[NLNOG] Spoofer Report for NLNOG for May 2026

[CAIDA Spoofer Project]

In response to feedback from operational security communities,
CAIDA's source address validation measurement project
(https://spoofer.caida.org) is automatically generating monthly
reports of ASes originating prefixes in BGP for systems from which
we received packets with a spoofed source address.
We are publishing these reports to network and security operations
lists in order to ensure this information reaches operational
contacts in these ASes.

This report summarises tests conducted within nld.

Inferred improvements during May 2026:
ASN    Name                                           Fixed-By
39647  REDHOSTING                                     2026-05-01
213293                                                2026-05-04

Further information for the inferred remediation is available at:
https://spoofer.caida.org/remedy.php

Source Address Validation issues inferred during May 2026:
ASN    Name                           First-Spoofed Last-Spoofed
28685  ASN-ROUTIT                        2017-03-26   2026-05-18
39647  REDHOSTING                        2019-12-02   2026-05-26
3920   IMS-RTFM                          2023-10-06   2026-05-30
35316  PRODACOM                          2025-12-17   2026-05-29
60781  LEASEWEB-NL-AMS-01                2026-02-08   2026-05-31
906                                      2026-03-14   2026-05-30
32519  DMITI-SERVICES                    2026-03-28   2026-05-30
6206   PARK-3                            2026-04-30   2026-05-28

Further information for these tests where we received spoofed
packets is available at:
https://spoofer.caida.org/recent_tests.php?country_include=nld&no_block=1

Please send any feedback or suggestions to spoofer-info at caida.org