C613-50631-01 Rev A Command Reference for IE340 Series 886
AlliedWare Plus™ Operating System - Version 5.5.3-0.x
IP ADDRESSING AND PROTOCOL COMMANDS
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.
Syntax
ip icmp-timestamp
no ip icmp-timestamp
Default Allowed
Mode Global Configuration
Example To drop ICMP timestamp packets, use the commands:
awplus# configure terminal
awplus(config)# no ip icmp-timestamp
To allow ICMP timestamp packets again, use the commands:
awplus# configure terminal
awplus(config)# ip icmp-timestamp
Related
commands
ip tcp-timestamp
Command
changes
Version 5.5.2-0.1: command added
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