ICMP Timestamps

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L2 Linker

ICMP Timestamps

Hi,

Can anyone please tell me if there is a way to stop my PA from responding to ICMP type 13 and 14 timestamp requests/replies?

Cheers

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L4 Transporter

Hello

You can create custom signature based on icmp type.

Please refer to the following KB

Security Policy to Allow/Deny a Certain ICMP Type

Regards,

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L6 Presenter

Excellent

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L2 Linker

That's perfect for a policy level but what about at Management Profile level for the interfaces.

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L4 Transporter

I believe there is no way to configure disabling ICMP type 13 and 14.

How about configuring security policy which applies to 'from Trust to Trust' if you want to block it on Trust I/F?

I'm not sure it works or not, just guessing.

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L7 Applicator

Hello Tezza,

I hope, management profile will only allow Echo request (ICMP type 8) and reply (ICMP type 0), if you enable ping on it. Also, as emr suggested, you may create a profile for intra zone traffic.

Thanks

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L1 Bithead

Did you ever find a solution for this?

 

it is five years later and the interfaces are still answering these oddball ICMP requests (which can be useful to hackers).

 

We have PING on the interface profile and it is answering these all day long.

 

Royal

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Cyber Elite

Please see below article as per this you can block ICMP type 13 and 14.

 

https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClFZCA0

MP
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L1 Bithead

Trying block them passing through the firewall is easy enough.

I'm trying to stop the firewall from answering them.

Will a policy affect traffic that is directed at the Interface IP of the firewall? Normally that is affected only by Management Profile.  I don't write policy rules to allow the firewall to receive & send SSH, SNMP, syslogs, pings, etc.

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