Technical Note: How resolve the public hostname of a FortiGate captive portal to an internal IP
Description
Solution
The captival portal has a hostname of "fortinet-portal.company.abc" this will resolve to a public IP address. The local FortiGate interface IP address is 20.20.20.1.
Add a new static DNS entry on the FortiGate to resolve fortinet-portal.company.abc to 20.20.20.1 - see related article
On the FortiGate CLI change portal address from 10.20.20.1 to fortinet-portal.company.abc
DNS server settings - x.x.x.x,8.8.8.8 (x.x.x.x = Wireless interface IP address)
This article describes how the hostname of the public captive portal can be resolved to the local intern IP address on the FortiGate SSID.
Solution
The captival portal has a hostname of "fortinet-portal.company.abc" this will resolve to a public IP address. The local FortiGate interface IP address is 20.20.20.1.
Add a new static DNS entry on the FortiGate to resolve fortinet-portal.company.abc to 20.20.20.1 - see related article
On the FortiGate CLI change portal address from 10.20.20.1 to fortinet-portal.company.abc
config firewall auth-portalAdd Wifi interface address (20.20.20.1) as DNS server on the SSID along side the global DNS server
set portal-addr "fortinet-portal.company.abc"
end
DNS server settings - x.x.x.x,8.8.8.8 (x.x.x.x = Wireless interface IP address)
