To view the TACACS+ configuration, use the show running-config tacacs+ command in EXECPrivilege mode.To delete a TACACS+ server host, use the no tacacs-server host {hostname | ip-address}command.freebsd2# telnet 2200:2200:2200:2200:2200::2202Trying 2200:2200:2200:2200:2200::2202...Connected to 2200:2200:2200:2200:2200::2202.Escape character is '^]'.Login: adminPassword:Dell#Dell#Command AuthorizationThe AAA command authorization feature configures Dell Networking OS to send each configurationcommand to a TACACS server for authorization before it is added to the running configuration.By default, the AAA authorization commands configure the system to check both EXEC mode andCONFIGURATION mode commands. Use the no aaa authorization config-commands commandto enable only EXEC mode command checking.If rejected by the AAA server, the command is not added to the running config, and a message displays:04:07:48: %RPM0-P:CP %SEC-3-SEC_AUTHORIZATION_FAIL: Authorization failureCommandauthorization failed for user (denyall) on vty0 ( 10.11.9.209 )Protection from TCP Tiny and Overlapping FragmentAttacksTiny and overlapping fragment attack is a class of attack where configured ACL entries — denying TCPport-specific traffic — is bypassed and traffic is sent to its destination although denied by the ACL.RFC 1858 and 3128 proposes a countermeasure to the problem. This countermeasure is configured intothe line cards and enabled by default.Enabling SCP and SSHSecure shell (SSH) is a protocol for secure remote login and other secure network services over aninsecure network. Dell Networking OS is compatible with SSH versions 1.5 and 2, in both the client andserver modes. SSH sessions are encrypted and use authentication. SSH is enabled by default.For details about the command syntax, refer to the Security chapter in the Dell Networking OS CommandLine Interface Reference Guide.Dell Networking OS SCP, which is a remote file copy program that works with SSH.NOTE: The Windows-based WinSCP client software is not supported for secure copying between aPC and a Dell Networking OS-based system. Unix-based SCP client software is supported.To use the SSH client, use the following command.• Open an SSH connection and specify the hostname, username, port number,encryption cipher,HMACalgorithm and version of the SSH client.Security 789