Hire the best Network Security Engineers

Check out Network Security Engineers with the skills you need for your next job.

Clients rate Network Security Engineers
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based on 3,225 client reviews
Abdelrahman R.
$100/hr
  • Trophy Icon Network Security
  • Cloud Engineering
  • Google Workspace Administration
  • Email Support
  • macOS
  • Autopilot
  • Microsoft Azure
  • Microsoft Endpoint Manager
  • Email Security
  • Microsoft Exchange Online
  • Mobile Device Management
  • System Administration
  • Tech & IT
  • Email Communication
  • VPN
  • Server Virtualization

Do you want a quick and professional IT support? Then let's read what my previous Upwork clients had said about me: "Abdu was awesome. Extremely patient, great communication and really knows his stuff. Will be working together again for sure :)" "With AbdelRahman, all work is done with no supervision !! Great professional !" "Best freelancer on Upwork, hands down. Very very skilled, always available, great at communicating and very friendly. I highly recommend you to hire Reda! Don't look any further, he is definitely your guy! 10/10" "Abdu is a highly skilled, patient and friendly freelancer. He helped to get rid off the most stubborn...

James T.
$225/hr
  • Trophy Icon Network Security
  • Linux System Administration
  • Windows Administration
  • Virtualization
  • Web Hosting
  • Email Design
  • Network Design
  • Network Monitoring
  • Network Planning
  • Network Administration
  • System Installation & Upgrades
  • Network Engineering
  • Docker
  • NGINX
  • System Monitoring

Hey, I'm James. I've been a self-employed business network and server admin for 21+ years. I've worked with all flavors of Linux and Windows for some of the best businesses in the country. My average customer that I've worked with has been with me over 10 years. I specialize in analyzing current infrastructure and determining the needs of my clients then providing a written plan to correct any issues and protect the business systems from hackers and cryptolockers. In one of my recent projects, I consulted with a six billion dollar, publicly traded company to completely redesign their infrastructure to have redundant firewalls, VMWare...

Bhakti V.
$30/hr
  • Trophy Icon Network Security
  • Information Security
  • Project Risk Management
  • PCI
  • Disaster Recovery
  • Technical Writing
  • Policy Writing
  • Cloud Security
  • ISO 27001
  • Editing & Proofreading
  • Website Copywriting
  • Blockchain
  • Artificial Intelligence
  • Amazon Web Services
  • Robotics

With a degree in Computer Engineering and a passion for writing, my experience spans across writing whitepapers, blogs, research reports, content for websites, thesis for academic submissions, sales pitch, business proposals and more. I am highly organized and schedule my time to get things accomplished accordingly. I am detail-oriented and an excellent researcher. I can be entrusted with big projects as I prefer to complete my work before deadlines giving you ample time to review my work and provide feedback. I take pride in my work

Ratko B.
$38/hr
  • Trophy Icon Network Security
  • Linux System Administration
  • Network Administration
  • Internet Security
  • Firewall
  • CentOS
  • Unix System Administration
  • Apache Administration
  • Zimbra Administration
  • Red Hat Administration
  • Let's Encrypt
  • Ubuntu
  • SSL
  • System Administration
  • Cloudflare

I have 30-years experience in network projects including design, implementation, system administration and in software development. For the first 5 years of my career I worked on software development: coding and especially testing. For the last 25 years I'm working on implementation and maintenance of University of Nis WAN. Last 20 years I'm deeply involved in AMRES (Academic Network of Serbia) project. Don't fix it if it ain't broken, don't break it if you can't fix it! SKILLS SUMMARY - Any system administration tasks - Operating Systems: any *nix (Linux, FreeBSD, SGI IRIX, SCO, Solaris, OSX), Windows 3.1/9x/Me/XP/Vista/W7/W8/W10,...

Marcelo V.
$75/hr
  • Trophy Icon Network Security
  • VMware vSphere
  • Fortinet Technologies
  • Network Administration
  • Cisco UCS
  • DNS
  • Active Directory
  • LAN Implementation
  • Virtual LAN
  • Fortinet

Active Certifications: - Fortinet NSE 4 - VMWare VCP 5 Working on certifications: - Fortinet NSE 5 - Fortianalyzer - Fortinet NSE 5 - FortiEMS I'm a Datacenter/Network administrator available for any kind of IT infrastructure/operation project. My background is from Telecom Engineering, but I'm a "man with many hats" and I've been working in IT for the past 20 years. I have many years of experience in installation, configuration and troubleshooting virtualization solutions using VMware products, cloud solutions/migrations based on Microsoft Office 365 and security implementations using Fortigate. Recently I've been dedicating my work to...

George J.
$50/hr
  • Trophy Icon Network Security
  • Unix System Administration
  • Linux System Administration
  • Penetration Testing
  • Vulnerability Assessment
  • Windows Administration
  • VMware Administration
  • VMware ESX Server
  • CentOS
  • Red Hat Administration

I have extensive experience in many areas across the entire IT spectrum. I have hands-on experience with virtual technologies including VMWare ESX/VSphere, VMWare View, and Virtual Box. Server OS admin experience with Linux (various), Solaris 8/9/10, HP/UX 11, AIX 5.0/5.3, Windows server/desktop, FreeBSD (various versions), and OpenBSD. I am proficient in Network Security, specializing in end-to-end incident investigation Also quite proficient in audio engineering and production/composition in various Dance and Hip Hop generes of music.

Gregory S.
$120/hr
  • Trophy Icon Network Security
  • Network Design
  • Cisco Certified Network Associate
  • Fortinet
  • Extreme Networks
  • Google Cloud Platform
  • Network Engineering
  • Wireless Communication
  • Ubiquiti
  • F5, Inc.

I specialize in building, designing and troubleshooting network infrastructure and transport. Wired, Wireless, LAN, WAN, VPN and Security solutions to fit your business needs. I have been employed as a Network Engineer for Snapchat, Fortinet, Nuance Communications, Port of Seattle, Infospace, and Costco Wholesale. As a consultant I have worked on network and firewall projects as part of the AT&T consulting team for the State of Texas, New York Yankees and HP Enterprise. As a Professional Services Engineer for Fortinet, I deployed hundreds of Fortinet appliances for a large-scale IPSec VPN deployment for the State of Washington. Vendor...

Leo S.
$90/hr
  • Trophy Icon Network Security
  • WordPress
  • Linux System Administration
  • Amazon Web Services
  • Web Hosting
  • LAMP Administration
  • WebHost Manager (WHM)
  • cPanel
  • DigitalOcean
  • SSL
  • DNS
  • MySQL
  • Web Host Manager

I'm a stay at home dad who watches over his newborn daughter and runs a small business that focuses on WordPress. On a daily basis I assist my clients with database issues, CSS edits, HTML edits, PHP tweaks, malware, backups, optimization, migrations, troubleshooting, updates, and a plethora of other technical issues that arise with hosting. I can basically adapt to anything WordPress related. I also have 15 years of professional experience with various Linux distros, 8 of those years I worked as a professional Linux admin in the Hosting industry with various Web Hosts, which has given me proficiency with the LAMP stack, LEMP stack, DNS,...

Stuart G.
$55/hr
  • Trophy Icon Network Security
  • DigitalOcean
  • Shopify
  • Virtualization
  • Ecommerce Platform Development
  • cPanel
  • Microsoft Azure
  • Google Cloud Platform
  • Windows Administration
  • Disaster Recovery
  • Ubuntu
  • Scripting
  • WordPress
  • Unix System Administration
  • Linux System Administration
  • System Hardening

My name is Stuart Gray. I am a network and systems engineer by trade and a network security researcher by hobby. At 36 years old, I have over 17 years of experience as a professional in the network security industry. I started playing with computers and networks sometime around 10 or 11 years old, and I have never stopped. At 16 years old, I launched a small hosting company. At 19, I was hired by Internet Security Systems (Creators of BlackICE Defender) to work in their X-Force Advanced Research and Development team. Two years later, they were acquired by IBM. I continued to work for IBM for 6 more years as a software developer...

Petar A.
$75/hr
  • Trophy Icon Network Security
  • Penetration Testing
  • Internet Security
  • Web App Penetration Testing
  • Vulnerability Assessment
  • Malware
  • Network Penetration Testing
  • Ethical Hacking
  • Security Testing
  • Black Box Testing
  • Reverse Engineering
  • JavaScript
  • Web Application Security

✅ Top Rated Expert ✅ 3000+ Hours ✅ Professional Penetration Tester Security researcher acknowledged by U.S Department of Defense (among other notable companies like AT&T, Semrush, Smule etc) for disclosing a number of vulnerabilities on DoDs systems via Hackerone bug bounty platform. For deliverables, professional reports are created,that will outline every vulnerability found, proofs-of-concept, and solutions on how to fix the discovered vulnerabilities. Each report not only meets but exceeds requirements for compliance auditors. Core competency is performing black and gray box testing on live web applications/networks or lab...

Aty P.
$50/hr
  • Trophy Icon Network Security
  • PHP
  • API
  • Virus Removal
  • MySQL
  • Penetration Testing
  • WordPress Malware Removal
  • Internet Security
  • Mail Server Implementation
  • Web Application Security
  • WordPress Plugin
  • Linux System Administration
  • Website Security
  • Network Administration
  • Web Hosting

Hello, Thank you for considering my profile. My name is Aty and I am an experienced Linux Server Administrator, Web Security Expert, PHP Developer, WordPress Developer and Designer, as well as a specialist in database optimization and consulting. I have been working in these fields for 14+ years and am well-versed in Agile methodology. Throughout my career, I have led multi-functional teams on mission-critical projects, starting with working at large design firms for 2-3 years before assembling a team of highly skilled professionals to take on assignments. My team includes architects to ensure a suitable platform, analysts to document...

Emanuel P.
$30/hr
  • Trophy Icon Network Security
  • Certified Information Systems Security Professional
  • Penetration Testing
  • Vulnerability Assessment
  • Website Security
  • Web Application Security
  • Information Security
  • Open Web Application Security Project
  • Security Testing
  • Information Security Audit

Looking for a penetration test? We'll give you access to our next-generation penetration testing solution. By combining the power of manual and automated penetration tests, we deliver the real-time insights companies need to remediate risk quickly. Through our Pentest as a Service (PTaaS) platform our clients receive comprehensive assessments. Our methodology follows the National Institute of Standards and Technology Special Publication (NIST SP​ 800-115), along with the latest techniques, tactics and tools used by hackers to compromise systems and applications. Providing real-time findings and unlimited retests to ensure gaps are closed is...

Jonathan T.
$95/hr
  • Trophy Icon Network Security
  • Certified Information Systems Security Professional
  • Network Engineering
  • Systems Engineering
  • VMware vSphere
  • Microsoft Windows Powershell
  • Microsoft Exchange Server
  • Storage Area Network
  • Fortinet Technologies
  • Policy Development
  • Compliance
  • Network Planning
  • Network Monitoring
  • Network Administration
  • Network Security Management

Information Security and Infrastructure professional with over 15 years of experience. I have passion and talent for aligning architecture, plans, controls, processes, policies and procedures with organizational goals and security standards. Examples of previous projects and samples of documentation can be provided upon request. Certifications: - CISSP - C|EH Strengths: - Attention to detail - Planning - Knowledge in multiple areas of IT Skills: - Cybersecurity - Compliance (SOC 2, PCI, NIST/FISMA) - Microsoft products including Windows Server (2000 - 2019) Exchange Server (2010 - 2019) Active Directory (ADDS, DNS, Group Policy, etc.)...

Robert Son H.
$20/hr
  • Trophy Icon Network Security
  • Linux System Administration
  • Windows Administration
  • Network Administration
  • Security Infrastructure
  • DNS
  • Google Cloud Platform
  • Network Monitoring
  • Email Security
  • DevOps
  • Proxmox VE
  • Amazon
  • VPN
  • Docker
  • Docker Swarm Mode

I've been working with IT for 11 years, initially working with computer maintenance, printers and small local network configuration. Later, I worked with remote and inloco support, basic and applied computer training for all ages. Nowadays, I am focused on servers, mostly Linux, but I support the Windows and AIX platform. I am also a network administrator, working from the physical layer to its final configuration and troubleshooting, on all network services.

Alex F.
$35/hr
  • Trophy Icon Network Security
  • Internet Security
  • Wireless Security
  • Security Analysis
  • Information Security
  • Windows Administration
  • Linux System Administration
  • AWS Systems Manager
  • Security Engineering
  • Security Infrastructure

I'm a Security Specialist, with +15 yr of experience in the security field and +20 yr in system administration (Linux, AIX, BSD and Windows) on banking, education and R&D sectors. Feel free to get in touch if you need: * Security infrastructure administration or advice * Security Audit & Pentesting * Linux/Windows/AIX system administration or server troubleshooting and LAMP/LEMP stack deployments and fine tunning. I will be glad to collaborate in any interesting project.

ezra h.
$89/hr
  • Trophy Icon Network Security
  • Data Backup
  • Unix
  • Virtualization
  • Bash
  • Network Administration
  • Docker
  • Linux System Administration
  • Network Design
  • Linux
  • Raspberry Pi
  • System Administration
  • DevOps
  • Network Engineering
  • Unix Shell

I have over 9 years experience with Linux, network engineering & administration, system engineering & administration, Dev ops, virtualization. Mainly working on building tailor-made hardware/software combinations to accommodate customer requirements in any IT related area. * Custom automation scripts * Rapid Prototyping * Cloud storage (Nextcloud/ownCloud, I helped develop and maintain the official Nextcloud VM) * Virtual machines * Containers Docker/LXC * Linux servers * Raspberrypi's with custom build firmware * IOT Internet Of Things * Tweaking performance and security. * Custom network builds for "Home Lab" or corporate...

Manuel Antonio O.
$75/hr
  • Trophy Icon Network Security
  • Network Engineering
  • Technical Support
  • Spanish
  • Cisco
  • Cisco Meraki
  • Firewall
  • Palo Alto Firewalls
  • Cisco Certified Internetwork Expert
  • Cisco Certified Network Associate
  • Cisco Certified Network Professional
  • Amazon
  • Network Administration
  • PfSense
  • MikroTik

I am a Network Engineer with 8+ years of experience in Cisco Enterprise Networking Solutions, Network Security and Cloud solutions. I have worked with projects planning, design, deployment, configuration and troubleshooting of large scale networks. ►Strong knowledge of Networking best practices, including OSI model, TCP/IP and network hardening security. ►Experience with Layer 3 routing protocols, including EIGRP, OSPF, BGP and the OSI model in general. ►Experience with software defined networking solutions Cisco SDWAN Viptela and Cisco SDA. ►Experience with multiple vendors in Enterprise networking Solutions such as Cisco, Cisco Viptela,...

Manmeet S.
$100/hr
  • Trophy Icon Network Security
  • Cisco Meraki
  • Windows Administration
  • Email Deliverability
  • Computer Network
  • Sophos Sophos UTM
  • Cisco Certified Network Associate
  • Microsoft Sharepoint
  • Microsoft Azure
  • VMware ESX Server
  • Windows Server
  • Microsoft Server

I am working as a Senior Network/System Engineer in a MSP. I am responsible for managing IT infrastructure for different types of businesses. I have 6 years of academic experience in Information technology, including Bachelors of Technology in Information Technology, and about 8 years of professional experience in working with Microsoft Servers and different vendors devices in Network Infrastructure. I am looking for some freelance work to develop my skills and increase my experience and build a great professional relationships. I can install and configure IT infrastructure for small to medium-size businesses. I have worked on various...

Ramsey B.
$125/hr
  • Trophy Icon Network Security
  • Server Virtualization
  • Security Engineering
  • VMware Administration
  • Information Security
  • Microsoft Active Directory
  • DNS
  • Microsoft Azure
  • Infrastructure Management
  • Network Design
  • Systems Engineering
  • Amazon Web Services
  • Cloud Engineering Consultation
  • Solution Architecture
  • Cybersecurity Management

ESXi/vSphere, AWS architecture and implementation, DevSec(Ops), SDN, Windows/Linux systems administration, root-cause analysis on infrastructure including networks, enterprise endpoint product test and eval, test case builds. Throughout my 13 years I've seen and touched almost everything. Very efficient and thorough.

Prabitra B.
$30/hr
  • Trophy Icon Network Security
  • Network Administration
  • Cisco Certified Network Professional
  • Cisco ASA
  • VPN
  • Firewall
  • Cisco Router
  • Check Point
  • Cisco Meraki
  • Load Balancing
  • Fortinet Technologies
  • Ubiquiti
  • Network Security Management
  • Web Proxy
  • Fortinet

CCSE, ITILv3 , Fortinet NSE4 CCNP R&S,CCNP Security. In the last 12 years, I have been working on various network products and have gained comprehensive experience in Cisco, Fortinet, Sonicwall, Checkpoint, HP, F5, Radware technologies. I have been involved in the design, configuration, and troubleshooting of Network products. Firewalls: Cisco ASA 5500 Series Cisco ASA 5500-X Series Cisco RV Series Cisco Firepower 2100Series Cisco Firepower 4100Series Fortigate 50E Fortigate 60E Fortigate 90E Fortigate 800C Fortigate 100E Fortigate 3OOE Fortigate 800D FortiGate 1500D Checkpoint 4000 Appliance Checkpoint 5800 Appliance Checkpoint...

Soufiane H.
$75/hr
  • Trophy Icon Network Security
  • AWS Lambda
  • AWS Systems Manager
  • Firewall
  • Web Application Security
  • Cybersecurity Management
  • Cisco ASA
  • Cisco Router
  • Python
  • Digital Forensics
  • Application Security
  • Information Security
  • Security Infrastructure

Master in IT 6 years of experience in cybersecurity, DevOps, and networking. I hold several professional certifications from Cisco, Offensive Security and AWS. Cisco CCNA routing and switching CCNA Security CCNP security CCNA Cyber ops AWS: AWS Certified Solution Architect EC-Council: Certified Ethical Hacker Offensive Security: OSCP OSWE

Robert S.
$55/hr
  • Trophy Icon Network Security
  • Fortinet
  • FortiGate Firewall
  • Check Point
  • Palo Alto Firewalls
  • Network Architecture
  • Cloudflare
  • Cloud Security

Strongly motivated network security expert with extensive experience of designing, implemeneting, troubleshooting and documenting complex security architectrures in multiple projects having global scale at companies such as Cisco, Capgemini. Eager to share knowledge and discuss IT and networking technologies with others. Keen on broadening knowledge about network and cloud security. Experienced with vedors/devices: ● Routing: Cisco ASR, Cisco ISR, MikroTik, Cisco Nexus ● Switching: Cisco Nexus, Cisco Catalyst, Juniper, FortiSwitch ● Security: FortiGate, FortiManager, FortiAnalyzer, FortiAuthenticator, Palo Alto, Checkpoint, Cisco ASA, Cisco...

Jennifer M.
$175/hr
  • Trophy Icon Network Security
  • C#
  • Content Writing
  • Technical Editing
  • Copywriting
  • Content Management
  • Marketing
  • Cloud Security
  • Technical Documentation
  • SaaS
  • Information Security
  • Technical Writing
  • Cybersecurity Tool
  • Search Engine Optimization
  • SaaS Development

I'm a software engineer who writes marketable and revenue-impacting technical content for companies such as Microsoft, Adobe, Rackspace and IBM. I've helped numerous cybersecurity companies, software developers, B2B businesses, SaaS developers, API developers, and other technical organizations improve their search engine rank and generate revenue from my content. I was a developer for 15 years, so I understand your audience and how to "speak" to technical people. Because I understand your industry, I can also write engaging content for people who are not quite as technical (e.g., C-level executives, CTOs, CIOs, etc.). My goal is to engage...

Brandon B.
$75/hr
  • Trophy Icon Network Security
  • VMware Administration
  • Microsoft Server
  • Storage Area Network
  • Backup Administration
  • Information Security
  • Server
  • Virtualization
  • Troubleshooting
  • Active Directory
  • Veeam
  • Windows Administration
  • Microsoft Windows
  • System Administration
  • Network Administration
  • VMware ESX Server

I am a multi-talented IT professional who brings 15 years of experience to all areas of IT Infrastructure & Security. I'm a Master's degree holder and have 15+ IT certifications across many different technologies. I have held positions from Desktop/Phone Support, Systems Engineer/Administrator, Senior Technical Support Engineer for an Enterprise Technology Company to a "Hands On" IT Infrastructure Manager with overall responsibility for its multi-million dollar IT Infrastructure services. My excellent work ethic and wide range of experience ("jack of all trades") is what separates me from many others that work in IT. I have experience...

Sameh A.
$130/hr
  • Trophy Icon Network Security
  • Security Infrastructure
  • Cloud Computing
  • Compliance Consultation
  • Technical Project Management
  • IT Compliance Audit
  • HIPAA
  • Linux System Administration
  • ISO 27001
  • Information Security
  • HITRUST Common Security Framework
  • Penetration Testing
  • Security Policies & Procedures Documentation
  • Information Security Audit
  • Vulnerability Assessment

I have a very good experience in information security and worked with enterprise companies during my career in many positions and roles. CISSP CISA PMP MCSE RHCT ISO 27001 Symantec Juniper Cisco Trend Micro Websense DLP(ForcePoint, Symantec), IDP IDS SSL/VPN FW, AWS, Azure, HITRUST, HIPAA, GDPR, CISA

Daniel W.
$40/hr
  • Trophy Icon Network Security
  • Linux System Administration
  • Windows Administration
  • WordPress
  • Internet Security
  • Vulnerability Assessment
  • Virtualization
  • Storage Area Network
  • VMware ESX Server
  • Azure
  • AWS Systems Manager

I have 20+ years of experience in implementing and troubleshooting various Linux and Windows services. Over the past five years, I have specialised in building and managing cloud solutions on AWS & Azure. I also specialise in IT security, providing IT security assessments and recommending/implementing ways in which businesses can secure their systems effectively. Key Skills: Windows Server OS up to 2019 Linux (RedHat/CentOS & Ubuntu/Debian ) AWS / Azure / DigitalOcean Azure Devops IT Security Audits Docker Virtualisation - VMware / Hyper-V / KVM Exchange / Office 365 Scripting in Powershell, Python,...

Carmen M.
$60/hr
  • Trophy Icon Network Security
  • Ethical Hacking
  • WordPress
  • Nessus
  • Penetration Testing
  • Cybersecurity Management
  • Microsoft Azure
  • Information Security
  • Office 365
  • Vulnerability Assessment
  • Cloud Security
  • ISO 27001
  • Blockchain
  • Amazon EC2
  • Mobile App Testing

HI!! I am Virtual CISO, Cyber Security, Cyber defense, Ethical Hacker, expert I am a computer security scientist with an intensive hacking background. I do have a Msc in computer engineering I am working for severals Internationals Enterprises where I do intensive researches in Penetration Testing, Vulnerability managements, Technological Risk, Security Architecture and Forensic I am Professional with over 20 years experience in the area of information and communications technology, including 15 years of experience in networks and security infrastructure Analytical skills to solve problems, ability to work with new technologies,...

$NaN/hr

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Inside IT Security: How to Protect Your Network from Every Angle

Network security. Cyber security. Endpoint security. These different, often overlapping arms of IT security can get confusing. As hackers get smarter, it’s increasingly important to know what each does and how to implement them into your own network.

In the wake of the highly-connected Internet of Things (IoT) and the rise of the cloud, we’re facing increased vulnerabilities to our networks—networks that are less monolithic, legacy architectures and more distributed, microservice-based networks. With large-scale data breaches making headlines, whether you’re a small startup or an enterprise organization, security should be a top priority.

In this article, we’ll explore the different types of IT security and what technologies and methods are used to secure each so you can arm your network with the people and plans you need to have excellent lines of defense in place and keep attacks at bay.

The IT security chain

Why are there so many types of IT security? The more links in a network’s chain, the more opportunities for hackers to find their way in. Each component requires its own subsequent security measures—with many of them overlapping and working in tandem, much like the actual components of a network do.

It’s also important to note that with security, there’s no one-size-fits-all approach. Every network is different and requires skilled professionals to create tailored plans across all fronts: apps, databases, network devices, cloud servers, IT infrastructures, and the often weakest link in the security chain: users. These security plans are living, breathing things that need to be updated, upgraded, and patched on a constant basis, too.

Let’s start broad and work our way into narrower fields of security.

It all boils down to information: information security, IT security, and information assurance

Information security and information technology (IT) security sound similar, and are often used interchangeably, but they’re slightly different fields. When we’re talking about information security (or infosec), we’re actually referring to protecting our data—whether that’s physical or digital. IT security is a bit more specific in that it’s only referring to digital information security.

IT security pretty much covers all of the types of security within a network, from components like databases and cloud servers to applications and the users remotely accessing the network. They all fall under the IT security umbrella.

Within this is another term to know: information assurance. This means that any important data won’t be lost or stolen in the event of an attack or a disaster—whether that’s a tornado wiping out a server center or hackers breaking into a database. It’s commonly addressed with things like backups and offsite backup databases and rests on three main pillars: confidentiality, integrity, and availability (CIA). These philosophies carry over into every other aspect of security, whether it’s application security or wireless security.

IT security experts (also, system administrators and network admins, which we’ll talk about next) are one of the most important team members you can hire. They’re responsible for the safety and security of all of a company’s hardware, software, and assets, and regularly audit back-end systems to ensure they’re airtight. Through security analysis, they can identify potential security problems and create “protect, detect, and react” security plans.

Network security: the best defenses

Network security is anything you do to protect your network, both hardware and software. Network administrators (or system administrators) are responsible for making sure the usability, reliability, and integrity of your network remains intact. A hacker is capable of getting into a network and blocking your access, for example by holding a system hostage for a bitcoin ransom. You need an excellent defense in place to ensure you’re protected.

Detecting weaknesses in a network can be achieved through:

Security engineering: the practice of protecting against these threats by building networks to be safe, dependable, and secure against malicious attacks. Security engineers design systems from the ground up, protecting the right things in the right ways. If a software engineer’s goal is to ensure things do happen (click here, and this happens), a security engineer’s goal is to ensure things don’t happen by designing, implementing, and testing complete and secure systems.

As a part of security engineering, there are proactive measures to predict where vulnerabilities might lie and reinforce them before they’re hacked:

  • Vulnerability assessment: Engineers identify the worst case scenarios and set up proactive plans. With security analysis software, vulnerabilities in a computer, network, or communications infrastructure are identified and addressed.
  • Penetration testing: This entails deliberately probing a network or system for weaknesses.
  • Network intrusion detection systems (NIDS): This type of software monitors a system for suspicious or malicious activity.

Network admins are able to target threats (whether through suspicious activity or large queries to a database), then halt those attacks, whether they’re passive (port scanning) or active, like:

  • Zero-day attacks, also called zero-hour attacks—attacks on software vulnerabilities that often occur before the software vendor is aware of it and can offer a patch. Or, hackers will initiate attacks on the software vulnerability the day that it’s made public there’s an issue, before users can install patches (hence the name “zero day”)
  • Denial of service attacks
  • Data interception and theft
  • Identity theft
  • SQL injection

Other methods of protecting networks include:

  • IT Security frameworks: These act like blueprints for a company to set up processes and policies for managing security in an enterprise setting. Which a company uses can depend on the industry and compliance requirements. COBIT is popular among larger, publicly traded companies, ISO 27000 Series is a broad set of standards that can be applied to a number of industries, and NIST’s SP 800 Series is used in government industries, but can be applied elsewhere.
  • Password “salt and peppering”: Adding salt, or random data, to a password makes common passwords less common. A pepper is also a random value attached to the password, which is helpful in slowing hackers down.
  • Authorization, authentication, and two-factor authentication (sometimes sent via SMS, although this can prove vulnerable as well)
  • Virtual Private Networks (VPNs)
    • Application whitelisting, which prevents unauthorized apps from running on a computer
    • Firewalls: Block unauthorized access to a network or data interceptions
    • Honeypots: These are like decoy databases that attract hackers but don’t house any important information.
  • Anti-virus software
  • Encryption—decoding data, in transit or at rest, including end-to-end encryption often used in messaging apps and platforms that only allows encrypted messages to be read by sender and receiver

Within network security is also content security, which involves strategies to protect sensitive information on the network to avoid legal or confidentiality concerns, or to keep it from being stolen or reproduced illegally. Content security largely depends on what information your business deals in.

Endpoint security: securing the weakest link

It’s said that users are often the weakest link in the security chain, whether it’s because they’re not properly educated about phishing campaigns, mistakenly give credentials to unauthorized users, download malware (malicious software), or use weak passwords. That’s why endpoint security is so crucial—it protects you from the outside in.

Endpoint security technology is all about securing the data at the place where it both enters and leaves the network. It’s a device-level approach to network protection that requires any device remotely accessing a corporate network to be authorized, or it will be blocked from accessing the network. Whether it’s a smartphone, PC, a wireless point-of-sale, or a laptop, every device accessing the network is a potential entry point for an outside threat. Endpoint security sets policies to prevent attacks, and endpoint security software enforces these policies.

If you’ve ever accessed a network through a virtual private network (VPN), you’ve seen endpoint security in action. Malware is one of the core threats addressed by endpoint security, including remote access trojans (RATs), which can hack into a laptop and allow hackers to watch you through your webcam.

Internet security: guarding against cyber crimes

The internet itself is considered an unsecured network—a scary truth when we realize it’s essentially the backbone for how we give and receive information. That’s where internet security (or cyber security consulting) comes in, and it’s a term that can get pretty broad, as well. This branch of security is technically a part of computer security that deals specifically with the way information is sent and received in browsers. It’s also related to network security and how networks interact with web-based applications.

To protect us against unwittingly sharing our private information all over the web, there are different standards and protocols for how information is sent over the internet. There are ways to block intrusions with firewalls, anti-malware, and anti-spyware—anything designed to monitor incoming internet traffic for unwanted traffic or malware like spyware, adware, or Trojans. If these measures don’t stop hackers from getting through, encryption can make it harder for them to do much with your data by encoding it in a way that only authorized users can decrypt, whether that data is in transit between computers, browsers, and websites, or at rest on servers and databases.

To create secure communication channels, internet security pros can implement TCP/IP protocols (with cryptography measures woven in), and encryption protocols like a Secure Sockets Layer (SSL), or a Transport Layer Security (TLS).

Other things to have in an internet security arsenal include:

  • Forms of email security
  • SSL certificates
  • WebSockets
  • HTTPS (encrypted transfer protocols)
  • OAuth 2.0, a leading authorization security technology
  • Security tokens
  • Security software suites, anti-malware, and password managers
  • Frequently updating and installing security updates to software, e.g., Adobe Flash Player updates
  • Encryption, and end-to-end encryption

Cloud security: protecting data that’s here, there, and everywhere

Much of what we do over the web now is cloud-based. We have cloud-based servers, email, data storage, applications, and computing, which means all of the communication between onsite and the cloud needs to be secure, too. With all of this connectivity and the flowing of (sometimes sensitive) information comes new concerns with privacy and reliability—and the cloud can be notoriously vulnerable. This has given way to a new subdomain of security policies: cloud computing security.

Computer security, network security, and information security as a whole all need to be optimized for the cloud. For businesses that use public clouds, private clouds, or a hybrid cloud—information is getting exchanged between the two regularly and needs to be protected.

Building a cloud security framework involves creating a strategic framework for how all operations will happen in a cloud environment, managing access, protecting data, and more.

Application security: coding apps to be safe from the ground up

A lot of the internet security focus is on patching vulnerabilities in web browsers and operating systems, but don’t neglect application security—a majority of internet-based vulnerabilities come from applications. By coding applications to be more secure from the start, you’re adding a more granular layer of protection to your internet and network security efforts, and saving yourself a lot of time and money.

App security does rest on top of many of the types of security mentioned above, but it also stands on its own because it’s specifically concerned with eliminating gaps and vulnerabilities in software at the design, development, and deployment stages. Security testing (which should be conducted throughout the code’s lifecycle) digs through the app’s code for vulnerabilities, and can be automated during your software development cycle.

Choosing a language, framework, and platform with extra security fortifications built in is paramount, too. For example, Microsoft’s .NET framework has a lot of built-in security, and the Python Django-style Playdoh platform addresses application security risks. Rising in popularity is the Spring Security framework, a Java framework known for excellent built-in authentication and authorization measures, and the PHP framework Yii prioritizes security, as well.

Aside from framework choice, there are a few strategies to bolster application security, including:

  • Ensuring TLS
  • Authentication and authorization measures
  • Data encryption
  • Sandboxing applications
  • Secure API access
  • Session handling

Not sure where to start? Enlist the help of a network security freelancer today

By adopting a proactive security stance, educating your users, and taking advantage of the latest in authentication measures, you’ll be better able to prevent, detect, and strengthen your company against attacks. However, it’s important to remember that securing your network isn’t a one-time thing—it’s an ongoing process that needs to be constantly occurring and evolving along with your website and organization to ensure you’re protected in the face of the ever-changing landscape of security threats. Luckily, there are plenty of security experts with a variety of specialties on Upwork you can hire to help assess your network for vulnerabilities and create a custom security plan—browse network security freelancers today to get started. You can also utilize IT services on Upwork that matches you with proven IT talent.

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