (Radius) and Device Admin Access Control (TACACS) with AAA and Cisco ISE with Cisco/HP/Aruba Devices
- Cisco ISE Clusters (2/4/8 nodes) configuration
- Cisco ISE Authentication and Authorization configuration
- Cisco/HP/Aruba Switch/WLC Tacacs/dot1x/Radius configuration
- Cisco ISE automation with Restconf and Python
Cesar S.
Last position:
Lead Cloud Engineer at Charge-V GmbH
- Responsible for setting up and configure AWS Organizations and Control Tower on company's master organizational account
- Administer and maintain various AWS services, including EC2, S3, RDS, Lambda, VPC, IAM, etc.
- Monitor system performance, availability, and capacity planning to ensure scalability and reliability
- Implement and maintain infrastructure as code (IaC) using tools like CloudFormation or Terraform
- Work closely with development and operations teams to automate deployment processes using CI/CD pipelines (e.g., Jenkins, GitLab CI/CD)
- Develop and maintain scripts for automating routine tasks and infrastructure provisioning
- Implement automation for monitoring, logging, and alerting to ensure timely incident response
- Implement and enforce security company guidelines and best practices for AWS environments
- Configure and manage AWS security services such as AWS Identity and Access Management (IAM), AWS WAF, AWS Shield, etc.
- Collaborate with the Security Team to improve and update security policies and posture
- Collaborate with development teams to provide agile deployments and optimize application performance and reliability on AWS
- Provide technical support and guidance to internal teams on AWS-related issues and best practices
- Participate in cross-functional projects to enhance overall infrastructure and operational efficiency
Marcus R.
Last position:
Team Manager at dogado GmbH
- Team leader for Operations Mass Hosting in DACH, Finland and Norway
- Team leader for Engineering Mass Hosting in DACH and Finland
- Responsible for Webhosting & Mail for the dogado Group in DACH and Finland
- Managed a team of 12 Linux administrators, both technically and disciplinarily
Daniel W.
Last position:
Web Developer and Linux System Administrator at Freelancer
- Consultation on setting up a web server with Apache2 and PHP FPM and an email server with Postfix and Dovecot for Learn4good Ltd.
- Programmed website under-construction.bermudafunk.org in collaboration with a designer and client for bermuda.funk Freies Radio Rhein-Neckar e.V.
- Consultation and network setup on-site including switches, routers, Wi-Fi, network monitoring, firewalls, and installation of sFirm banking software for The Swiss Quality Consulting GmbH
- Consultation on website management and development, email migration from Outlook to cPanel, image optimization, and setting up Square payments for The JABA Group Ltd.
- MS365 consultation, email setup, and document synchronization for PK reno GmbH
- Development and integration of WooCommerce plugins, B2B shop setup, and custom shipping label export for Nurso GmbH
- Minor changes implementation for existing Kirby system for Julia Rautenhaus
- Analysis and fixing of WordPress website after broken updates for Alina Frey
- Linux server hardening, updates, and throughput optimization for 3proxy servers for Lietparkas UAB
- Malware removal from hacked WordPress website for Timo Horn
- Cold email outreach system setup with Postfix and Dovecot and script development for Aman Ketebo
- Customized Docker container creation based on AlmaLinux with ImageMagick 7 and consultation on Docker installation for Henry Hook
- Plesk hosting environment management, code fixes, external supplier integration, and content support for First Class Corporation
- Shopify theme customization, feature development, and payment integration consultation for Youro GmbH
- Intel camera support on Ubuntu after upgrade for Making stories with a lesson
- NginX configuration support on Windows Servers for a NodeJS application for ARMBRUSTER empiric it
- Competitor email verification mechanism analysis for Casey Monaghan
- Plugin development and API connector to Inswitch for freelance website payments for Mediaquotes
- Private XMPP server setup on Raspberry Pi for Antonio Codespoti
- WordPress website recovery after broken plugin update for A & R Tennis
- Microsoft account and Office/Outlook migration support for Prof. Dr. Hanns-Ferdinand Müller
- Customization and performance optimization of client websites for sk.design
- VPN configuration and hacked server cleanup for Xisio Informationssysteme GmbH
- PeerTube server setup and maintenance for Lupin Vondosky
- Lightweight WordPress booking solution programming tailored to client needs for AP Online Marketing
- Code refactoring, bug fixing, and business/technical consultation for RentAfrika
- SellYourSaas setup and deployment infrastructure configuration for I-Motion SARL
- Server, email, GitLab, project management, password management software, and VPNs setup and maintenance for Markus Sattler
- Custom development for over 10 WordPress projects for TOGEMAXX media & webdesign
- WooCommerce shop setup and FTP supplier product import development for SERVOMED GmbH
- Open-source contributions to Whonix components, iptables to nftables migration, shutdown inhibition investigation, and IPv6 support addition for ENCRYPTED SUPPORT LP
- Custom feature development, performance optimization, update management, email delivery support, plugin bug fixes, and translations for KU Europe GmbH
- Custom plugin/theme development, server infrastructure management, support for 100+ WordPress websites, API connector development, deployment script setup, VPN configuration, DNS, email, and web hosting support for giftGRÜN GmbH
- Server setup, web and email hosting migration, and website maintenance and development for Eisbaden.de
- Custom WordPress and Shopify development for EcomPlus GmbH
- Hacked website recovery and hosting migration for Be Brave gUG
- Finalization of development tasks left incomplete by another developer for Medicare Consulting GmbH
- Recovery of unbootable hacked server for SK-Software, Entwicklung & Beratung
Hobby projects:
- Development and running of a web chat application
- Development and running of an email service
- Development and running of a darknet link list
- Development and running of a darknet web hosting platform
- Code contributions to open source projects such as LMMS, Audacity, and Ubuntu
Martin F.
Last position:
IT Security Consultant at Freelance
Alexander W.
Last position:
Freelance Head of Development / Strategy Consultant at LabMaker GmbH
- Consulting on a wide range of open science hardware projects in the fields of electronics, mechatronics, and optoelectronics
- Comprehensive system analysis and DFM optimization of a novel open hardware miniaturized two-photon microscope
- Exchange with scientists from renowned academic institutions to align the customer’s work in the best possible way
- Production coordination with local and international partners for PCB assembly, CNC machining, and optics
- Process analysis for product design, production planning/execution, product lifecycle, and product data management
- Coaching employees from all departments on the requirements that complex technical products place on business processes
- Development of a comprehensive PLM & PDM concept tailored to the needs of development and manufacturing
- Initiating intensive and direct cross-departmental exchange to identify improvement potential
- Planning shopfloor layout improvements with the production team and supporting the implementation process
- Quick onboarding of two new English-speaking colleagues in technical product management and development
- Ad-hoc and in-depth training of employees in the use of software tools such as KiCad or Autodesk Inventor
- Consulting on long-term development into a scalable, even stronger partner for the open science hardware community
Discover over 15,000 top freelancers
Statistics of experts using iptables
Aggregated from the professional profiles of matched freelancers.
Experience
23 years
Position duration
2.7 years
Positions per freelancer
13
Top business areas
Information Technology, Operations, Product Development
Top industries
Information Technology, Banking and Finance, Manufacturing
Certification focus areas
Information Technology, Audit, Legal
Bachelor's degree or higher
71%
Master's degree or higher
43%
Certifications per freelancer
3
Most common languages
German, English, Spanish
Speak two or more languages
100%
Based on our profile pool as of 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Germany are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows the share of experts charging within that range.
Average rates of experts in Germany using iptables
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
iptables experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Information Technology (95%)
- Banking and Finance (55%)
- Manufacturing (50%)
- Telecommunication (45%)
- Automotive (35%)
- Media and Entertainment (35%)
- Retail (35%)
- Healthcare (30%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Linux packet filtering
iptables is the command-line interface for configuring packet filtering and network address translation on Linux. It works with the Netfilter framework in the kernel and evaluates traffic against ordered rules in tables and chains. Companies use it to control access, segment systems and protect services at the host or network boundary.
Rules and traffic control
An iptables policy can match source and destination addresses, ports, interfaces, connection state and protocols. Rules can accept, reject, drop or redirect traffic, while NAT handles address translation and forwarding. Specialists also manage default policies, rule ordering and persistence so a firewall behaves predictably after a restart.
Ecosystem and tooling
iptables expertise often includes the surrounding Linux networking stack:
- Netfilter hooks, conntrack and stateful inspection
- iptables-save, iptables-restore and distribution firewall services
- iptables-nft compatibility and nftables migration planning
- Docker, Kubernetes and VPN traffic rules
The right approach depends on the Linux distribution, kernel behavior and how other tools generate or modify rules.
Where companies use it
iptables runs on web servers, application hosts, gateways, VPN endpoints and embedded Linux systems. It supports private network access, container isolation, port forwarding, service exposure and controlled administration paths. German companies may need specialists who can work remotely with infrastructure teams or join on-site operations when network changes require local coordination.
When to bring in expertise
Freelance support is useful when firewall behavior is unclear, remote access must be changed safely or a rule set has grown difficult to maintain. Typical assignments include:
- Reviewing exposed ports and simplifying policies
- Diagnosing dropped packets, NAT faults and forwarding issues
- Hardening Linux hosts and documenting approved flows
- Migrating iptables rules to nftables without service disruption
A specialist can also validate changes in staging and define a rollback procedure.
What strong specialists deliver
Strong professionals understand packet flow, routing, DNS, TCP and UDP, not only command syntax. They trace traffic with tools such as tcpdump and conntrack, explain why a rule matches, and consider logging volume, persistence and operational recovery. Quality work leaves a readable policy, tested behavior and clear ownership for future changes.
Frequently asked questions
Before you brief your next project: the most common questions about iptables.
iptables is used to filter packets, control forwarding, perform network address translation and restrict access to Linux services. It can protect individual hosts, gateways, containers and VPN endpoints through ordered rules and connection tracking.
iptables is the older, widely documented interface for Linux Netfilter rules, while nftables is the newer framework and command language. Existing systems may still depend on iptables commands, but new work often assesses whether a controlled migration to nftables will improve consistency and maintainability.
iptables work benefits from knowledge of Linux administration, routing, TCP/IP, DNS, VPNs and network troubleshooting. Experience with Docker, Kubernetes, cloud security groups, tcpdump and infrastructure automation is also valuable when rules interact with other layers.
iptables tasks range from reviewing a small host policy to redesigning filtering across gateways, containers and production services. The right level depends on blast radius and operational risk; projects involving remote access, NAT or complex routing need a specialist who can test changes and prepare a rollback.
iptables configuration can often be handled remotely through controlled access, change windows and an independent recovery path. On-site collaboration in Germany may still help when hardware access, isolated networks or strict internal procedures limit remote troubleshooting.
iptables is a practical choice for host-level controls, Linux gateways, lightweight edge systems and container environments. A dedicated appliance may be better for centralized policy management, high-availability operations or teams that need hardware-specific inspection and support.
iptables quality is shown by a clear policy, least-privilege rules, correct ordering and tests for both allowed and blocked traffic. Ask the specialist to explain packet paths, document persistence and logging, verify failure recovery and show how changes can be reversed safely.
iptables professionals may deliver a rule review, hardened host configuration, NAT and forwarding setup, troubleshooting report or migration plan for nftables. Good deliverables include versioned rules, validation steps, monitoring guidance and documentation that another Linux specialist can maintain.
The average hourly rate of freelancers in Germany who have used iptables in their recent projects is 107 €, which corresponds to a daily rate of about 857 € based on an 8-hour working day.
Of the freelancers in Germany who have used iptables in their recent projects, 71% hold at least a Bachelor's degree and 43% hold at least a Master's degree.
On average, freelancers in Germany who have used iptables in their recent projects have 23 years of professional experience, with a single engagement typically lasting around 2.7 years.
The most common languages among freelancers in Germany who have used iptables in their recent projects are German (100%), English (100%), and Spanish (30%).
The most common industries among freelancers in Germany who have used iptables in their recent projects are Information Technology (95%), Banking and Finance (55%), and Manufacturing (50%).
The most common business areas among freelancers in Germany who have used iptables in their recent projects are Information Technology (100%), Operations (90%), and Product Development (75%).
Main locations of FRATCH Experts, who have recently used iptables
Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.
Berlin Hamburg Munich Cologne Frankfurt Stuttgart Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg Request a free demo
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FRATCH CEO
