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Session Report

Summary:
Test run at: 2022-05-17 18:35:45 GMT
Client Prefix (v4): 197.250.8.x/24
Client AS (v4): 36908 (VTL-ASN)
IPv4 Probes: 60
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 unknown
Routable unknown
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 (197.250.8.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
197.250.8.x/24/3136908natblock
197.250.8.x/24/3036908natblock
197.250.8.x/24/2936908natblock
197.250.8.x/24/2836908natblock
197.250.8.x/24/2736908natblock
197.250.8.x/24/2636908natblock
197.250.8.x/24/2536908natblock
197.250.8.x/24/2436908natblock
197.250.9.x/24/2336908natblock
197.250.10.x/24/2236908natblock
197.250.12.x/24/2136908natblock
197.250.0.x/24/2036908natblock
197.250.24.x/24/1936908natblock
197.250.40.x/24/1836908natblock
197.250.72.x/24/1736908natblock
197.250.136.x/24/1636908natblock
197.251.8.x/24/1537197natblock
197.248.8.x/24/1437061natblock
197.254.8.x/24/1315808natblock
197.242.8.x/24/1237390natblock
197.234.8.x/24/1136902natblock
197.218.8.x/24/1037342natblock
197.186.8.x/24/937133natblock
197.122.8.x/24/836992natblock

Meaning of status in Received column:

natblockSpoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.

IPv4 Outbound Filtering Depth:

The tracefilter test found your host able to spoof routable, non-adjacent source addresses through the first 10 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.
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