Spoofing Information for AS 4230

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
189.3.177.x/242023-02-28 20:24:26 GMTblockedblocked
189.16.122.x/242023-10-03 15:54:04 GMTblockedreceived
189.42.147.x/242023-06-02 03:33:51 GMTrewrittenrewritten
189.52.136.x/242023-04-25 16:56:25 GMTblockedreceived
191.56.246.x/242023-12-01 00:06:31 GMTrewrittenrewritten
191.56.247.x/242023-11-10 12:19:37 GMTrewrittenrewritten
191.57.23.x/242023-06-15 21:05:58 GMTrewrittenrewritten
191.57.27.x/242023-04-26 14:57:57 GMTrewrittenrewritten
191.57.28.x/242023-08-11 16:03:53 GMTblockedblocked
191.57.161.x/242023-12-07 17:24:05 GMTrewrittenrewritten
191.57.165.x/242023-11-04 19:19:58 GMTrewrittenrewritten
191.57.168.x/242023-09-10 13:23:45 GMTrewrittenrewritten
191.57.169.x/242023-09-16 17:40:13 GMTrewrittenrewritten
191.57.177.x/242023-05-30 21:28:07 GMTrewrittenrewritten
191.57.188.x/242023-08-27 15:18:43 GMTrewrittenrewritten
191.57.216.x/242023-06-19 18:40:43 GMTrewrittenrewritten
191.57.219.x/242023-07-20 19:45:06 GMTrewrittenrewritten
191.58.68.x/242023-10-06 08:50:17 GMTrewrittenrewritten
191.58.70.x/242023-10-18 20:23:56 GMTrewrittenrewritten
191.58.77.x/242023-11-01 23:21:09 GMTrewrittenrewritten
200.166.195.x/242023-12-03 20:06:01 GMTblockedblocked
200.173.84.x/242023-12-04 12:14:01 GMTrewrittenrewritten
200.173.85.x/242023-12-06 14:09:58 GMTrewrittenrewritten
200.173.87.x/242023-04-24 13:16:28 GMTrewrittenrewritten
200.173.163.x/242023-08-07 20:55:02 GMTrewrittenrewritten
200.173.165.x/242023-08-04 00:56:18 GMTrewrittenrewritten
200.173.183.x/242023-10-02 17:25:57 GMTrewrittenrewritten
200.173.196.x/242023-09-08 13:08:42 GMTrewrittenrewritten
200.173.208.x/242023-03-16 20:08:22 GMTrewrittenrewritten
200.173.213.x/242023-02-26 19:48:23 GMTrewrittenrewritten
200.173.215.x/242023-12-04 16:51:14 GMTrewrittenrewritten
200.173.220.x/242023-06-30 00:08:01 GMTrewrittenrewritten
200.173.227.x/242023-02-08 15:05:34 GMTrewrittenrewritten
200.173.243.x/242023-05-19 14:08:52 GMTrewrittenrewritten
200.173.244.x/242023-04-24 19:03:39 GMTrewrittenrewritten
200.173.249.x/242023-03-10 18:39:40 GMTrewrittenrewritten
200.173.251.x/242023-07-01 15:19:28 GMTrewrittenrewritten
200.178.86.x/242023-06-02 16:49:59 GMTblockedblocked
200.250.59.x/242023-12-08 20:18:04 GMTblockedblocked

Customers of AS 4230 we have spoofer tests from

This is the list of directly connected customers of AS 4230 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
266178bra (Brazil)155AS 266178 testsreceived
266475bra (Brazil)187AS 266475 testsreceived
28210bra (Brazil)114334AS 28210 testsreceived
268437bra (Brazil)41AS 268437 testsblocked
22085bra (Brazil)100AS 22085 testsblocked
263661bra (Brazil)2511AS 263661 testsblocked
23106bra (Brazil)1085448AS 23106 testsblocked
53181bra (Brazil)1335125AS 53181 testsblocked
28573bra (Brazil)13844AS 28573 testsblocked

Address Space Announcement History

The customer cone for 4230 is too large for a prefix list to be useful.

Last Modified