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Firewall Rule - Block Any ICMP - Still Allows Traceroute

Hello Everyone,

I am a student in college and I have a project where I have to set up a pfsense firewall in virtualbox. One of the requirements is to block all incoming ICMP packets from the WAN including traceroute. I created the Firewall rule on the WAN interface blocking any ICMP traffic. However, traceroute is not getting blocked and is being allowed through. Do you have any idea of what I may be doing wrong. Any help is appreciated, thank you.Image may be NSFW.
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