Spoofing Information for AS 271253

Spoofing status per IP block for last year of data

(Results for all dates also available.)

Spoof status key
received		Spoofed packet was received.	✔	Pattern of tests from this IP block indicates a switch from allowing spoofing to blocking it.
rewritten		Spoofed packet was received, but the source address was changed en route.
blocked		Spoofed packet was not received, but unspoofed packet was.
unknown		Neither spoofed nor unspoofed packet was received.

IP block	Latest test	Spoof Private		Spoof Routable
2804:2178:xx::/40	2023-11-30 10:29:38 GMT	✔	blocked	received

Customers of AS 271253 we have spoofer tests from

This is the list of directly connected customers of AS 271253 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.

ASN	Country	Number of Prefixes in Customer Cone	Number of ASes in Customer Cone	Recent tests	Spoof Routable
264237	bra (Brazil)	3	0	AS 264237 tests	received
52873	bra (Brazil)	951	369	AS 52873 tests	received
61686	bra (Brazil)	1	0	AS 61686 tests	blocked
270750	bra (Brazil)	2	0	AS 270750 tests	blocked
262535	bra (Brazil)	6	0	AS 262535 tests	blocked
268235	bra (Brazil)	91	43	AS 268235 tests	blocked
13335 (CLOUDFLARENET)	vnm (Vietnam)	27499	2131	AS 13335 tests	blocked

Address Space Announcement History

The customer cone for 271253 is too large for a prefix list to be useful.