External network test
Every one of your public IPs and exposed services, tested from outside the way a stranger on the internet would.
The Problem
A Clean Scan Report Is Not the Same as a Safe Network
A scanner lists open ports and known flaws, but it cannot tell you what an attacker would actually do once they are inside your network.
Scan only
A scanner lists open ports and stops at known flaws.
Scan only
A tester chains findings to prove what an attacker reaches.
Outside only
You only test the perimeter and assume inside is safe.
Outside only
We test from inside too, as if one laptop were already breached.
Flat network
One password or one VLAN opens the whole network.
Flat network
We prove where segmentation holds and where it quietly fails.
Raw output
A tool export lists hundreds of issues with no order.
Raw output
You get findings ranked by reach, with a short fix order.
Your firewall is up, your antivirus is green, and a scan came back with a short list. Still, nobody can say what happens if one laptop gets phished. Can an attacker move from that machine to the file server? Does a shared local admin password open every desktop? Is the printer VLAN really walled off from payroll? A scan does not answer those questions. It flags ports and known flaws, then stops. The gap between a clean scan and a real attack is exactly where a breach grows, quietly, until the day it does not.
We test your network the way an attacker would. First from outside, against every public IP and exposed service, to see what a stranger can reach. Then from inside, from a small device you plug in or a VPN account, we show how far one compromised laptop gets: which servers, which accounts, which data. We prove each path with evidence, rank it by what it exposes, and hand you a fix order. You learn what is actually at risk, not just what is open.
External and internal testing
We test your public network from outside, then from an assumed breach inside, so you see both ways in.
Attack paths proven, not guessed
Each finding is chained by hand to show the real route from a foothold to servers, accounts, or data.
A fix order, not a dump
You get findings ranked by what they expose, with the handful of fixes that cut the most risk first.
Our Network Penetration Testing Process
From Scope to a Ranked Fix List in Five Steps
You approve the targets and rules, watch the external and internal phases, see each path proven with evidence, and get a ranked fix list and a retest.
You tell us your network: office sites, data center, cloud VPCs, and remote access. We agree which ranges are in scope and the testing window. You sign a written authorization, and you get a fixed scope and price. We test only systems you own or are authorized to test.
What's Included
What You Get With External and Internal Penetration Testing
You get an external test of your public network, an assumed-breach internal test, segmentation checks, proof for every finding, a ranked fix order, and one retest.
Compare Options
DeveloperLook vs an Automated Scanner vs a Large Firm
An automated scanner runs cheaply and often, and a large firm brings brand weight for formal tenders. Here is where each fits a network test and where it stops.
| Feature | DeveloperLookBest fit | Automated scanner | Large firm |
|---|---|---|---|
| Starting cost | From $1,200 | Free or monthly | Quoted per engagement |
| External testing | Every service by hand | Scanned, not tested | |
| Internal testing | Assumed breach included | Often extra | |
| Attack paths | Chained and proven | Not shown | Shown in a long report |
| Segmentation | Zones tested directly | Not checked | Sometimes checked |
| Fix help | Fixes explained | Generic advice | Report only |
| Retest | Rescan anytime | Varies by contract | |
| Best for | Offices and data centers | A quick first check | Regulated tenders |
DeveloperLook
Automated scanner
- Starting cost
- DeveloperLook: From $1,200Automated scanner: Free or monthly
- External testing
- DeveloperLook: Every service by handAutomated scanner: Scanned, not tested
- Internal testing
- DeveloperLook: Assumed breach includedAutomated scanner:
- Attack paths
- DeveloperLook: Chained and provenAutomated scanner: Not shown
- Segmentation
- DeveloperLook: Zones tested directlyAutomated scanner: Not checked
- Fix help
- DeveloperLook: Fixes explainedAutomated scanner: Generic advice
- Retest
- DeveloperLook: Automated scanner: Rescan anytime
- Best for
- DeveloperLook: Offices and data centersAutomated scanner: A quick first check
Projects We've Built
Infrastructure and Business Projects We Have Built
We build and run the web apps, dashboards, and cloud backends that sit on business networks, so we know how these systems are wired together.
Logify Project Risk and Control Management Web App
- Logistics & Transportation
- Construction
- Dashboard
Finto Corporate Website Design & Development
- Finance
- Dashboard
- Website
NextEdge Startup Web Design & Development
- Startups
- Technology
- Business
Herile IT Agency Web Design & Development
- Agency
- Website
What Our Clients Say
What Clients Say After Launch
Feedback from teams we have built and supported network-connected systems for.
We had a pretty specific idea of what we wanted our website to become, but I wasn’t sure how easily we could explain all of it to a development team. There were quite a few moving parts, and we were working toward a deadline, so I expected a few things to get lost along the way. That never really happened. They understood what we were trying to achieve, kept us updated throughout the process, and got everything ready within the agreed timeline. The final site feels much easier to navigate, works beautifully on mobile, and is noticeably smoother for our customers. It was a huge relief seeing the original idea actually turn into the website we had in mind.
The mobile experience is probably my favourite part of the new site. We had spent a lot of time making sure the desktop version looked right, and the team kept pushing us to think about how everything would actually feel on a phone too. They were right. The navigation is clean, the interactions feel natural, and everything we’ve tested so far works exactly as it should. They also went through the links, forms, integrations, and other details more than once before launch, which I really appreciated. And even after going live, we could still reach out when something came up. The whole process felt friendly, organised, and surprisingly straightforward.
What I appreciate most is that the website is actually easy for us to manage now. We can update content ourselves instead of sending a developer a message every time we need to change something small. They also paid attention to the technical SEO side, which mattered to us because we didn’t want a new website to create problems for the traffic we already had. I’ve probably asked more questions than I should have since launch, but every question has been handled patiently and without any fuss. The team is easy to work with, they explain things clearly, and when we need something changed, they focus on getting it done rather than making the process complicated.
1,250+
Projects shipped
10+
Years of experience
Top 3%
Upwork Top Rated Plus
5 stars
Average review score
1,250+
Projects shipped
10+
Years of experience
Top 3%
Upwork Top Rated Plus
5 stars
Average review score
Want results like these?
Tell us what you are building. You get a reply within 24 hours on business days, then a written estimate.
Work Culture
Why IT Teams Trust Us With a Network Test
A network test touches live systems, so how we work matters as much as what we find. These habits keep the test safe and the results useful.
Authorized and in scope
We test only ranges you own or are authorized to test, under written rules of engagement. The scope and window are agreed in writing before anything starts.
We prove the path
We do not just list a flaw. We show the route from a foothold to real data, so you can see why a finding matters and fix the right thing.
We rank by reach
Findings are ordered by what they actually expose, not by a raw tool score. You fix the handful that cut the most risk first, then work down.
We respect uptime
We avoid tests that risk outages on production gear and flag anything fragile instead. Noisy or disruptive checks are run in an agreed window.
We say when a scan fits
If a scheduled scan covers your case, we will tell you before we quote. A full network test should earn its cost against your real risk.
You own the report
The report, proofs, and fix list are yours to keep and share with auditors, insurers, or a customer, during the engagement and after it ends.
Overview
What do network penetration testing services include?
DeveloperLook provides network penetration testing services for offices, data centers, and cloud networks. We test every public IP and exposed service from outside, then run an assumed-breach test from inside, and check whether your segmentation holds. Tests start at $1,200, take 2 to 3 weeks, and you get proof for each finding, a ranked fix order, and a retest.
DEVELOPERLOOK
Project facts · Network Penetration Testing Services
- Service
- External and internal network pen tests with proof and a fix order
- Typical timeline
- 1 to 2 weeks for external, 2 to 3 weeks with internal testing
- Networks tested
- Office sites, data centers, cloud VPCs, and remote access
- Built with
- Nmap, Wireshark, Metasploit, Burp Suite, and manual testing
- Experience
- 10+ years of development experience and 1,250+ shipped projects
- Post-launch support
- 30 days of support after the report
- Communication
- Calls in US, UK, and AU business hours
- Starting price
- From $1,200 USD, fixed scope after a free scoping call
Reviewed 27 Oct 2026 by Saimul Islam
Good fit
IT teams at growing companies
You have one network admin and no security staff, and you need an outside team to prove where your network is actually exposed.
Companies after a scare
Your team clicked a phishing email, or a vendor was breached, and you want to know how far an attacker could have moved inside your network.
Teams facing a security questionnaire
Your customer or insurer asks for a recent network penetration test, and you want real proof and a report, not just a scan export.
Multi-site businesses and clinics
You run offices, a warehouse, or clinics on connected networks, and you want to know whether one weak site exposes the others.
Teams moving to the cloud
You have workloads in a cloud VPC and on-premise gear, and you want both tested together, including the links between them.
Not a fit
Web app only
You mainly need your web app, API, or store tested, not the network. Our Web Application Penetration Testing Services page is the right fit.
Hardening, not testing
You already know the gaps and want them fixed and the network hardened. Our Network Security Services page covers that work.
Wi-Fi focus
Your main worry is wireless access and rogue devices. Our Wireless Penetration Testing page targets that surface directly.
Budget under $1,200
Your budget is under $1,200, or a scheduled scan is all you need right now. A scan is a cheaper first step than a full test.
Not sure we're the right fit?
Book a free call or message us. We'll tell you honestly whether we're the right team.
Pricing
Transparent Starting Prices for Network Penetration Testing
These are starting points in USD. Your price depends on how many live hosts and sites are in scope and whether internal testing is included. You get a fixed proposal after a free scoping call.
For Agencies
White-Label Network Penetration Testing for Agencies and MSPs
You own the client relationship. We supply the network testing under your brand: scoped external and internal tests, proof for every finding, and a report your account team can present. One partner for the testing, so your MSP can offer it without building a red team in house.
How the partnership works
White label: your client only ever sees your brand
Your clientSees only your brand
You, the agencyOwn the relationship
DeveloperLookBehind your brand
Share the client
You give us the client network, scope, and the rules of engagement.
- Client needs
- You share the details
- Details received
We test and prove
We run the external and internal tests and prove each attack path.
- Scope and plan
- Proposal to resell
- Your quoteYOUR LOGO
You present results
You deliver the report and fix order under your own brand.
- Done by our team
- Your brand on it
- Handed to your clientDone
- Your client
- You, the agency
- DeveloperLook
Share the client
You give us the client network, scope, and the rules of engagement.
- Client needs
- You share the details
- Details received
We test and prove
We run the external and internal tests and prove each attack path.
- Scope and plan
- Proposal to resell
- Your quoteYOUR LOGO
You present results
You deliver the report and fix order under your own brand.
- Done by our team
- Your brand on it
- Handed to your clientDone
Partner with DeveloperLookDelivered under your brand
The Right Technology for Your Project
Technology Stack
We test with the tools network testers trust and report in formats your engineers and leadership can both act on.
- Nmap
- Wireshark
- Metasploit
Burp Suite
Python
- Active Directory
- Windows Server
- Linux
- Cisco
- Fortinet
AWS
Microsoft Azure
Google Cloud
Docker
Cloudflare
- OpenVPN
- WireGuard
- RADIUS
- SonicWall
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Related Services
Services buyers often add: the security hub, network hardening, web app testing, and a managed vulnerability program.
Web Application Penetration Testing Services
DeveloperLook offers Web Application Penetration Testing Services for stores, SaaS products, and custom apps: hands-on testing of logins, roles, checkout logic, APIs, and cloud settings, with proof for each finding, a fix list, and a retest.
Network Security Services
DeveloperLook delivers network security services for offices, clinics, and shops. We map every device, split the network into zones, clean up firewall rules, lock down admin access, and secure Wi-Fi and VPN on the hardware you already own.
Wireless Penetration Testing Services
DeveloperLook provides wireless penetration testing services for offices, warehouses, and campuses. We test your Wi-Fi from the parking lot inward, hunt for rogue access points, and prove whether your guest network really stays away from your systems.This page
Network Penetration Testing Services
Pairs with the 6 services around it
AWS and Azure Penetration Testing
DeveloperLook provides AWS penetration testing services and Azure cloud pentests that respect each provider's rules. We test your IAM, exposed services, and workloads, not the cloud itself, and prove what an attacker could reach in your account.
Penetration Testing as a Service
DeveloperLook runs penetration testing as a service for product teams on a monthly rhythm. Each cycle is scoped from what you shipped, tested by hand, and filed as tickets in your own tools, with a quarterly report for customers and auditors.
Cybersecurity Services
DeveloperLook provides cybersecurity services for businesses without a security team. We assess identity, email, devices, cloud, and web apps, fix the gaps you approve, and recheck every fix, so you get a cybersecurity service provider that does the work.FAQ
Frequently Asked Questions
Straight answers on cost, timeline, external and internal testing, and how a test differs from a scan.
Saimul IslamFounder & CEO, DeveloperLookStill have questions?
Send a message or book a call with the team.
Network penetration testing services start at $1,200 for an external test of up to two IP ranges. Adding an assumed-breach internal test and segmentation checks runs $3,000, and a multi-site or cloud and on-premise test starts at $5,900. You get a fixed quote after a free scoping call that sets the number of live hosts and sites.
An external test usually runs 1 to 2 weeks end to end, with the hands-on work in the middle. Adding internal testing takes 2 to 3 weeks. How long depends on how many live hosts and sites you have in scope. We retest once your team has applied the fixes, usually within 30 days.
Network penetration testing is an authorized attack on your network that proves which of your weaknesses are real. It goes beyond a scan: a tester works by hand to chain findings together and reach your servers, accounts, or data. It covers both external testing from the internet and internal testing from inside your network.
The goal is to show what an attacker could actually do to you, not just list your open ports. We find the real paths from a foothold to your servers, accounts, and data, then rank them by impact. You leave knowing which of your gaps matter most and the order to fix them in.
External testing attacks your public network from the internet: VPN gateways, mail servers, and exposed services. Internal testing starts from inside, as if one laptop were already compromised, and follows the paths to servers and data. External shows what a stranger reaches, and internal shows how far a foothold spreads. We run both on the full plan.
A test shows you exactly where to spend your effort. Instead of guessing, you get proof of the paths an attacker would use against you and a fix order that cuts your risk first. You can use the report to close your segmentation gaps, fix reused admin passwords, and harden remote access, then confirm the work with a retest.
A hands-on test finds what scanners miss: chained flaws, weak trust between systems, and segmentation that fails under pressure. It is effective because a human attacker thinks in paths, not single bugs. It will not catch everything forever, though, so most teams pair a yearly test with scheduled scanning and a prompt patch process.
A network audit reviews your settings and documents against a standard, mostly on paper. A penetration test proves what an attacker can do against the live network. An audit tells you a port should be closed, and a test shows that it is open and reachable. Many teams run both, since they answer different questions.
Run one at least once a year. Test again after any big change to your network, such as a new site, a cloud migration, or a firewall replacement. Teams with strict compliance needs often test more often. Between tests, scheduled vulnerability scanning catches new exposure as it appears on your network.
Because a clean scan and a firewall do not prove your network is safe. One phished laptop can reach far if your segmentation is weak or your admin passwords are shared. A test shows you that risk before an attacker does, with proof. Your report also answers many customer questionnaires, insurers, and compliance needs that ask for a recent test.
Saimul IslamFounder & CEO, DeveloperLookStill have questions?
Send a message or book a call with the team.
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