On Thu, Apr 20, 2000 at 11:29:48PM -0400, Theodore Y. Ts'o wrote:
The problem with this comes with, as I mentioned earlier, bone-headed
firewall maintainers who believe that all ICMP packets are bad and
filters all of them.
It need not be a firewall -- often people use packet filtering
techniques built into most routers to achieve the same thing
(actually, it's a horrible hack and a really bad idea, but that
doesn't stop plenty of people doing so).
As best as I can tell, dri.sourceforget.net and support.3com.com do
_not_ block ICMP packets -- www.amazon.com appears to have them
getting dumped by a cisco router upstream of the host.
There are a couple of solutions you can use to solve this problem. One
is to ask nicely to the web site administrators that they fix their
firewall.
It need not be at the web-site end, and it this case, I suspect it
may not be. It could be anywhere in between...
-cw
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This archive was generated by hypermail 2b29 : Sun Apr 23 2000 - 21:00:18 EST