Networking & Pen Testing Specialist

@ExpertNetworkEng

Hello, I’m a Senior Network & Security Engineer with 10+ years of hands-on experience designing, implementing, and migrating enterprise and service-provider networks. I specialize in Network Security, SD-WAN, routing & switching, enterprise wireless, and secure network architecture, helping companies modernize legacy networks, improve reliability, and reduce WAN costs. Core expertise: - Firewalls & Security: FortiGate, Palo Alto, Cisco ASA / Firepower IPsec & SSL VPN, site-to-site, remote access, policy design - Routing & Switching: Cisco ASR/ISR, Catalyst, Nexus, Juniper Routers (M10, MX 960) and SRX 500 (BGP, OSPF, EIGRP, IS-IS, MPLS, VLANs, STP, HSRP/VRRP) Enterprise LAN & campus design - LAN Switching (Multi-Vendor): Cisco, Juniper, Meraki, HP, Aruba, FortiSwitch Access/core design, redundancy, QoS, segmentation - Enterprise Wireless: Cisco WLC & APs, Cisco Meraki Wi-Fi, Ubiquiti, Aruba Wi-Fi, FortiAP Coverage design, roaming, security, troubleshooting - SD-WAN: Fortinet SD-WAN, Cisco SD-WAN (Viptela), Cisco Meraki (hub-and-spoke, MPLS + Internet, segmentation, HA, traffic steering) - Cloud & Hybrid Networking: AWS / Azure / GCP Site-to-site VPN, routing integration - Network Automation: Python Certifications: CCIE Enterprise Cisco Certified Specialist – Enterprise SD-WAN Implementation CCNP Data Center CCNP Security Juniper JNCIA-Junos, JNCIA-Cloud If you share your current setup and goal, I can propose a clear and practical solution. Best regards,

@offensiumvault

We at Offensium Vault Private Limited (ISO/IEC 27001:2022 & ISO 9001:2015) provide network infrastructure implementation and security assessment, covering secure network design, configuration, vulnerability assessment, and penetration testing. Approach • Layer-2/Layer-3 configuration covering routers, switches, IP addressing, VLANs, DHCP, routing, and segmentation. • Configuration validation, change documentation, rollback procedures, and cut-over troubleshooting. • Network reconnaissance, vulnerability assessment, and targeted security testing using Nmap, Nessus, Kali Linux, and relevant tools. • Assessment of exposed services, misconfigurations, segmentation, access controls, and exploitable attack paths. • Controlled testing within the authorized scope to validate security impact. Deliverable • Network configuration and change documentation. • Security report covering methodology, scope, vulnerabilities, CVSS ratings, evidence, PoC screenshots/packet captures, and prioritized remediation. • Editable Word/Markdown documentation with applicable raw scan results. The proposed timeline is 3 days for infrastructure configuration and 2 additional days for security testing, subject to environment complexity. Required prerequisites include network diagrams, device models/current configurations, authorized scope, and VPN or secure jump-box access. Available to initiate upon confirmation of the environment and access requirements.

@Noorulamin331

Hello, I have reviewed your on-premises network refresh and security testing project. With 5+ years in software engineering and deep expertise in infrastructure design and offensive security, I can deliver both phases. Infrastructure: I will design and configure Layer-2/Layer-3, covering router/switch config, IP addressing, VLAN segmentation, and DHCP where required. The topology will be clean and resilient, with clear change notes for rollback and documented fixes for any cut-over issues. Security testing: I will perform network scanning, full vulnerability assessment, and targeted testing using Nmap, Nessus, Kali Linux, and equivalents—probing every door and window. Hand-off report: methodology and scope, vulnerabilities with CVSS scores, PoC screenshots/packet captures, and prioritized remediation recommendations. Delivered in Word/Markdown plus raw scan results. I can work remotely via VPN or specify secure jump box requirements. I understand your phased timing: configuration phase, then security testing. Please share network diagrams, device models, and current configs, and I will confirm estimated hours per phase. Let me refresh and harden your network. Noor ul Amin

@PakTjip

Hi, I am member of hackerone and yeswehack being an ethical white hack. Drop me coffee and I start working immediately, estimated in 2days, but please notice that iam at +7 Timezone.

@FizzaNadeemK

I can handle the network refresh and authorized security assessment, including L2/L3 design, VLANs, IP addressing, DHCP, router/switch configuration, troubleshooting, and rollback documentation. I’ll then perform vulnerability scanning and targeted security testing using tools such as Nmap, Nessus, and Kali, with findings documented by severity/CVSS, evidence, and prioritized remediation steps. You’ll receive the updated configurations, change notes, editable security report, raw scan results, and clear handover documentation.

@Pabloalcastro

Hello, I'm Pablo Castro, a network and security engineer with 15+ years in IT and 5+ years as a security lead. I'm SysAdmin & Security Lead at AxionLift S.A., founder of Sentrix (security consultancy), CCNA-certified and an Ethical Hacking expert (UTN). I work daily with routing/switching, VLAN segmentation, firewalls, Linux, and vulnerability scanning. How I would deliver your project: Phase 1 – Infrastructure (3 days) - Review current topology, device models and configs. - Design and configure Layer-2/Layer-3: VLANs, inter-VLAN routing, IP plan, DHCP. - Write clear change notes with rollback steps for every change; troubleshoot the cut-over and document fixes. Phase 2 – Security testing (2 days) - Network discovery and scanning with Nmap, vulnerability assessment with Nessus/OpenVAS, and targeted testing from Kali Linux, within the scope you authorize. - Test segmentation between VLANs, exposed services, weak credentials and misconfigurations. Deliverables - Editable report (Word or Markdown): methodology and scope, findings with CVSS scores, evidence (screenshots/packet captures), prioritized remediation steps, plus raw scan results. To estimate hours accurately I need: network diagram, device models, current configs, number of VLANs/devices, and your preferred access method (VPN or jump box). Happy to start this week. Best regards, Pablo

@selaaf

VLAN segmentation, IP addressing and DHCP come first, with change notes written as I go so you can reproduce or roll back any step. Send the current configs, device models and a network diagram, and I'll give you estimated hours for each phase once I've read them. After the cut-over I'd scan with Nmap and Nessus, test what rattles, and hand over an editable report with CVSS scores, proof screenshots, raw scan results and prioritized fixes. Can you give me VPN access, or would you rather set up the jump box? Once the diagrams are ready, I can go through them with you. Sela

@nabilpevekar

Hi, I can help with your network configuration and authorized penetration testing. I have hands-on experience with networking, Nmap, Nessus, Wireshark, Kali Linux, vulnerability assessment, and troubleshooting. I can handle network discovery, security testing, vulnerability identification, reporting, and remediation recommendations. Available to start immediately. Best regards, Nabil

@WebGraphics4You

Hello, As an end-to-end executor, I believe my broad and versatile skillset enables me to manage multiple aspects of network configuration and security testing. I can design your Layer-2 and Layer-3 infrastructure while also deploying necessary security measures. Plus, I am proficient in using Nmap, Nessus, Kali Linux, and similar tools to perform comprehensive vulnerability assessments and targeted penetration tests. My clients appreciate my strategic, human-centric mindset that puts equal emphasis on building and breaking systems. I won't just produce test results for you but also provide a clear roadmap for remediation with prioritized recommendations. I will ensure that your hand-off includes well-documented findings, covering the methodology, scope, vulnerabilities (with CVSS scores where applicable), proof-of-concept screenshots or packet captures - all delivered in an editable format. Lastly, my dedication to delivering authentic custom work aligns well with your project's requirements. Your network security isn't just another generic setup; it deserves a personalized approach. With me, you'll get a tailored solution that addresses your unique needs and guarantees a resilient infrastructure fortified against potential threats. Let's collaborate to provide you with an exceptional solution that stands out from the rest Thanks!

@michela542

Hello, As a highly skilled AI agent developer, full-stack engineer, and MVP expert, I know what it takes to build and test robust systems -- which makes me the perfect candidate for your project. Leveraging my 6+ years of experience, I can confidently state that I don't merely compose software; I craft dependable, scalable solutions. In addition to advanced coding proficiency in relevant areas such as Nmap, Nessus, and Kali Linux, I also possess vital knowledge across core network administration subjects. Cisco routing and switching are part of my extensive networking experience. Moreover, I've spent ample time honing my documentation skills. Infrastructure work is much more than mere execution; it's about ensuring that the entire process is transparent and reproducible. I understand this necessity deeply and will not only keep your new topology clear but meticulously keep records of any changes made, so you'll be aware of how to reproduce or roll back any step at any time. When it comes to the pen-testing phase, I've worked on similar projects in the past that involved running comprehensive vulnerability assessments, using tools such as Nmap, Nessus, Kali Linux - demonstrating my deepest familiarity with the area. This background puts me in a great position to "stress-test" your network accurately: engaging every method possible to identify weaknesses so they can be addressed proactively. In conclusion, working together on this pr Thanks!

@AlexanderWC

Just completed a similar project involving comprehensive network configuration and stress-testing. I can ensure your new topology is both clean and resilient, with detailed change notes for easy rollback. My expertise includes Layer-2 and Layer-3 design, router and switch configuration, and VLAN segmentation, all complemented by a robust understanding of security tools like Nmap and Nessus. I thrive on troubleshooting and documenting every step to ensure clarity and security throughout the process. Let's dive deeper into your project and clarify any details you need. Best Regards, AlexanderWC

@afsanas37

Hi, I read your project carefully. You need your on-premises network configured (Layer-2/Layer-3, VLANs, DHCP) and then security tested to find weaknesses. I hold the Cisco Cyber Threat Management certification and completed an Information Security internship at NIFT, where I worked on SIEM monitoring, penetration testing, and GRC documentation. I am also a final-year BS Cyber Security student. How I would approach it: Review your network design and confirm the scope and devices Configure and test the setup, then run security and penetration testing Deliver a clear report with findings and recommended fixes Delivery: 4 days Price: $25 Quick question: how many devices (routers and switches) are in your network, and do you want the report in PDF or Word? I can start right away. Looking forward to your reply. Best regards, Afsana

@ahmed0amin

Hello, I can configure and secure your Layer-2/Layer-3 network, including VLANs, routing, DHCP, and Cisco devices, then perform a full vulnerability assessment using Nmap, Nessus, and Kali Linux. I have 2 years of experience in networking and cybersecurity, with hands-on experience in Cisco configuration, network hardening, and security testing. You’ll receive clear documentation, scan results, CVSS-rated findings, and prioritized remediation steps. Please share your device models, current configs, and network diagram if available. I can complete the configuration within 3 days and security testing within the following 2 days. Looking forward to working with you.

@mirimera

I’ve delivered authorized network hardening assessments for on-premises environments, including VLAN segmentation reviews, router and switch configuration validation, and vulnerability reporting. For this project, the key is documenting every Layer-2/Layer-3 change before cut-over because it makes rollback safe and the final topology reproducible. I’ll configure and validate addressing, VLANs, routing, and DHCP, then record all changes and resolve cut-over issues. Afterward, I’ll run scoped Nmap/Nessus and Kali-based testing through the approved VPN or jump box, preserving raw results and evidence. You’ll receive editable Markdown or Word documentation with methodology, CVSS-rated findings, packet captures or screenshots, and prioritized remediation actions. Thanks, Kittipong

@uuuuuu16

Hello, I am a Cybersecurity & Network Specialist with practical experience in network infrastructure design and security testing. I can help you configure and audit your local network efficiently. Here is what I will deliver for you: 1. L2/L3 Network Design: IP addressing, VLAN segmentation, and DHCP configuration. 2. Comprehensive Security Assessment: Network scanning and vulnerability checking using Nmap, Kali Linux tools, and Nessus. 3. Full Documentation: Clear, step-by-step notes on all changes made for easy rollback and future maintenance. I can start immediately. Looking forward to discussing your network setup further in chat!

@jaysone6

INTRO WE’VE JUST COMPLETED A SIMILAR PROJECT, so your post caught my attention. What would a great result look like for you? We can help you bring your project together with a clear, practical approach. MIDDLE We’ll help you achieve a robust and secure network, focusing on the clean, professional, and user-friendly result you want. Our experience in network design, configuration, and penetration testing enables us to spot the small details that make a big difference to your result. We'll ensure your Layer-2 and Layer-3 design is meticulously built, thoroughly documented, and resilient. After the infrastructure is set, we’ll perform comprehensive vulnerability assessments using tools like Nmap and Nessus, providing you with a prioritized remediation report. OUTRO Message me with your priorities, and let’s start there. Regards, Jayson.

@shaikhs318

Hello, I’m interested in working on your network refresh and security assessment project. I have hands-on experience with Linux infrastructure, server administration, deployments, troubleshooting, networking, system configuration, and technical documentation. I can assist with the infrastructure phase, including IP addressing, VLAN configuration, DHCP, router/switch configuration, troubleshooting during cut-over, and maintaining clear configuration/change and rollback notes. For the security phase, I can work within the authorized scope using tools such as Nmap and vulnerability-scanning utilities, analyze the findings, document evidence, and prepare an editable report with severity/CVSS information and prioritized remediation recommendations. Before starting, I would like to review the current network diagram, router/switch models, existing configurations, number of devices/VLANs, and the authorized security-testing scope. This will allow me to confirm the exact effort and access requirements. I can work through your VPN or secure jump box and provide the requested documentation and raw scan results. I’m available to start this week and can work toward your requested 3-day infrastructure + 2-day security-testing timeline. Regards, Sarhan

@syeda0434

Hi, I can assist with your network refresh and security assessment. I have hands-on experience in enterprise network and security operations, including routing, VLANs, DHCP, NAT, firewalls, VPNs, network troubleshooting, and security policies. I also have strong experience with Zscaler ZPA/ZIA and analyzing network connectivity and security issues. I can help with network configuration, cut-over troubleshooting, security assessment, vulnerability identification, and clear technical documentation. I’m comfortable working remotely through a secure VPN or jump box and can provide structured findings and remediation recommendations.

@davidv56304

We DAN Crew Technologies can handle the complete network infrastructure refresh and security assessment end-to-end. Our team has hands-on experience with Layer-2/Layer-3 design, VLANs, IP addressing, DHCP, routing, secure network segmentation, and troubleshooting. We will provide clear configuration/change documentation with rollback procedures to ensure a smooth cut-over. Following implementation, we will conduct authorized security testing using Nmap, Nessus, Kali Linux, and equivalent tools, covering network discovery, vulnerability assessment, and targeted validation. You will receive a detailed, professional report with methodology, findings, CVSS-based prioritization, evidence, and remediation recommendations, along with raw scan results. We can start immediately and meet your five-day timeline.