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Session Report

Summary:
Test run at: 2021-08-24 19:12:31 GMT
Client Prefix (v4): 167.250.203.x/24
Client AS (v4): 265226
IPv4 Probes: 66
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable received
Largest spoofable neighbor prefix length /10

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 (167.250.203.x/24) can spoof 4194303 neighboring addresses (within your /10 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
167.250.203.x/24/31265226yes
167.250.203.x/24/30265226yes
167.250.203.x/24/29265226yes
167.250.203.x/24/28265226yes
167.250.203.x/24/27265226yes
167.250.203.x/24/26265226natblock
167.250.203.x/24/25265226natblock
167.250.203.x/24/24265226natblock
167.250.202.x/24/23265226natblock
167.250.201.x/24/22265226yes
167.250.207.x/24/21262253yes
167.250.195.x/24/20264654yes
167.250.219.x/24/19265224yes
167.250.235.x/24/18265211yes
167.250.139.x/24/1728598yes
167.250.75.x/24/16265197yes
167.251.203.x/24/1514946yes
167.248.203.x/24/1430404yes
167.254.203.x/24/1316831yes
167.242.203.x/24/1230356yes
167.234.203.x/24/113525yes
167.218.203.x/24/103136yes
167.186.203.x/24/9UNROUTEDnatblock
167.122.203.x/24/8UNROUTEDnatblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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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