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Date:      Sat, 12 Jun 1999 11:13:03 -0400 (EDT)
From:      Spike <spork@narcissus.net>
To:        Nate Williams <nate@mt.sri.com>
Cc:        Pete Fritchman <petef@netreach.net>, Ruslan Ermilov <ru@ucb.crimea.ua>, "Jason L. Schwab" <jschwab@royal.net>, ghandi@mindless.com, freebsd-security@FreeBSD.ORG
Subject:   Re: firewalls
Message-ID:  <Pine.BSF.4.05.9906121112550.6023-100000@pigstuy.penguinpowered.com>
In-Reply-To: <199906120353.VAA23229@mt.sri.com>

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On Fri, 11 Jun 1999, Nate Williams wrote:

> [ blocking all ICMP packets ]
> > I did it before and it worked fine.
> 
> It will affect people trying to connect to you though.  *DON'T* firewall
> something unless you know the effects of it.  Blocking all ICMP is a
> violation of RFC, and shows that you don't understand how TCP/IP works.
> 
> *MOST* of the ICMP types can be blocked, but not all of them.

Which are appropriate to block? 

> 
> 
> 
> Nate
> 
> 
> 
> To Unsubscribe: send mail to majordomo@FreeBSD.org
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> 
> 


	-Spike Gronim
	 sporkl@ix.netcom.com	
	 Finger gronimw@shell.stuy.edu for PGP public key.

		The majority only rules those who let them. 




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