That makes sense! They could have used your one paragraph and skipped their
lengthy email, plus all the web pages I looked up and just repeated
themselves.
I know that in our systems, we have no references to 173.x.x.x. However, we
do have a managed router from our upstream ISP. So the blockage is likely
there. Or else it's further upstream in the ISP. Either way, I just need
to let them know that it's their problem.
Thanks very much,
Ben
----- Original Message -----
From: "Sanford Whiteman" <[EMAIL PROTECTED]>
To: "Imail Admin" <[email protected]>
Sent: Thursday, December 04, 2008 12:00 PM
Subject: Re: [IMail Forum] OT: what's a bogon?
This is off-topic, but we got this message (see below) regarding a
web site we host. I can't make heads or tails of it. I search the
web and looked at the relevant explanations and they still don't
make sense. It's one of those things where if you already understand
it, what you're saying makes sense. But if you don't already
understand it, you're not going to learn. Can anyone explain it to
me?
Mediacom has begun allocating IPs in 173.0.0.0/8 to its customers.
At least one of your upstream routers has that source network blocked
as known-bogus -- which it was until early this year, when IANA freed
it up for use by Mediacom and other providers.
Legitimate traffic can now originate from that network, but the
routers in question are not getting dynamic updates to the bogon list.
They are still stuck with a list that predates the Feb 2008
"legitimization" of that network. So they still block the traffic
based on having an illegitimate source.
The question is, as BC Web, do you maintain your own routing equipment
all the way up the line to the Net at large -- or do you get your
uplink from a datacenter or ISP, with a managed router? The answer
will determine who has to fix the router(s).
--Sandy
------------------------------------
Sanford Whiteman, Chief Technologist
Broadleaf Systems, a division of
Cypress Integrated Systems, Inc.
e-mail: [EMAIL PROTECTED]
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