Dell Force10 MXL Blade MXL 10/40GbE Switch IO Module Configuration Guide - Page 495

To delete a TACACS+ server host, use the no tacacs-server host {hostname | ip-address} command. freebsd2# telnet 2200:2200:2200:2200:2200::2202 Trying 2200:2200:2200:2200:2200::2202... Connected to 2200:2200:2200:2200:2200::2202. Escape character is '^]'. Login: admin Password: FTOS# FTOS# Command Authorization The AAA command authorization feature configures FTOS to send each configuration command 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 the EXEC mode and CONFIGURATION mode commands. To enable only EXEC mode command checking, use the no aaa authorization config-commands command. If rejected by the AAA server, the command is not added to the running config, and messages similar to Message 1 are displayed. Message 1 Configuration Command Rejection 04:07:48: %RPM0-P:CP %SEC-3-SEC_AUTHORIZATION_FAIL: Authorization failure Command authorization failed for user (denyall) on vty0 ( 10.11.9.209 ) Protection from TCP Tiny and Overlapping Fragment Attacks Tiny and overlapping fragment attack is a class of attack where configured ACL entries-denying TCP port-specific traffic-can be bypassed, and traffic can be sent to its destination although denied by the ACL. RFC 1858 and 3128 proposes a countermeasure to the problem. This countermeasure is configured into the stack units and enabled by default. Security | 493