Logo

Session Report

Summary:
Test run at: 2021-08-04 12:13:44 GMT
Client Prefix (v4): 153.34.223.x/24
Client AS (v4): 4837 (CHINA169-Backbone)
IPv4 Probes: 66
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable rewritten
Largest spoofable neighbor prefix length none
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.

Warnings:

IPv4 AS Route:
This test run probed the following paths in order to infer your ability to send different spoofed source packets. Each node in the graph corresponds to an autonomous system, i.e. different Internet service providers. NOTE: This graph does NOT show if an AS blocks spoofed packets, only the path taken by received spoofed packets. The IP Path Details are available for this run. If non-spoofed packets weren't received at a destination, the traceroute to that destination is not included in this graph and may even cause a totally empty graph.

  

  

IPv4 Adjacent Netblock Testing:

Your host (153.34.223.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
153.34.223.x/24/314837rewritten
153.34.223.x/24/304837rewritten
153.34.223.x/24/294837rewritten
153.34.223.x/24/284837rewritten
153.34.223.x/24/274837rewritten
153.34.223.x/24/264837rewritten
153.34.223.x/24/254837rewritten
153.34.223.x/24/244837rewritten
153.34.222.x/24/234837rewritten
153.34.221.x/24/224837rewritten
153.34.219.x/24/214837rewritten
153.34.215.x/24/204837rewritten
153.34.207.x/24/194837rewritten
153.34.255.x/24/184837rewritten
153.34.159.x/24/174837rewritten
153.34.95.x/24/164837rewritten
153.35.223.x/24/154837rewritten
153.32.223.x/24/1414365rewritten
153.38.223.x/24/13701rewritten
153.42.223.x/24/12UNROUTEDrewritten
153.50.223.x/24/11UNROUTEDrewritten
153.2.223.x/24/1012217rewritten
153.98.223.x/24/9UNROUTEDrewritten
153.162.223.x/24/84713rewritten

Meaning of status in Received column:

rewrittenThe source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.

IPv4 Outbound Filtering Depth:

The tracefilter test found your host able to spoof routable, non-adjacent source addresses through the first 9 IP hop(s).
Summary:
The results from all tests are aggregated to produce a summary "State of IP Spoofing" report.
Feedback:
We welcome questions and feedback to the Spoofer Information Mailing List and invite users to join the Spoofer Users Mailing List for discussion and announcements.
Last Modified