ipfw is making contact with port 4021

RW rwmaillists at googlemail.com
Fri Jul 24 01:22:53 UTC 2020

On Thu, 23 Jul 2020 21:11:39 -0400
Ernie Luzar wrote:

> A firewall should not be making its own contact with any public ip 
> address. This is a security hole.
> I have not played with ipfw since before it was rewritten to become 
> ipfw2 so I do not know when this internal "call home"  function was 
> added. pf and ipf are not doing this. I block it to be secure.
> Can any one provide any info about this?

It might help if you explain what you have actually seen.

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