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Session Report

Summary:
Test run at: 2022-02-28 09:27:06 GMT
Client Prefix (v4): 138.4.3.x/24
Client AS (v4): 766 (RedIRIS)
IPv4 Probes: 60
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length /25
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.
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 (138.4.3.x/24) can spoof 127 neighboring addresses (within your /25 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
138.4.3.x/24/31766yes
138.4.3.x/24/30766yes
138.4.3.x/24/29766yes
138.4.3.x/24/28766yes
138.4.3.x/24/27766yes
138.4.3.x/24/26766yes
138.4.3.x/24/25766yes
138.4.3.x/24/24766no
138.4.2.x/24/23766no
138.4.1.x/24/22766no
138.4.7.x/24/21766no
138.4.11.x/24/20766no
138.4.19.x/24/19766no
138.4.35.x/24/18766no
138.4.67.x/24/17766no
138.4.131.x/24/16766no
138.5.3.x/24/157046no
138.6.3.x/24/1438956no
138.0.3.x/24/13264524no
138.12.3.x/24/1232472no
138.20.3.x/24/11UNROUTEDno
138.36.3.x/24/10264562no
138.68.3.x/24/914061no
138.132.3.x/24/83269no

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)

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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