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Session Report

Summary:
Test run at: 2021-07-19 11:33:59 GMT
Client Prefix (v4): 177.22.248.x/24
Client AS (v4): 262773
IPv4 Probes: 66
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable received
Largest spoofable neighbor prefix length /22
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 (177.22.248.x/24) can spoof 1023 neighboring addresses (within your /22 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
177.22.248.x/24/31262773yes
177.22.248.x/24/30262773yes
177.22.248.x/24/29262773yes
177.22.248.x/24/28262773yes
177.22.248.x/24/27262773yes
177.22.248.x/24/26262773yes
177.22.248.x/24/25262773yes
177.22.248.x/24/24262773yes
177.22.249.x/24/23262773yes
177.22.250.x/24/22262773yes
177.22.252.x/24/21262357rewritten
177.22.240.x/24/2028264rewritten
177.22.232.x/24/19262669rewritten
177.22.216.x/24/18262902rewritten
177.22.184.x/24/17263563rewritten
177.22.120.x/24/16263432rewritten
177.23.248.x/24/15262906rewritten
177.20.248.x/24/1453240rewritten
177.18.248.x/24/1318881rewritten
177.30.248.x/24/1226615rewritten
177.6.248.x/24/118167rewritten
177.54.248.x/24/10262299rewritten
177.86.248.x/24/9262644rewritten
177.150.248.x/24/826615rewritten

Meaning of status in Received column:

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