RE: for folks tracking DDOS sources or reading the GRC attack log
On Mon, Jun 25, 2001 at 04:54:12PM -0700, Mike Batchelor wrote:
24.0/8 is the "cable block".
No it's not. Check out 24.132/14 for instance.
IANA and ARIN seem to think it is... Check out: http://www.iana.org/assignments/network-24 The "Network 24 - Cable Block" will link to the following text: Internet Assigned Numbers Authority (IANA) Date: May 11, 2001 The IANA has completed the administrative transfer of responsibility for 24.0.0.0 - 24.255.255.255 (Cable Block) to the American Regional Internet Registry (ARIN). Questions or Whois information for this 24/8 block should be directed to ARIN <www.arin.net>. I'm sure a few legacy allocations in 24/8 space will happen to slip through...
Nearly all the cable operators have one slice or another from this block.
Perhaps this is true in the US.
Nearly all North American cable modems users have address space in this block.
No they don't.
Well since I don't think you can argue Canadian cable modems follow different patterns, you seem to have contradicted yourself...
Ran rja@inet.org
Didja ever have a bad hair day, when you just felt like being contrary for the hell of it?
You think thats funny, until Extreme switchs starts shipping with your IP null routed by default... :P -- Richard A Steenbergen <ras@e-gerbil.net> http://www.e-gerbil.net/ras PGP Key ID: 0x138EA177 (67 29 D7 BC E8 18 3E DA B2 46 B3 D8 14 36 FE B6)
[ On Monday, June 25, 2001 at 20:12:11 (-0400), Richard A. Steenbergen wrote: ]
Subject: RE: for folks tracking DDOS sources or reading the GRC attack log
Well since I don't think you can argue Canadian cable modems follow different patterns, you seem to have contradicted yourself...
Well, I can argue that some Canadian cable modems do follow different patterns. Although GT are absolutely terrible at maintaining their network assignments, I know for a fact that chunks of both GROUPTELECOM-BLK-5A and GROUPTELECOM-BLK-6A are assigned to operating cable modems. I'm also fairly certain that when the cable provider I refer to finally gets their own assignment from ARIN that it won't likely be from 24/8 (though it might -- it's anyone's guess at this point since I don't the application has even been made yet). Then of course there's NETBLK-GTE-CABLE-DUKE-ADSL. Is that an oxymoron, or just an example of a contradiction to your argument? Making assumptions about the type of last-mile connection in use by some IP address based solely on its classical prefix (eg. 24/0) is just never going to be accurate. Making assumptions about where a classical prefix is routed geographically is going to get you in real trouble. From what I can see 24/8 can be found on many continents, never mind in many countries. -- Greg A. Woods +1 416 218-0098 VE3TCP <gwoods@acm.org> <woods@robohack.ca> Planix, Inc. <woods@planix.com>; Secrets of the Weird <woods@weird.com>
On Mon, 25 Jun 2001, Richard A. Steenbergen wrote:
On Mon, Jun 25, 2001 at 04:54:12PM -0700, Mike Batchelor wrote:
24.0/8 is the "cable block".
No it's not. Check out 24.132/14 for instance.
and 24.192/14
IANA and ARIN seem to think it is... Check out: http://www.iana.org/assignments/network-24
24/8 has been used by all 3 RIRs to make assignments to cable modems in times past. Recent events have lead to the non-ARIN parts of 24/8 being taken up by ARIN, in addition to the non-allocated-to-a-RIR parts of 24/8. Updates to various databases will simply take a bit of time, thats all. --==-- Bruce.
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Bruce Campbell -
Richard A. Steenbergen -
woods＠weird.com