[RACI-list] [manrs-community] Routine Monitoring of Source Address Validation Deployment by Operators

Excelente iniciativa, desde já me disponho juntamente com a PJM Net (
AS266152) a ajudar no que estiver ao nosso alcance, assim como tambem
consigo disponibilizar a VM necessária.

Em sex., 26 de abr. de 2024 às 12:32, Brandon Zhi <Brandon at huize.asia>
escreveu:

> Dear MANRS and RIPE members,
>
> My name is Gaoxing Zhang, and I am a computer enthusiast from the High
> School Competition Team at Hangzhou Dongfang High School.
>
> Recently, I've observed that although MANRS requirements mandate Source
> Address Validation(SAV) for its members, some operators have not fully
> implemented this practice in their networks. Therefore, I propose to
> routinely monitor the deployment status of SAV across ASNs to ensure
> compliance with MANRS guidelines and enhance network security. I am
> currently unaware of any existing projects with a similar focus.
>
> It has come to my attention that operators at IXP facilities, even
> including major entities like Google, fail to enable SAV. This issue also
> persists in-home broadband services obtained through PPPoE, which could
> lead to Infected Home Routers becoming sources of DDoS Attacks and Are
> Difficult to Trace. In my tests, I announced my IP thought tunnel on a
> different operator’s network and configured the Next-hop Address to a home
> broadband gateway obtained via PPPoE. The results indicated that Source
> Address Validation by China Telecom’s home broadband is only partially
> implemented in Mainland China, with most IP addresses from the region being
> accessible through this method.
>
> Here are some methods I have considered for ongoing monitoring:
>
> 1. Announce a new IP block upstream to receive inbound traffic.
> 2. Deploy a tunnel on the device connected to the ISP being tested, which
> will link to the upstream receiving the inbound traffic.
> 3. The IP block will not be announced to the ISP being tested but only to
> the upstream used to receive inbound traffic. Check the connectivity to
> major public DNS servers when the Next-hop address is set to the ISP being
> tested.
> 4. If it is reachable, it indicates that the ISP’s device lacks Source
> Address Validation.
>
> I plan to deploy test equipment at major IXPs (currently seeking equipment
> sponsors) and access points for some residential ISPs (with the assistance
> of volunteers). The testing environment will be a Linux-based VM, utilizing
> Python to switch Next-hop based on test targets and assess the
> accessibility to major public DNS servers, as well as to upload data to a
> backend system.
>
> I would really appreciate it if you could share your valuable suggestions
> or feedback on this initiative.
>
> Best regards,
> *Brandon Zhang*
> HUIZE LTD
> www.huize.asia  <https://huize.asia/>| www.ixp.su | Twitter
>
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