All Barracuda Web Filters, All Firmware Versions.
If your Web Filter is using both LDAP authentication and NTLM or Kerberos authentication, this is called a Hybrid deployment. If you are deployed inline, and using NTLM/Kerberos for authenication of some proxied traffic, you may need to configure this on older firmwares (6.0 and below) - See 6.0 instructions below. On newer firmwares, this functionality is configured by default.
However if you are deployed as a forward proxy (that is, your LDAP traffic is being proxied to the Web Filter on one port, and your NTLM/Kerberos traffic is being proxied to the Web Filter on a different port) the configuration gets a little more complicated.
For both deployments, refer to the chart below to determine what to do:
6.0 and below: On Users/Groups > Configuration page, enable Hybrid Mode and set the proxy port to the port you are going to proxy your traffic on. Default is 3128. Transparent (inline) traffic
7.0 and above: This is configured by default. Normal traffic will receive LDAP authentication. Any traffic that comes in on your proxy port (Set on the Advanced > Proxy page) will receive NTLM/Kerberos authentication.
6.0 and below: On Users/Groups > Configuration, enable Hybrid Mode and set the proxy port to the port you are going to proxy your traffic on. Default is 3128.
7.0 to 8.0: Contact technical support. This must be configured via the command line.
8.1 and above: On the Advanced > Proxy page, set Enable Port Auth Exemption to yes. This will authenticate any traffic proxied on port 8080 with LDAP authentication. Any traffic proxied on the proxy port (configurable on the same page, default 3128) will receive NTLM/Kerberos authentication.
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