Does Spectrum use ICMP request Type 13 and 14 ?

Products

• CA Spectrum

Issue/Introduction

We are planning to block ICMP Timestamp Request (Type 13) and ICMP Timestamp Reply (Type 14) with a firewall on the network managed by Spectrum 21.2.4 as a security measure.

Plan to add the following settings:
ipchains -A input -p icmp --icmp-type timestamp-request -j DROP
ipchains -A output -p icmp --icmp-type timestamp-reply -j DROP

Does Spectrum uses ICMP Type13 and Type14.

 

Environment

Release : 21.2

Cause

Spectrum doesn't use Type 13 and 14.

Resolution

ICMP used by Spectrum is ICMP Echo Request (Type 8) and ICMP Echo Reply (Type 0). 　

Spectrum does not use ICMP Timestamp Request (Type 13) and ICMP Timestamp Reply (Type 14).