[NLNOG] Spoofer Report for NLNOG for Dec 2025

[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 Dec 2025:
ASN    Name                                           Fixed-By
207176 OPENFIBER                                      2025-12-14

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

Source Address Validation issues inferred during Dec 2025:
ASN    Name                           First-Spoofed Last-Spoofed
28685  ASN-ROUTIT                        2017-03-26   2025-12-22
33915  TNF                               2019-01-28   2025-12-15
39647  REDHOSTING                        2019-12-02   2025-12-24
207176 OPENFIBER                         2022-09-30   2025-12-10
3920   IMS-RTFM                          2023-10-06   2025-12-26
35316  PRODACOM                          2025-12-17   2025-12-31

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