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Troubleshooting Guide
Introduction
Troubleshooting outline
Diagnosing server-policy connectivity issues
Diagnosing Network Connectivity Issues
Checking hardware connections
Examining the ARP table
Checking routing
Examining the routing table
Checking port assignments
Performing a packet trace
Debugging the packet processing flow
Diagnosing server-policy access issues
Server-policy access failure
Server policy intermittently inaccessible
Server-policy outage
Checking backend server status & issues
Diagnosing debug flow
Error codes displayed when visiting server policy
Visiting Server-Policy Has Long Response Time
Checking Attack/Traffic/Event logs
FAQ
How to check attack logs in FortiWeb
How to check traffic logs in FortiWeb
Forwarding non-HTTP/HTTPS traffic
Diagnosing system issues
System boot-up issues
Hard disk corruption or failure
Power supply failure
System login & authentication issues
FAQ
Login common issues
WebUI authentication issues
Certificate-based WebUI login failure
Resetting passwords
SAML SSO Login issues
System license issues
Firmware upgrade failures
DB version&update info
Cryptographic Key
Resetting the configuration
Restoring firmware (“clean install”)
Checking System Resource Issues
Checking CPU information&Issues
Checking memory usage
Diagnosing memory leak issues
Diagnosing kernel memory leak issues
Checking disk information & issues
Retrieving system&debug logs
Retrieving system logs in backend system
Customizing and downloading debug logs
Diagnose Crash & Coredump issues
Common troubleshooting steps
Checking core files and basic coredump information
Collecting core/coredump files and logs
What to do when coredump files are truncated or damaged
Diagnose memory violation issues
Diagnose software function issues
Server policy
FAQ
SSL/TLS
FAQ
Diagnosing SSL/TLS handshake failures
Decrypting SSL packets to analyze traffic issues
Enabling diagnose debug flow to retrieve TLS Pre-master secrets
Decrypting TLS 1.2/1.1/1.0 Traffic
Decrypting TLS 1.3 Traffic
An alternative way to decrypt TLS traffic on Windows PC
Application Delivery - URL Rewriting
Application Delivery - Site Publish
FAQ
Troubleshoot Site-Publish Issues
Application Delivery - Caching
FAQ
Troubleshoot for caching issues
Application Delivery - Lua Script
FAQ
Application Delivery - Waiting Room
Web Protection - General Issues
FAQ
Web Protection - Known Attack
FAQ
Web Protection - Advanced Protection
FAQ
Web Protection - Input Validation
FAQ
Web Protection - Bot Mitigation
FAQ
Web Protection - API Protection
FAQ
Web Protection - IP Protection
FAQ
Machine Learning - Anomaly Detection
FAQ
Machine learning trouble-shooting
ZTNA troubleshooting and debugging
HA issues
FAQ
HA trouble-shooting
Log&Report issues
Common troubleshooting methods for issues that Logs cannot be displayed on GUI
Step-by-step troubleshooting for log display on FortiWeb GUI failures
Logs cannot be displayed on FortiAnalyzer
Replacement message
FAQ
Diagnose hardware issues
Using diagnose commands
Diagnosing Power Supply issues
Diagnosing hard disk issues
Diagnosing SSL Card issues
Diagnosing NIC issues
System tools & diagnose commands
Diagnostic Commands
Execute Commands
Ping & Traceroute
Packet capture
Packet capture via CLI command
Packet capture via Web UI
Diff
Run backend-shell commands
Upload a file to or download a file from FortiWeb
Home
FortiWeb 7.4.1
Troubleshooting Guide
7.4.1
7.4.2
7.4.1
7.4.0
7.2.3
7.2.3
7.2.2
7.0.4
7.0.1
Diagnose hardware issues
Diagnose hardware issues
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Diagnose hardware issues
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FortiGate / FortiOS
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Switching
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Security Awareness and Training
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Ordering Guides
Download PDF
Table of Contents
Introduction
Troubleshooting outline
Diagnosing server-policy connectivity issues
Diagnosing Network Connectivity Issues
Checking hardware connections
Examining the ARP table
Checking routing
Examining the routing table
Checking port assignments
Performing a packet trace
Debugging the packet processing flow
Diagnosing server-policy access issues
Server-policy access failure
Server policy intermittently inaccessible
Server-policy outage
Checking backend server status & issues
Diagnosing debug flow
Error codes displayed when visiting server policy
Visiting Server-Policy Has Long Response Time
Checking Attack/Traffic/Event logs
FAQ
How to check attack logs in FortiWeb
How to check traffic logs in FortiWeb
Forwarding non-HTTP/HTTPS traffic
Diagnosing system issues
System boot-up issues
Hard disk corruption or failure
Power supply failure
System login & authentication issues
FAQ
Login common issues
WebUI authentication issues
Certificate-based WebUI login failure
Resetting passwords
SAML SSO Login issues
System license issues
Firmware upgrade failures
DB version&update info
Cryptographic Key
Resetting the configuration
Restoring firmware (“clean install”)
Checking System Resource Issues
Checking CPU information&Issues
Checking memory usage
Diagnosing memory leak issues
Diagnosing kernel memory leak issues
Checking disk information & issues
Retrieving system&debug logs
Retrieving system logs in backend system
Customizing and downloading debug logs
Diagnose Crash & Coredump issues
Common troubleshooting steps
Checking core files and basic coredump information
Collecting core/coredump files and logs
What to do when coredump files are truncated or damaged
Diagnose memory violation issues
Diagnose software function issues
Server policy
FAQ
SSL/TLS
FAQ
Diagnosing SSL/TLS handshake failures
Decrypting SSL packets to analyze traffic issues
Enabling diagnose debug flow to retrieve TLS Pre-master secrets
Decrypting TLS 1.2/1.1/1.0 Traffic
Decrypting TLS 1.3 Traffic
An alternative way to decrypt TLS traffic on Windows PC
Application Delivery - URL Rewriting
Application Delivery - Site Publish
FAQ
Troubleshoot Site-Publish Issues
Application Delivery - Caching
FAQ
Troubleshoot for caching issues
Application Delivery - Lua Script
FAQ
Application Delivery - Waiting Room
Web Protection - General Issues
FAQ
Web Protection - Known Attack
FAQ
Web Protection - Advanced Protection
FAQ
Web Protection - Input Validation
FAQ
Web Protection - Bot Mitigation
FAQ
Web Protection - API Protection
FAQ
Web Protection - IP Protection
FAQ
Machine Learning - Anomaly Detection
FAQ
Machine learning trouble-shooting
ZTNA troubleshooting and debugging
HA issues
FAQ
HA trouble-shooting
Log&Report issues
Common troubleshooting methods for issues that Logs cannot be displayed on GUI
Step-by-step troubleshooting for log display on FortiWeb GUI failures
Logs cannot be displayed on FortiAnalyzer
Replacement message
FAQ
Diagnose hardware issues
Using diagnose commands
Diagnosing Power Supply issues
Diagnosing hard disk issues
Diagnosing SSL Card issues
Diagnosing NIC issues
System tools & diagnose commands
Diagnostic Commands
Execute Commands
Ping & Traceroute
Packet capture
Packet capture via CLI command
Packet capture via Web UI
Diff
Run backend-shell commands
Upload a file to or download a file from FortiWeb