Spoofing Information for AS 28283

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
187.103.248.x/24	2023-12-04 01:59:03 GMT	rewritten		rewritten

Customers of AS 28283 we have spoofer tests from

This is the list of directly connected customers of AS 28283 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
262381	bra (Brazil)	2	0	AS 262381 tests	received
268593	bra (Brazil)	4	1	AS 268593 tests	received
264216	bra (Brazil)	20	7	AS 264216 tests	received
263018	bra (Brazil)	2	0	AS 263018 tests	blocked
266439	bra (Brazil)	2	0	AS 266439 tests	blocked
268999	bra (Brazil)	2	0	AS 268999 tests	blocked
263486	bra (Brazil)	5	0	AS 263486 tests	blocked
271247	bra (Brazil)	7	2	AS 271247 tests	blocked
265198	bra (Brazil)	24	9	AS 265198 tests	blocked

Address Space Announcement History

The customer cone for 28283 is too large for a prefix list to be useful.