Some SES NEW SKIES customers choose to filter ICMP traffic on their connection for security or other reasons. SES NEW SKIES have no objections to this, although we do request that you do not filter ICMP traffic from some of our networks. This will allow us to monitor your service correctly, and will assist in troubleshooting in the event of an outage.

The blocks that we request you allow inbound and outbound ICMP traffic for are:

63.100.200.0/27
63.100.200.64/28
66.178.0.0/23
66.178.2.0/24
80.247.128.0/24
198.78.137.254/32
198.78.137.55/32
198.78.138.128/29
212.153.26.3/32
212.153.26.68/32
216.236.205.12/32

If you have any queries with this, then please do not hesitate to contact the SES NEW SKIES NOC.