Re: ECN: Clearing the air (fwd)

[Alex Pennace]

On Mon, Jan 29, 2001 at 02:26:51PM -0500, George wrote:
> On Mon, 29 Jan 2001, Albert D. Cahalan wrote:
> >The author is expressing his wish for an ideal world. Note that he
> >also accepts reality. He accepts that PMTU black holes won't go
> >away, even though we might like them to do so.
> >
> >Hell, I think I'm behind one. ICMP is/was blocked to/from/within
> >the entire university. This was to stop ping flood attacks. :-)
> 
> So you get a UDP flood instead.
> 
> Congratulations on breaking something important (PMTU, "Port unreachable",
> etc.) for a false sense of security.

Your praise should be directed to UML telecommunications.

> Did you buy a non-upgraded Cisco PIX just to block ECN as well?

I wouldn't doubt it, but I haven't tested it on this network.