VPN Not Working for Your Business in Peachtree Corners? Here's What to Do.

Your team can't connect. Remote employees are locked out. Deadlines are stacking up, and your VPN is completely unresponsive. If your vpn not working business situation is happening right now, you're not alone — and you don't have to troubleshoot it blindly. COMNEXIA has been solving exactly these problems for businesses across Peachtree Corners, Gwinnett County, and the surrounding metro area since 1991. We know what breaks, why it breaks, and how to fix it fast.

Whether your office is in Technology Park, near the Holcomb Bridge corridor, or anywhere else in Peachtree Corners, a VPN outage can bring your entire remote workforce to a standstill. This page walks you through the most common causes, what you should check first, and when it's time to call in professional IT support.

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Why Is My Business VPN Not Working?

VPN failures in a business environment are rarely as simple as a bad password. The causes are usually layered, and the fix depends on identifying the right one. Here are the most common culprits COMNEXIA sees when responding to vpn not working business calls from companies in Peachtree Corners and nearby cities like Norcross and Duluth.

Firewall or Security Policy Changes

If someone recently updated your firewall rules, pushed a new security policy, or applied a patch to your network appliance, those changes can silently block VPN traffic. This is one of the top causes of sudden VPN failures in business environments. The VPN appears to connect but immediately drops, or it fails at authentication entirely.

Expired Certificates or Licenses

Business-grade VPN solutions rely on digital certificates and, in many cases, active software licenses. When these expire, the VPN stops functioning without any obvious warning to end users. Your employees just see an error screen. This is especially common with SSL VPNs and solutions tied to UTM appliances.

ISP or DNS Issues on Either End

The problem isn't always on your office network. If a remote employee in Lilburn or Dunwoody is on a residential internet connection with DNS issues, their device may not be able to resolve the VPN gateway address at all. Similarly, if your office ISP in Peachtree Corners is experiencing routing problems, incoming VPN connections can fail even though everything on your local network looks fine.

Split Tunneling Misconfiguration

VPN split tunneling controls which traffic goes through the secure tunnel and which goes directly to the internet. A misconfiguration here can cause users to connect successfully but be unable to reach internal resources like file servers, printers, or line-of-business applications.

Active Directory or Authentication Server Problems

Most enterprise VPNs authenticate against Active Directory or a RADIUS server. If your domain controller is offline, overloaded, or has a replication issue, VPN logins will fail even though the VPN infrastructure itself is perfectly healthy.

Client Software Conflicts or Outdated VPN Agents

A Windows update, a new antivirus deployment, or a conflicting network adapter can break VPN client software on individual machines. If only some users are affected, this is often the culprit. Businesses in Gwinnett County running mixed fleets of devices see this frequently after major OS update cycles.

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What Should You Check First When Your Business VPN Stops Working?

Before you call support, run through this quick checklist. It won't always solve the problem, but it will help you describe the issue accurately and may point to an obvious fix.

• Is it affecting all users or just some? Widespread failures usually point to server-side or network issues. Isolated failures often point to client devices or user accounts.
• Did anything change recently? Updates, configuration changes, new equipment, or even a power outage at your office can all trigger VPN failures.
• Can affected users connect to the internet normally? If a remote employee has no internet access at all, the VPN issue is secondary.
• Is the VPN gateway device online and accessible from inside your network? Log into your firewall or VPN appliance and check its status dashboard.
• Are there any error messages or codes? Write down the exact error text. Codes like Error 800, Error 812, or GRE-blocked errors each point to specific problems.
• When did the VPN last work correctly? Pinpointing a timeline helps narrow the cause significantly.

If you've run through this list and still can't identify the problem, it's time to bring in a managed IT provider with the experience and tools to dig deeper. COMNEXIA serves businesses throughout Peachtree Corners, Norcross, Duluth, Dunwoody, and Lilburn, and we can often diagnose the issue remotely within minutes of connecting to your environment.

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How Does a Managed IT Provider Fix a VPN Not Working for a Business?

When COMNEXIA responds to a vpn not working business issue, we don't guess. We follow a structured diagnostic process that has been refined over 35 years of supporting hundreds of businesses across Georgia and beyond.

Our technicians start by reviewing event logs, authentication logs, and firewall traffic logs simultaneously to identify where the failure is actually occurring. We check certificate validity, license expiration dates, and policy configuration against your documented baseline. If the issue is on a client device, we can connect remotely to the affected machine and walk through the VPN client configuration in real time. If the problem is infrastructure-level, we coordinate with your ISP or hardware vendor directly so you don't have to navigate those calls yourself.

For businesses in Peachtree Corners with on-site needs, our team is based in Roswell and can reach your location quickly. We cover all of Gwinnett County and the surrounding communities including Norcross, Duluth, Dunwoody, and Lilburn.

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Should Your Business Use a Different VPN Solution?

If your VPN is breaking repeatedly, the problem may not be a one-time configuration error. It may be that your current solution isn't the right fit for how your business actually operates today. Many businesses in Peachtree Corners are still running VPN setups that were designed five or ten years ago for a handful of remote users. Post-pandemic, those same businesses now have dozens of remote employees connecting daily, and the original infrastructure simply wasn't built for that load.

COMNEXIA can assess your current VPN setup and recommend whether repairs and optimization make sense, or whether migrating to a more scalable solution would better serve your team. Options range from modern SSL VPN platforms to zero-trust network access architectures that are better suited to hybrid work environments.

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Why Do Peachtree Corners Businesses Choose COMNEXIA for VPN Support?

There are a lot of IT companies operating in Gwinnett County. Here's what sets COMNEXIA apart when a vpn not working business call comes in.

• 35 years in business. We've been solving IT problems since 1991. We've seen every version of this problem across every type of business environment.
• Local headquarters in Roswell, Georgia. We're not a national call center. We're your neighbors, and we can be on-site when remote support isn't enough.
• Hundreds of businesses served. Our experience spans small professional offices, multi-location companies, and large enterprises across Georgia.
• Automotive dealership specialization. If your dealership in Peachtree Corners or anywhere in Gwinnett County is dealing with a VPN failure that's affecting your DMS connectivity or manufacturer portals, we have specific expertise in that environment.
• Responsive support, not a ticket queue. We understand that a broken VPN isn't a tomorrow problem. It's a right-now problem, and we treat it that way.

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Frequently Asked Questions: VPN Not Working for Businesses

Why does my business VPN connect but not work?

This is a common scenario called a "connected but unable to pass traffic" failure. It usually points to a routing issue, a split tunneling misconfiguration, or a firewall rule that's allowing the VPN handshake but blocking traffic on the internal network. An IT professional can identify the specific rule or setting causing the blockage within your environment.

Can a Windows update break my business VPN?

Yes. Certain Windows updates modify network adapter settings, routing tables, or built-in VPN client components in ways that conflict with third-party VPN software. If your VPN stopped working shortly after a Windows update pushed across your organization, that's almost certainly the cause and it's a known, fixable issue.

How long does it take to fix a business VPN outage?

It depends on the cause. Simple issues like an expired certificate or a misconfigured client can be resolved in under an hour. Infrastructure-level problems or ISP-related issues may take longer, particularly if third-party vendors need to be involved. COMNEXIA prioritizes VPN outages as critical issues because we understand the business impact they create.

Is it better to repair my current VPN or replace it?

That depends on why it keeps failing and how old the underlying infrastructure is. If your VPN appliance is out of support, your licenses have lapsed, or your architecture doesn't match your current remote work needs, a replacement may be more cost-effective and reliable in the long run. COMNEXIA will give you an honest assessment rather than just billing hours on a system that's past its useful life.

Does COMNEXIA support businesses outside of Peachtree Corners?

Absolutely. While this page is focused on businesses in Peachtree Corners and Gwinnett County, COMNEXIA supports clients throughout the Atlanta metro area, including Norcross, Duluth, Dunwoody, Lilburn, and well beyond. Our remote support capabilities also mean we can assist businesses across Georgia and nationally when needed.

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Get Your Business VPN Working Again - Contact COMNEXIA Today

A broken VPN is a productivity emergency. Every hour your team can't connect is an hour of lost output, delayed projects, and growing frustration. COMNEXIA has spent 35 years earning the trust of hundreds of businesses across Georgia, and we're ready to bring that experience to your Peachtree Corners or Gwinnett County business today.

Don't wait for the problem to resolve itself. It won't. Call us now at (877) 600-6550 or fill out our contact form to get a technician working on your vpn not working business issue right away. We serve Peachtree Corners, Norcross, Duluth, Dunwoody, Lilburn, and the entire surrounding area from our headquarters in Roswell, Georgia.

COMNEXIA Corporation | Roswell, Georgia | Serving Peachtree Corners and Gwinnett County Since 1991 | (877) 600-6550