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Spoofing Information for AS 2497 (IIJ)

Spoofing status per IP block

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
Private
Spoof
Routable
49.239.64.x/242018-10-30 02:43:53 GMTblockedblocked
49.239.68.x/242019-05-31 02:18:27 GMTrewrittenrewritten
49.239.69.x/242019-09-30 05:32:02 GMTblockedblocked
124.41.83.x/242022-02-16 04:11:55 GMTrewrittenrewritten
124.41.93.x/242022-02-17 11:50:37 GMTrewrittenrewritten
124.147.70.x/242018-01-14 09:38:59 GMTunknownunknown
125.30.0.x/242022-06-14 23:41:06 GMTblockedblocked
125.30.1.x/242022-02-02 02:15:14 GMTblockedblocked
125.30.2.x/242021-07-31 14:49:17 GMTblockedblocked
125.30.4.x/242022-07-01 06:59:07 GMTblockedblocked
125.30.44.x/242017-09-06 12:34:59 GMTunknownunknown
125.30.48.x/242021-12-17 15:59:39 GMTblockedblocked
125.30.49.x/242022-08-26 03:31:53 GMTblockedblocked
125.30.50.x/242021-12-02 14:22:47 GMTblockedblocked
125.30.70.x/242021-12-12 05:37:17 GMTblockedblocked
125.30.72.x/242017-09-06 13:26:04 GMTunknownunknown
133.22.0.x/242018-01-26 01:08:53 GMTblockedblocked
133.22.1.x/242018-01-24 05:16:35 GMTblockedreceived
133.137.220.x/242019-07-03 21:28:01 GMTblockedblocked
150.31.20.x/242019-10-03 12:06:14 GMTrewrittenblocked
150.31.26.x/242022-09-24 18:01:28 GMTblockedblocked
150.31.27.x/242021-08-14 03:17:11 GMTblockedblocked
150.31.29.x/242017-09-15 05:20:29 GMTrewrittenrewritten
160.13.12.x/242018-12-13 04:22:44 GMTblockedblocked
160.13.84.x/242022-02-23 09:09:26 GMTblockedblocked
160.13.102.x/242022-01-10 08:29:21 GMTblockedblocked
160.13.105.x/242017-09-15 03:51:51 GMTunknownunknown
160.13.239.x/242017-08-08 11:12:38 GMTblockedblocked
163.49.201.x/242018-03-11 00:51:09 GMTunknownunknown
163.49.203.x/242018-02-05 10:18:32 GMTblockedblocked
163.49.212.x/242018-05-27 03:51:00 GMTblockedblocked
163.49.215.x/242019-08-30 05:19:36 GMTrewrittenrewritten
202.32.5.x/242020-01-06 01:47:25 GMTrewrittenrewritten
202.32.157.x/242019-12-03 06:51:27 GMTrewrittenrewritten
202.214.65.x/242019-08-19 04:33:20 GMTblockedblocked
202.214.86.x/242019-04-16 02:33:26 GMTblockedreceived
202.214.125.x/242018-06-02 03:24:48 GMTblockedblocked
202.214.230.x/242019-12-06 05:58:09 GMTblockedblocked
202.221.190.x/242019-08-30 00:04:02 GMTrewrittenrewritten
210.128.154.x/242020-01-26 10:30:58 GMTrewrittenblocked
210.138.104.x/242018-12-03 20:28:53 GMTrewrittenrewritten
210.138.208.x/242018-06-12 10:00:59 GMTblockedblocked
210.148.42.x/242018-11-21 00:21:55 GMTunknownunknown
210.149.253.x/242019-01-25 08:13:30 GMTrewrittenrewritten
210.173.24.x/242019-12-23 04:22:50 GMTblockedblocked
219.126.164.x/242020-08-17 05:02:00 GMTrewrittenrewritten
219.126.165.x/242019-02-11 07:43:21 GMTrewrittenrewritten
220.100.42.x/242020-03-17 04:22:07 GMTunknownrewritten
220.100.107.x/242018-05-18 15:31:16 GMTblockedblocked
220.210.146.x/242019-11-15 01:40:25 GMTblockedblocked
220.210.177.x/242018-06-15 03:17:40 GMTrewrittenrewritten
2001:240:1xx::/402020-10-16 06:04:13 GMTblockedblocked
2001:240:14xx::/402019-08-05 02:06:23 GMTblockedblocked
2001:240:1exx::/402018-01-26 01:08:53 GMTblockedblocked
2001:240:24xx::/402019-12-06 05:58:09 GMTblockedblocked

Customers of AS 2497 we have spoofer tests from

This is the list of directly connected customers of AS 2497 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 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
Recent
tests
Spoof
Routable
55904 (KOGAKUIN-AS)jpn (Japan)20AS 55904 testsblocked
8674 (NETNOD-IX)swe (Sweden)13627AS 8674 testsblocked
54825 (PACKET)usa (United States)24841AS 54825 testsblocked

Address Space Announcement History

The customer cone for 2497 is too large for a prefix list to be useful.

Last Modified