Ip Icmp-Timestamp - Allied Telesis IE220 Series Manual

IP A P
DDRESSING AND ROTOCOL
-
IP ICMP TIMESTAMP

ip icmp-timestamp

Overview Use this command to allow ICMP timestamp request and response packets.
Use the no variant of this command to drop ICMP timestamp request and response
packets.
You may wish to drop these packets because the ICMP timestamp response
contains the device's date and time. This information could theoretically be used
against some systems to exploit weak time-based random number generators in
other services. In addition, it may be possible to fingerprint devices by analyzing
their responses to invalid ICMP timestamp requests.
ip icmp-timestamp
Syntax
no ip icmp-timestamp
Default Allowed
Mode Global Configuration
Example To drop ICMP timestamp packets, use the commands:
awplus#
awplus(config)#
To allow ICMP timestamp packets again, use the commands:
awplus#
awplus(config)#
Related ip tcp-timestamp
commands
Command Version 5.5.2-0.1: command added
changes
C613-50644-01 Rev B
C
OMMANDS
configure terminal
no ip icmp-timestamp
configure terminal
ip icmp-timestamp
Command Reference for IE220 Series
AlliedWare Plus™ Operating System - Version 5.5.3-0.x
841