Top 5 Causes of Server Errors (and Their Fixes)

Your team is working hard when a sudden, fear-inducing error message appears, preventing anyone from finishing their projects. Deadlines are missed, and everything comes to a grinding halt.

A server error can bring your entire business to a standstill. Whether you see a cryptic "error 500" message or get hit with a "connection to server failed" alert, these disruptions are expensive and often preventable.

In this guide, we discover the five most common causes of server errors and what you can do to fix them.

1. Hardware Failures

Without healthy hardware, your server will not function as it is supposed to. If your hardware is failing, everything built on top of it becomes unstable.

Common causes for hardware-related server errors include disk failures, memory faults, and overheating. If your hardware is to blame, you will experience sudden crashes, slow performance, or data that becomes unreadable.

How to fix it:

• Monitor server health regularly, including temperature and disk integrity.

• Replace failing components as soon as wear begins to show.

• Use redundant hardware and Redundant Array of Independent Disks (RAID) configurations to reduce single points of failure, reduce downtime, and prevent data loss.

2. Software Bugs and Glitches

If your software has bugs or is glitching, this can also trigger server errors. When an update is faulty, plugins are incompatible, or memory is leaking, your server can behave unpredictably or sometimes crash completely.

These issues are most likely to happen right after a software change.

How to fix it:

• Keep all of your software and operating systems updated to the most recent versions.

• Test all updates in a staging environment before pushing them live.

• Roll back updates immediately if a server error follows deployment.

3. Configuration Errors

Common errors that occur during deployments are: wrong file permissions, incorrect file paths, and misconfigured settings. When multiple changes happen at once, these errors are more likely.

A single misconfiguration can cause a "connection to server failed" message across your entire network, even if your hardware and software are completely fine.

How to fix it:

• Use version control for all configuration files.

• Conduct thorough configuration reviews before and after each deployment.

• Catch errors early by implementing automated configuration management tools.

4. Network Problems

So, what happens when your server is functioning correctly, but the network around it is not? Unfortunately, users could still experience a "connection to server failed" error. DNS issues, routing problems, and firewall misconfigurations are often at fault here.

Network-related server errors can be especially frustrating to diagnose, specifically because they are so difficult to identify.

How to fix it:

• Check DNS settings and confirm propagation is complete.

• Review firewall rules and network routing configurations.

• Monitor bandwidth and latency for unusual patterns.

5. Security Breaches and Attacks

Server errors can be maliciously triggered by cyber attacks. Specifically, a Distributed Denial of Service (DDoS) attack overwhelms your server with traffic, leading to its collapse. This threat is escalating, with a concerning 168% increase in DDoS attacks over the past year. Furthermore, malware can corrupt files, deplete resources, and cause a sudden, unannounced server error.

Signs of an attack include unusual traffic spikes, unknown background processes, and unexpectedly altered files.

How to fix and prevent it:

• Deploy firewalls, intrusion detection systems, and DDoS protection.

• Apply security patches on a consistent schedule.

• Conduct regular security audits to identify and address vulnerabilities.

When to Call IT Support

Some server errors are a quick fix, and others will have you tearing out your hair. So, if you are experiencing recurring “connection to server failed” messages, unexplained downtime, or server errors that just won't stay fixed, then it's time to call in professional IT support.

Here are some of the advantages of professionally managed IT support:

• Faster resolution: Experts reduce downtime by quickly identifying the root cause of error messages.

• Proactive monitoring: Issues are addressed before they escalate into a full server error.

• Expert fixes: Certified technicians remedy the underlying problem, preventing the issue from recurring.

Stop Server Errors in Their Tracks

At Integrated Computer Services (ICS), our US-based support team responds to critical IT issues 24/7, with an average response time of under 15 minutes. No matter what error messages appear on your screen, you'll experience minimal downtime.

ICS, a 2025 MSP 501 winner recognized by Channel Partners and certified as a Microsoft Small Business Specialist, is the managed service provider you can trust to remedy service errors for good. Contact the ICS team today for your free IT assessment.