Firewall Wizards mailing list archives
Re: ICMP Packets.
From: "Don Kendrick" <dkendrick () mindspring com>
Date: Tue, 2 Jun 1998 15:52:18 -0400
Agreed on the Path MTU stuff in theory thought it really depends what kind of traffic is going between the internal and external nets. For one, I'd rather deny ICMP and suffer some on performance. Don -----Original Message----- From: Perry E. Metzger <perry () piermont com> To: Don Kendrick <dkendrick () mindspring com> Cc: Toddb <toddb () pacifier com>; firewall-wizards () nfr net <firewall-wizards () nfr net> Date: Tuesday, June 02, 1998 12:14 PM Subject: Re: ICMP Packets.
"Don Kendrick" writes:In the standard configuration of you, with a perimeter router, connected point to point with an ISP's router; there's no reason I can think of other than troubleshooting to allow ICMP packets to enter your perimeter.I think stopping ICMP is, in general, a very bad idea. Among other things, you totally screw up Path MTU discovery, and you make it hard to trace network problems. The Path MTU breakage is especially bad -- it will, among other things, impact your network performance. Perry
Current thread:
- Re: ICMP Packets., (continued)
- Re: ICMP Packets. Henry Hertz Hobbit (Jun 02)
- Re: ICMP Packets. Bennett Todd (Jun 02)
- Re: ICMP Packets. Perry E. Metzger (Jun 02)
- Re: ICMP Packets. tqbf (Jun 02)
- Re: ICMP Packets. Darren Reed (Jun 03)
- Re: ICMP Packets. Don Kendrick (Jun 02)
- Re: ICMP Packets. Perry E. Metzger (Jun 02)
- Re: ICMP Packets. Alec Muffett - SunLabs (Jun 02)
- Re: ICMP Packets. James R Grinter (Jun 02)
- Re: ICMP Packets. Henry Hertz Hobbit (Jun 03)
- Re: ICMP Packets. Don Kendrick (Jun 02)
- Re: ICMP Packets. Perry E. Metzger (Jun 02)
- Re: ICMP Packets. Perry E. Metzger (Jun 03)
- Re: ICMP Packets. Bennett Todd (Jun 04)
- Re: ICMP Packets. Paul D. Robertson (Jun 05)
- Re: ICMP Packets. Don Kendrick (Jun 02)
- Re: ICMP Packets. Perry E. Metzger (Jun 03)
- Re: ICMP Packets. matthew green (Jun 04)
- Re: ICMP Packets. Bennett Todd (Jun 04)
- Re: ICMP Packets. Darren Reed (Jun 05)
- Re: ICMP Packets. tqbf (Jun 07)
- Re: ICMP Packets. Perry E. Metzger (Jun 03)
- Re: ICMP Packets. Henry Hertz Hobbit (Jun 02)