What is a VPN? Understanding VPNs and Their Benefits
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Between the rise in cyber attacks on companies, malware directed at individual users, and unscrupulous data farmers looking to profit on your browsing history, there’s a lot to watch out for in the digital environment. VPNs add a crucial security layer to your online activities that can protect sensitive information, making them ideal for businesses with a remote or hybrid workforce or those who want more security for their personal data.
What Does a VPN Do?
A VPN creates a securely encrypted “tunnel” between user devices and networks. Here are several key aspects to understanding what a VPN does:
- Encrypting data: All information traveling between devices connected via VPN is scrambled using advanced encryption algorithms, rendering it unreadable to prying eyes.
- Masking IP addresses: A VPN can hide your location by routing your network traffic through a VPN server with a unique IP address.
- Protecting against cyber threats: The encrypted nature of a VPN tunnel means hackers can’t access your data as it traverses the internet.
- Bypassing geographical restrictions: VPNs allow users to access regionally restricted content by connecting with a server in a different country.
Encryption, anonymization, and unrestricted access make VPNs powerful tools for protecting private information, enhancing online security and ensuring connectivity for personal and business use.
How Does a VPN Work?
VPNs direct your network traffic through an encryption tunnel to a remote server, then forward your traffic to its destination. Here’s a quick look at how they work:
- Connection establishment: When you activate a VPN, your device connects to a server operated by the VPN provider, creating a secure connection for your network or internet traffic.
- Data encryption: VPN client software encrypts data before it leaves your device by applying advanced encryption algorithms, transforming readable data into gibberish unreadable by outside observers.
- Tunnel creation: The encrypted data now travels through a tunnel, a secure pathway created by the VPN software, protecting it from interception or being read as it moves across the public internet.
- Server processing: When the VPN server receives your data, it decrypts and forwards it to its intended destination (like your office network or a website). When data is returned, the server encrypts it before redirecting it back through the tunnel to your device.
This process takes place in a matter of milliseconds, ensuring your experience remains seamless despite the added security.
VPN Protocols
VPN protocols are the sets of rules that determine how data is securely transmitted between your device and the VPN server. Each protocol has a different balance between speed, security and compatibility.
- OpenVPN: The modern gold standard for security, OpenVPN uses AES-256 encryption and supports TCP and UDP transmission. Ideal for sensitive business applications, OpenVPN offers high speeds and the highest available level of security.
- WireGuard: Maintaining similar security levels to OpenVPN, WireGuard achieves faster connection speeds thanks to its lightweight code and modern cryptography standards.
- IKEv2/IPSec: Primarily used for mobile device connections due to its ability to quickly reestablish connections when switching between networks (like from a G4 cellular network to coffee shop Wi-Fi). IKEv2 provides mid-grade security and speed and has native support for most mobile operating systems.
- L2TP/IPSec: Includes double encapsulation (see next section), providing extra security but bringing with it slower connection speeds. L2TP is widely compatible but less commonly found in modern implementations.
The protocol used impacts the overall performance of your VPN, with newer options like WireGuard and OpenVPN generally providing the best mix of speed and security for most business applications.
VPN Tunneling and Encryption
Think of using a VPN tunnel as comparable to sending a locked and armored envelope through the mail. Even if someone intercepts it, they can’t read the contents without the key to unlock the envelope.
There are several stages involved in creating a VPN tunnel, each providing another layer of protection against brute force attack methods:
- Encapsulation: Your data is wrapped in secure headers and passed through an encryption algorithm, ideally the military-grade AES-256.
- Secure transmission: The encrypted data packets travel through the public internet inside their shell, appearing meaningless to anyone watching your network traffic.
- Decryption: When your data reaches the VPN server, it is decrypted using a key uniquely matched to the securely locked envelope.
Benefits of Using a VPN
Enhanced Privacy and Security
VPNs safeguard sensitive data by scrambling all transmitted packets, rendering them unreadable to unauthorized viewers. Some key protections this provides are:
- Cyber attack prevention: VPNs prevent man-in-the-middle attacks, a crucial protection for businesses handling customer information, financial data, or proprietary communications.
- ISP tracking prevention: Using a VPN prevents tracking and data collection by routing encrypted data through secure servers.
- Public Wi-Fi security: VPN tunnels protect sensitive data when working from a coffee shop or airport lounge.
For enterprises, the security enhancements brought by a VPN integrate seamlessly with comprehensive cybersecurity strategies, including Secure Access Service Edge (SASE) solutions, to provide multi-layer network protection.
Secure Remote Access
VPNs enable employees to connect securely to corporate networks from anywhere in the world, addressing the security needs of today’s remote and hybrid workforce. Additional benefits of secure remote access include:
- Flexible work arrangements: Employees can work remotely without compromising productivity or security.
- Cost-effective security: Compared to similarly secure firewalls or complex multi-step security protocols, VPNs give you enterprise-grade security at a fraction of the cost.
- Regulatory compliance: VPNs maintain data integrity and provide audit trails for businesses in highly-regulated industries.
- Infrastructure scalability: Grow with your business and accommodate new users and locations without requiring new physical infrastructure.
Modern remote access solutions, such as VPNs, integrate with other managed services, like SD-WAN, to provide optimized performance and centralized management for distributed workforces without compromising security or operational efficiency.
Accessing Global Content
VPNs effectively eliminate geographical restrictions that can limit business operations, especially if your employees require access to region-specific content. Other advantages of global access include:
- International collaboration
- Market research
- Compliance requirements
- Content availability
These capabilities allow businesses to maintain consistent operations across diverse geographical locations while overcoming potential localized internet limitations.
Types of VPN Connections
Remote Access VPN
Key characteristics of remote access VPNs include:
- Individual user connections: each employee authenticates individually.
- On-demand access: Users initiate a connection when needed, providing flexibility.
- Device-level security: VPN software protects each device that connects to the network.
- Scalable user management: Admins can quickly add or remove users, assign distinct access levels and monitor individual usage patterns from a central dashboard.
Remote access VPNs are an essential piece of security infrastructure for any business operating with dispersed employees.
Site-to-Site VPN
Key features of site-to-site VPNs include:
- Always-on connections: A site-to-site VPN maintains a persistent connection between office locations without user intervention.
- Network-level integration: All devices within a connected location are automatically granted access to resources across the network.
- Infrastructure-based: VPNs are configured on routers and firewalls to provide network-wide protection rather than device-specific coverage.
- Centralized management: IT can manage all connections from a centralized dashboard.
Site-to-site VPNs are best for organizations with multiple locations that need constant access to shared resources, databases, or applications. They integrate seamlessly with GTT’s Envision platform for comprehensive network management and monitoring across all connected locations.
Choosing the Right VPN for Your Business
VPNs should form a key part of your broader network security strategy. Selecting the right fit for your organization requires carefully considering and evaluating your needs and technical requirements. Some key considerations include:
- Scalability: An enterprise VPN will accommodate current and projected headcount.
- Security features: Look for AES-256 encryption, kill switches, multi-factor authentication (MFA) and leak protection.
- Performance requirements: Evaluate VPN solutions’ bandwidth capabilities, server locations and connection speed guarantees.
- Integration capabilities: Verify compatibility between your new VPN and your existing security stack, infrastructure and cloud environments.
- Compliance requirements: Ensure the solution you go with meets industry-specific regulations and provides the necessary audit controls and data protection features.
For the most comprehensive networking solution, integrate your VPN service with VPLS connectivity options from GTT to create a robust, scalable network for your business’s future.
Choosing the Right VPN for Your Business
GTT managed networking services combine advanced VPN technologies with expert support, ensuring your business maintains operational continuity with secure connections across locations. Whether you need remote access for dispersed teams or site-to-site connections linking your global locations, our scalable solutions grow with your business while maintaining the highest security standards in the industry.
Our expert team handles implementation, monitoring and ongoing management, allowing you to focus on core business operations, knowing your data is secure. Explore GTT Managed Networking, then when you’re ready, talk to our experts to learn more about how GTT can enhance your network security.
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