Administrator Guide

• Duplicate Address Confirmation (158)
drop icmp
Drops the ICMPv4 and ICMPv6 packets.
Syntax
drop {icmp | icmp6}
Command Modes CONFIGURATION
Command History
This guide is platform-specific. For command information about other Platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
Version Description
9.11.0.0 Introduced on the S4810, S4820T, S3048–ON, S3100 Series, S4048–ON, S5000, S6000,
S6000–ON, Z9500, Z9100–ON, S6100–ON, S6010–ON, S4048T–ON, C9000, and MXL.
Usage Information
When the drop icmp feature is configured, the system drops the ICMP reply messages on the front end and
management interfaces. By default, the Dell Networking OS responds to all the ICMP messages.
NOTE: There is no separate CLI to enable IP ID randomness. By default, the IP ID in the kernel is
randomized.
For more information on the ICMP message types, see the ICMP Commands section.
System Security Commands
The following section lists the system security commands.
boot-access password
Set a password for the boot loader.
Syntax
boot-access password [encryption-type] boot-password
To remove the GRUB access password, use the no boot-access password command.
Parameters
encryption-type
(OPTIONAL) Enter an encryption type for the boot password.
• 0 directs the system to store the password as clear text.
• 7 directs the system to store the password with a dynamic salt.
boot-password Enter the boot access password.
Defaults None
Command Modes CONFIGURATION.
Command History
Version Description
9.13(0.0) Introduced on the S3048–ON, S4048–ON, S4048T-ON, S6000–ON, S6010–ON,
S6100–ON, and Z9100–ON.
Usage Information
If you enable the boot access password, the system prompts for a password when you access the GRUB
interface.
When you configure the boot access password, ensure that your password meets the following criteria:
• A minimum of eight characters in length
• A minimum of one lower case letter (a to z)
• A minimum of one upper case letter (A to Z)
• A minimum of one numeric character (0 to 9)
1524 Security