pfSense Troubleshooting Guides

pfSense errors can surface at the worst possible moments — during deployments, under peak traffic, or in the middle of critical operations. This collection of 3 troubleshooting guides covers the most common pfSense issues encountered in network infrastructure, protocols, and connectivity. Each article walks through specific error messages with step-by-step diagnosis, root cause analysis, and verified solutions. Whether you're dealing with configuration problems, authentication failures, timeout errors, or unexpected behavior, these guides are designed to get you from error message to resolution as quickly as possible. Solutions are backed by official documentation and real-world production experience.

Error Quick Reference

Article	Description
How to Fix "TLS Error: TLS key negotiation failed to occur" in OpenVPN on pfSense	Fix OpenVPN "TLS handshake failed" errors in pfSense. Learn how to resolve TLS key negotiation failures via firewall rules, certificates, and MTU settings.
Troubleshooting pfSense Firewall Rule Drops: Fixing High Latency, Packet Loss, and 502 Errors	Diagnose and resolve pfSense firewall rule misconfigurations causing high latency, packet loss, and 502 Bad Gateway errors on upstream reverse proxies.
Troubleshooting pfSense Firewall Rules: Fixing High Latency, Packet Loss, and 502 Bad Gateway Errors	Comprehensive guide to resolving pfSense firewall rule misconfigurations causing high latency, packet loss, and 502 bad gateway errors. Includes diagnostic comm