nanog mailing list archives
Re: The block message is 521 DNSRBL: Blocked for abuse
From: John Curran <jcurran () arin net>
Date: Tue, 24 Sep 2013 19:07:03 +0000
On Sep 24, 2013, at 7:58 AM, John Curran <jcurran () arin net> wrote:
On Sep 18, 2013, at 10:46 PM, Mark Andrews <marka () isc org> wrote:Which is irrelevent to removing a address block on the basis of a RIR recording that the block has been reallocated. A reallocation already goes through a quarantine period though that may get shorter as time goes on. A transfer on the other hand doesn't.Correct. A transfer is not an issuance of space, and could very easily be to a recipient related to the original party that caused the current reputation.
Okay, my apologies for supplying one piece of information which was not quite correct with respect to the above - A transfer which occurs due to merger or acquisition is simply the updating of the organization and/or contacts, and does not result in a new issue date, nor does it show up in the arin-issued feed as noted above. A sale (aka specified transfer) has a new issued date, and thus does appear in the arin-issued feed. It is still likely that these are to new parties but if an party operating a reputation service is concerned about the risk of "reputation washing via transfer", then they should monitor the list of specified transferred address blocks which is here: <https://www.arin.net/knowledge/statistics/transfers.html> Note also, there is more useful aspect of the arin-issued feed for those operating reputation services, and that is with respect to blocks returned to ARIN - Any blocks that come back to ARIN (whether reclaimed/revoked/recovered) are placed in hold status upon receipt. This hold period used to be one year, then was reduced to 6 months, is presently 3 months, and at ARIN IPv4 depletion will be just 1 one month per the ARIN IPv4 countdown plan: <https://www.arin.net/resources/request/ipv4_countdown.html. As blocks come out of held status, they are removed from assigned status and show up in the arin-issued report with the "Remove" keyword. At that point, these blocks are definitely safe to remove from any reputation history, as they are completely disassociated with the past resource holder and will be shortly issued anew to the next organization in queue. FYI, /John John Curran President and CEO ARIN
Current thread:
- Re: The block message is 521 DNSRBL: Blocked for abuse, (continued)
- Message not available
- Re: The block message is 521 DNSRBL: Blocked for abuse Andrew D Kirch (Sep 18)
- Re: The block message is 521 DNSRBL: Blocked for abuse David Miller (Sep 18)
- Re: The block message is 521 DNSRBL: Blocked for abuse Tammy Firefly (Sep 18)
- Re: The block message is 521 DNSRBL: Blocked for abuse Tammy Firefly (Sep 18)
- Re: The block message is 521 DNSRBL: Blocked for abuse staticsafe (Sep 18)
- Re: The block message is 521 DNSRBL: Blocked for abuse David Miller (Sep 18)
- Re: The block message is 521 DNSRBL: Blocked for abuse John Levine (Sep 18)
- Re: The block message is 521 DNSRBL: Blocked for abuse Andrew D Kirch (Sep 18)
- Re: The block message is 521 DNSRBL: Blocked for abuse Mark Andrews (Sep 18)
- Re: The block message is 521 DNSRBL: Blocked for abuse John Curran (Sep 24)
- Re: The block message is 521 DNSRBL: Blocked for abuse John Curran (Sep 24)
- RE: The block message is 521 DNSRBL: Blocked for abuse Frank Bulk (Sep 19)
- Re: The block message is 521 DNSRBL: Blocked for abuse William Herrin (Sep 24)
- Re: The block message is 521 DNSRBL: Blocked for abuse John Curran (Sep 25)