In a message written on Mon, Jun 20, 2011 at 08:06:44AM -0500, Jason Baugher wrote:
Did everyone miss that the customer didn't request a /24, they requested a "/24s worth in even more dis-contiguous blocks". I can only think of one reason why a customer would specifically ask for that. They are concerned that they'll get blacklisted. They're hoping if they do, it will be a small block of many rather than one entire block.
+1 Almost every customer I've dealt with who requested such a thing eventually ended up having their contract terminated for spamming. Many of the RBL's chose to increase the size of their blocks to put more pressure on ISP's. So if you give them /29's in 10 different blocks they will block the /24 in each, then a /23 in each, and so on. Basically this becomes a quick way for you to get 100% of your address space blocked, and make the rest of your customers really unhappy. When the RBL's see you gave them a bunch of small blocks in different supernets they assume you are spammer friendly. -- Leo Bicknell - bicknell@ufp.org - CCIE 3440 PGP keys at http://www.ufp.org/~bicknell/