Configuration Guide User guide

146 FastIron Configuration Guide
53-1002494-02
TACACS and TACACS+ security
Enabling TACACS
TACACS is disabled by default. To configure TACACS/TACACS+ authentication parameters, you must
enable TACACS by entering the following command.
Brocade(config)#enable snmp config-tacacs
Syntax: [no] enable snmp <config-radius | config-tacacs>
The <config-radius> parameter specifies the RADIUS configuration mode. RADIUS is disabled by
default.
The <config-tacacs> parameter specifies the TACACS configuration mode. TACACS is disabled by
default.
Identifying the TACACS/TACACS+ servers
To use TACACS/TACACS+ servers to authenticate access to a Brocade device, you must identify the
servers to the Brocade device.
For example, to identify three TACACS/TACACS+ servers, enter commands such as the following.
Brocade(config)#tacacs-server host 207.94.6.161
Brocade(config)#tacacs-server host 207.94.6.191
Brocade(config)#tacacs-server host 207.94.6.122
Syntax: tacacs-server host <ip-addr> | <ipv6-addr> | <hostname> [auth-port <number>]
The <ip-addr>|<ipv6-addr>|<hostname> parameter specifies the IP address or host name of the
server. You can enter up to eight tacacs-server host commands to specify up to eight different
servers.
NOTE
To specify the server's host name instead of its IP address, you must first identify a DNS server using
the ip dns server-address <ip-addr> command at the global CONFIG level.
If you add multiple TACACS/TACACS+ authentication servers to the Brocade device, the device tries
to reach them in the order you add them. For example, if you add three servers in the following
order, the software tries the servers in the same order.
1. 207.94.6.161
2. 207.94.6.191
3. 207.94.6.122
You can remove a TACACS/TACACS+ server by entering no followed by the tacacs-server command.
For example, to remove 207.94.6.161, enter the following command.
Brocade(config)#no tacacs-server host 207.94.6.161
NOTE
If you erase a tacacs-server command (by entering “no” followed by the command), make sure you
also erase the aaa commands that specify TACACS/TACACS+ as an authentication method. (Refer
to “Configuring authentication-method lists for TACACS and TACACS+” on page 149.) Otherwise,
when you exit from the CONFIG mode or from a Telnet session, the system continues to believe it is
TACACS/TACACS+ enabled and you will not be able to access the system.