Note: The results presented in this report are based on a few assumptions. Therefore, please keep in mind that the list of filtering ASes shown here might not be absolutely accurate or complete. For more information on the assumptions and how the report is compiled, please read below.
Summary
IPv4
Anchor Prefix: 84.205.83.0/24 Size of set: 144 ASes
The anchor and debogon prefixes are announced by the same router (RRC3) and AS number (AS12654). The AS-path from any point on the Internet towards the announcing router should therefore be the same for both prefixes. If this is not the case, it is assumed that debogon prefix filtering is being applied somewhere on the path.
The collection points of the AS-paths used in this report are all the RIS RRCs. Therefore, ASes covered in this report are only those seen in the AS-paths between the collection points and the anchor prefix.
To perform this report, all the AS-paths towards the anchor and the debogon prefixes are compared:
ASes appearing on matching anchor and debogon paths are labelled non-filtering.
From the unmatching AS-paths, all ASes labeled as non-filtering are removed, generating a list of AS-path segments.
If a segment consists of only one AS, the AS is labelled filtering.
All remaining ASes are labelled uncertain.
If an AS is labelled uncertain, it means that it is part of an AS-path segment in which at least one AS is considered to be filtering, but it is unconclusive which one(s).
The visibility plots show the percentage of how many ASes are estimated to be non-filtering. The grey area represents the indeterminacy caused by the ASes considered uncertain.
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- Non-filtering
- Filtering
- Uncertain (part of a filtering AS-path segment)