Administrator Guide

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)
Timestamp reply (14)
Information request (15)
Information reply (16)
Address mask request (17)
Address mask reply (18)
NOTE: The Dell Networking OS does not suppress the ICMP message type echo request (8).
832 Security