Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.112.0P1 - Page 806

Hostbased Authentication : disabled. RSA Authentication : disabled. Challenge Response Auth : enabled. Vty Encryption HMAC 2 aes128-cbc hmac-md5 4 aes128-cbc hmac-md5 * 5 aes128-cbc hmac-md5 Dell# Remote IP 10.16.127.141 10.16.127.141 10.16.127.141 SMS-OTP Mechanism A short message service one time password (SMS-OTP) is a free RADIUS module to implement two factor authentication. There are multiple 2FA mechanisms that can be deployed with the RADIUS. Mechanisms such as the Google authenticator do not rely on the Access-Challenge message and the SMS-OTP module rely on the Access-challenge message. The main objective of this feature is to handle the Access-Challenge messages and sends the Access-Request message with user's response. This module requires NAS for handling the access challenge from the RADIUS server. NAS sends the input OTP in an Access-Request to the RADIUS server, and the user authentication succeeds or fails depending upon the Access-Accept or Access-Reject response received at NAS from the RADIUS server. Configuring the System to Drop Certain ICMP Reply Messages You can configure the Dell Networking OS to drop ICMP reply messages. When you configure the drop icmp command, the system drops the ICMP reply messages from the front end and management interfaces. By default, the Dell Networking OS responds to all the ICMP messages. • Drop the ICMP or ICMPv6 message type. drop {icmp | icmp6} CONFIGURATION mode. You can configure the Dell Networking OS to suppress the following ICMPv4 and ICMP6 message types: Table 84. Suppressed ICMP message types ICMPv4 message types Echo reply (0) All sub types of destination unreachable (3) Source quench (4) Redirect (5) Router advertisement (9) Router solicitation (10) Time exceeded (11) IP header bad (12) Timestamp request (13) 806 Security