Remote Access Dial-In User Service (RADIUS) is a networking protocol providing authentication, authorization, and accounting. The Barracuda NG Firewall can use RADIUS authentication for IPsec, Client-to-Site, and SSL VPN.
Configure RADIUS Authentication
To configure RADIUS for external authentication with the Barracuda NG Firewall,
- Open the Authentication Service page (Config > Full Config > Box > Infrastructure Services).
- In the left navigation pane, select RADIUS Authentication.
- Click Lock.
- From the Configuration Mode menu on the left, select Advanced View.
- Enable RADIUS as external directory service.
- In the Radius Server Address / Port fields, enter the IP address and port of the RADIUS server (default: port
- In the Radius Server Key section, define the pre-shared secret to authorize requests. (Do not use backslashes.)
- From the Group Attribute Delimiter list, you can select how groups are delimited in a list. To explicitly specify a delimiter character, select the Other checkbox and enter the character in the Group Attribute Delimiter field.
- From the Group Attribute Usage list, you can select the group information that is used (e.g.:
CN=…, OU=…, DC=…). You can select:
- All (default) – Complete string.
- First – Only the first group.
- Last – Only the last group.
- If group information is queried from a different authentication scheme, select the scheme from the User Info Helper Scheme list.
- Enter the NAS identifier, IP address, and port if your RADIUS servers requires you to set NAS credentials.
- Enable OTP preserves State if a One-Time Password server (e.g., Symantec VIP Enterprise Gateway 9.0) requires the RADIUS response to contain the 'State' attribute.
- Click Send Changes and Activate.
RADIUS Authentication through the Remote Management Tunnel
To allow remote NG Firewalls to connect to the authentication server through the remote management tunnel, you must activate the outbound BOX-AUTH-MGMT-NAT Host Firewall rule. By default, this rule is disabled.