Spoofing Information for AS 16735

Spoofing status per IP block for last year of data

(Results for all dates also available.)
Spoof status key
receivedSpoofed packet was received.Pattern of tests from this IP block indicates a switch from allowing spoofing to blocking it.
rewrittenSpoofed packet was received, but the source address was changed en route.
blockedSpoofed packet was not received, but unspoofed packet was.
unknownNeither spoofed nor unspoofed packet was received.
IP blockLatest testSpoof
177.69.45.x/242023-10-20 12:09:40 GMTrewrittenrewritten
187.32.67.x/242023-06-30 14:42:41 GMTreceivedreceived
187.32.77.x/242023-09-30 06:59:20 GMTreceivedreceived
187.32.78.x/242023-12-01 02:22:46 GMTreceivedreceived
187.72.115.x/242023-08-11 13:55:38 GMTblockedblocked
187.72.119.x/242023-04-25 20:33:27 GMTreceivedreceived
200.233.137.x/242023-06-12 22:39:10 GMTrewrittenreceived
201.16.250.x/242023-05-25 03:32:48 GMTrewrittenreceived
201.48.114.x/242023-10-16 18:10:43 GMTblockedblocked

Customers of AS 16735 we have spoofer tests from

This is the list of directly connected customers of AS 16735 from which we have received a spoofer test, ordered by the customer's ability to send spoofed packets and the number of prefixes of an inferred ingress ACL derived from prefix announcements for the customer recorded in the latest month of public BGP data. BCP-84 describes ingress ACLs as "the most bulletproof solution when done properly" and the "best fit ... when the configuration is not too dynamic, ... if the number of used prefixes is low." Further detail about the size and dynamism of an inferred ACL is available by following the History link for each AS.

ASNCountryNumber of Prefixes
in Customer Cone
Number of ASes
in Customer Cone
266248bra (Brazil)61AS 266248 testsreceived
262765bra (Brazil)123AS 262765 testsreceived
267642bra (Brazil)125AS 267642 testsreceived
263569bra (Brazil)193AS 263569 testsreceived
25933bra (Brazil)434130AS 25933 testsreceived
53087bra (Brazil)1332408AS 53087 testsreceived
52649bra (Brazil)10AS 52649 testsblocked
264152bra (Brazil)20AS 264152 testsblocked
265279bra (Brazil)30AS 265279 testsblocked
262691bra (Brazil)80AS 262691 testsblocked
28171bra (Brazil)238AS 28171 testsblocked
21574bra (Brazil)1029457AS 21574 testsblocked
53181bra (Brazil)1374128AS 53181 testsblocked
262287bra (Brazil)2668213AS 262287 testsblocked
396356 (MAXIHOST)usa (United States)3297230AS 396356 testsblocked
13335 (CLOUDFLARENET)bra (Brazil)315352505AS 13335 testsblocked

Address Space Announcement History

The customer cone for 16735 is too large for a prefix list to be useful.

Last Modified