TACACS+ parameters
Digi TransPort User Guide 687
TACACS+ parameters
The Digi TransPort range of routers supports Terminal Access Controller Access-Control System
Plus (TACACS+) for controlling access to the router.
About TACACS
TACACS+ provides authentication, authorization and accounting (AAA) services.
TACACS+ can be used to control the following access methods:
• Secured asynchronous serial (ASY) ports
•Telnet
•SSH
•FTP
•HTTP/HTTPS
•SNMP
When any sort of request is performed by the TACACS+ client, the client first checks to see if a
socket to the server (primary or backup) is already open. If a socket is already open, that socket is
used for the TACACS+ request. If no socket is open, the primary server is tried first. If the primary
server socket fails to open, the backup server will be tried. Regardless of whether the primary or
backup socket connected, the primary server is always tried first on the next connection attempt.
Once the connection to the TACACS+ server opens, all pending requests are sent to the TACACS+
server.
If a connection to the TACACS+ server is not possible due to network or server problems, all
requests by applications are denied.
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