Log Files

When troubleshooting problems with your firewall, it is very likely you have to check the logs available on your system. In the UI of OPNsense, the log files are generally grouped with the settings of the component they belong to. The log files can be found here:

Captive Portal	Services ‣ Captive Portal ‣ Log File	Events from Captive Portal go here
DHCPv4	Services ‣ DHCPv4 ‣ Log File	DHCP events get logged here
Dnsmasq DNS	Services ‣ Dnsmasq DNS ‣ Log File	The DNSmasq Forwarder logs
HAProxy	Services ‣ HAProxy ‣ Log File	The logs of the Reverse Proxy
Intrusion Detection	Services ‣ Intrusion Detection ‣ Log File	Suricata Logs are here
Network Time	Services ‣ Network Time ‣ Log File	NTP daemon logs
Unbound DNS	Services ‣ Unbound DNS ‣ Log File	Unbound resolver logs can be found here
Web Proxy	Services ‣ Web Proxy ‣ Log File	Squid access.log, store.log and cache.log