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Created 1 month ago by david

Updated 2 weeks ago by david

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FortiOS
v7.4.x
v7.2.x
- Check Internet Service Database Match
- Block QUIC in 7.2.x
v7.0.x
v6.4.x
- Device-Local Certificate Expired
- Device Table Size Maximum
v6.2.x
- Show WAN interface public IPs
- FortiClient Error Codes
v6.0.x
v5.6.x
v5.4.x
v5.2.x
v5.0.x

Books

FortiOS

v6.2.x

Show WAN interface pub...

Show WAN interface public IPs

(2025-06-05)

diagnose system waninfo ipify

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Tac Report

OSPF Troubleshooting

Memory Use

Enable the SSLVPN GUI Menus

DHCP Debugging

Console Pager

BGP Neighbours -- Advertised, Received, and Learned

Check Internet Service Database Match

Block QUIC in 7.2.x

Show FQDN IPs in DNS Cache

Looking at logs via CLI

Link Monitor

IPsec MTU Varies By Encryption Algorythm

IPsec MTU Adjustments

Export Logs From Fortigate Disk Over FTP

Debug sdwan

Debug PPPoE Connections

Debug messages with timestamp

CLI Policy Lookup

Check Geo-IP Region For A Specific IP

Basic SDWAN Setup

Device-Local Certificate Expired

Device Table Size Maximum

Show WAN interface public IPs

FortiClient Error Codes

Wifi 802.1x with LDAP Groups

VPN Tunnel Interface Address

VPN Debug

SD-WAN Diagnostics

Read-Only Admin Profile

List Connected Users

LDAP lookup account considerations

IPSA self test failed, disable IPSA!

iPerf3 on Fortigates

Displaying Logs From Console

CLI Restore Configuration

VPN Ciphers, Encryption, DH Settings Recommendations

Traffic Shaping Policy

System Version from CLI

SSLVPN DNS Suffix

SSL Security Settings

SSH Pubkey Login

Routing Table

Microsoft Office Whitelisting

List DHCP Clients CLI

IPsec Not Passing Packets

FortiOS LLDP

BGP Sessions

BGP Neighbors

Wifi Clients Connect But Can't Get DHCP Lease

VPN Flapping Leads To Bogus Routing

System Time

SSLVPN Logs Out After 8 Hours

RTC Power Status Failed

List SSLVPN Users

List DHCP Client Leases

Forticlient Registering To Fortigate

Fixing HA Sync Problems

Factory Reset

Debug Sniffer

Debug Session

Debug Flow

CPU is pinned

Connecting Multiple vDOMs to the same VLAN

CLI Upgrade Firmware

CLI Disk Scan FSCK

VPN Tunnel Details

VPN Fragmentation

VoIP Clients with Fortigates

Management Access

HA Cluster Synchronization

HA Cluster Status

EXT3 fs error (device)

Dual-WAN Gateways

DHCP Reservation

Configuration Preparation

Test Authentication Servers

Syslog

Simple Commands

Routing Table