Firewall Wizards mailing list archives
Re: A fun smackdown...
From: "Steven M. Bellovin" <smb () cs columbia edu>
Date: Sat, 21 May 2005 15:51:44 -0400
In message <6.2.0.14.2.20050520220022.0712ea20 () mail ranum com>, "Marcus J. Ranu m" writes:
How about excessive ICMP filtering breaking path MTU discovery?Another perfect example of a bunch of egg-heads in the IETF coming up with a mechanism for doing something that completely ignored existing implementations of security systems - and breaks as a result. The PMTU discovery mechanism, using ICMP, was moronic design from the get-go.
Path MTU was standardized in RFC 1191, from November 1990. Virtually no one had firewalls back then. It didn't "ignore existing implementations of security systems" because there were almost none. --Steven M. Bellovin, http://www.cs.columbia.edu/~smb _______________________________________________ firewall-wizards mailing list firewall-wizards () honor icsalabs com http://honor.icsalabs.com/mailman/listinfo/firewall-wizards
Current thread:
- Re: A fun smackdown..., (continued)
- Re: A fun smackdown... Paul D. Robertson (May 19)
- Re: A fun smackdown... Marcus J. Ranum (May 20)
- Re: A fun smackdown... Chuck Swiger (May 21)
- Re: A fun smackdown... Marcus J. Ranum (May 21)
- Re: A fun smackdown... Chuck Swiger (May 21)
- Re: A fun smackdown... Marcus J. Ranum (May 21)
- Re: A fun smackdown... Chuck Swiger (May 21)
- Re: A fun smackdown... Adam Shostack (May 21)
- Re: A fun smackdown... Ryan McBride (May 21)
- Re: A fun smackdown... Marcus J. Ranum (May 21)
- Re: A fun smackdown... Steven M. Bellovin (May 21)
- Re: A fun smackdown... Marcus J. Ranum (May 21)
- Re: A fun smackdown... Don Kendrick (May 24)
- Re: A fun smackdown... Paul D. Robertson (May 19)
- Re: A fun smackdown... Chuck Swiger (May 19)
- Re: A fun smackdown... Paul D. Robertson (May 19)
- Re: A fun smackdown... Chuck Swiger (May 19)
- Re: A fun smackdown... Paul D. Robertson (May 19)
- Re: A fun smackdown... Marcus J. Ranum (May 20)
- Re: A fun smackdown... Chuck Swiger (May 21)
- Re: A fun smackdown... Marcus J. Ranum (May 21)