ICMP reply size in 4.1

Not applicable

ICMP reply size in 4.1

Is it possible in 4.1 to limit the size of icmp replies or strip any payload in order to discourage tunneling via ICMP ?

L5 Sessionator

Re: ICMP reply size in 4.1


For me, you can't do that.

If the only thing you need in icmp is ping, ping is an app in palo.

Carefull, allow icmp not allow ping and reverse.


L3 Networker

Re: ICMP reply size in 4.1


You could try using the ping command in the following way to alter the size of the ping packets

PA-500> ping size 65468 source host

This does give you the ability to vary the size of the icmp packets.

Although the size has to be between 0-65468.



L5 Sessionator

Re: ICMP reply size in 4.1

How about using Zone Protection  ?

Particularly ,ICMP Large Packet(>1024)

Other Than that I second


L6 Presenter

Re: ICMP reply size in 4.1

I think it would be great if the PA could have a setting to strip the icmp (echo-request/reply) contents. Today one is forced to do this through proxyfirewall using icmp-proxy.

Does anyone know if there perhaps already exists a RFE to strip ICMP contents when passing through a PA device (or if this even is theoretically possible by the hardware being used)?

L5 Sessionator

Re: ICMP reply size in 4.1

I am not aware of any  RFE for this feature.   & ,Please check with your  SE for a better insight.


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