SonicOS 8 Users

How Does SSO Agent Work?

The SSO Agent can be installed on any workstation or server with a Windows domain that can communicate with clients and the firewall directly using the IP address or using a path, such as VPN. It is recommended, however, that the SSO Agent be installed on separate, standalone workstations or servers. For installation instructions for the SSO Agent, see Installing the SonicWall SSO Agent.

Multiple SSO agents are supported to accommodate large installations with thousands of users. You can configure up to eight SSO agents, each running on a dedicated, high-performance PC in your network.

When using NetAPI or WMI, one SSO Agent can support up to approximately 2500 users, depending on the performance level of the hardware that it is running on, how it is configured on the firewall, and other network-dependent factors. Depending on similar factors, when configured to read from domain controller security logs, one SSO Agent can support a much larger number of users identified through that mechanism, potentially up to 50,000+ users

The SSO Agent only communicates with clients and the firewall. The SSO Agent uses a shared key for encryption of messages between the SSO Agent and the firewall.

The shared key is generated in the SSO Agent and the key entered in the firewall during SSO configuration must match the SSO Agent-generated key exactly.

The firewall queries the SSO Agent over the default port 2258. The SSO Agent then communicates between the client and the firewall to determine the client’s user ID. The SSO Agent is polled, at a rate that is configurable by the administrator, by the firewall to continually confirm a user’s login status.

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