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Session Report

Summary:
Test run at: 2021-11-01 10:40:35 GMT
Client Prefix (v4): 148.75.183.x/24
Client AS (v4): 6128 (CABLE-NET-1)
IPv4 Probes: 66
Client Prefix (v6): 2001:470:1fxx::/40
Client AS (v6): 6939 (HURRICANE)
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable received
Largest spoofable neighbor prefix length none

Meaning of result status in column:

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 (148.75.183.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
148.75.183.x/24/316128rewritten
148.75.183.x/24/306128rewritten
148.75.183.x/24/296128rewritten
148.75.183.x/24/286128rewritten
148.75.183.x/24/276128rewritten
148.75.183.x/24/266128sendto
148.75.183.x/24/256128sendto
148.75.183.x/24/246128sendto
148.75.182.x/24/236128sendto
148.75.181.x/24/226128sendto
148.75.179.x/24/216128sendto
148.75.191.x/24/206128sendto
148.75.167.x/24/196128sendto
148.75.151.x/24/186128sendto
148.75.247.x/24/176128sendto
148.75.55.x/24/166128sendto
148.74.183.x/24/156128sendto
148.73.183.x/24/1418642sendto
148.79.183.x/24/13786sendto
148.67.183.x/24/129605sendto
148.91.183.x/24/11UNROUTEDsendto
148.107.183.x/24/10UNROUTEDsendto
148.11.183.x/24/9749sendto
148.203.183.x/24/83810sendto

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.
sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.

IPv4 Outbound Filtering Depth:

The tracefilter test found your host unable to spoof routable, non-adjacent source addresses through even the first IP hop.
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.
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