Spoofing Information for AS 14840

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
200.143.73.x/242023-07-21 21:28:35 GMTrewrittenrewritten
200.143.74.x/242023-10-31 18:32:52 GMTblockedblocked

Customers of AS 14840 we have spoofer tests from

This is the list of directly connected customers of AS 14840 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
268608bra (Brazil)20AS 268608 testsreceived
262567bra (Brazil)125AS 262567 testsreceived
28210bra (Brazil)113435AS 28210 testsreceived
270812bra (Brazil)20AS 270812 testsblocked
262891bra (Brazil)30AS 262891 testsblocked
268207bra (Brazil)41AS 268207 testsblocked
28300bra (Brazil)124AS 28300 testsblocked
52999bra (Brazil)176AS 52999 testsblocked
53153bra (Brazil)238AS 53153 testsblocked
6568bol (Bolivia)3718AS 6568 testsblocked
262773bra (Brazil)6914AS 262773 testsblocked
11845 (Vox-Telecom)zaf (South Africa)22811AS 11845 testsblocked
13335 (CLOUDFLARENET)tur (Turkey)315352505AS 13335 testsblocked

Address Space Announcement History

The customer cone for 14840 is too large for a prefix list to be useful.

Last Modified