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Session Report

Summary:
Test run at: 2019-09-25 16:55:13 GMT
Client Prefix (v4): 138.121.38.x/24
Client AS (v4): 264279
IPv4 Probes: 72
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
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.
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 (138.121.38.x/24) can spoof 1023 neighboring addresses (within your /22 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
138.121.38.x/24/31264279no
138.121.38.x/24/30264279no
138.121.38.x/24/29264279yes
138.121.38.x/24/28264279yes
138.121.38.x/24/27264279yes
138.121.38.x/24/26264279yes
138.121.38.x/24/25264279yes
138.121.38.x/24/24264279yes
138.121.39.x/24/23264279yes
138.121.36.x/24/22264279yes
138.121.34.x/24/21264288no
138.121.46.x/24/20264280no
138.121.54.x/24/19264281no
138.121.6.x/24/1861499no
138.121.102.x/24/17263775no
138.121.166.x/24/16UNROUTEDno
138.120.38.x/24/158983no
138.123.38.x/24/1416657no
138.125.38.x/24/13UNROUTEDno
138.113.38.x/24/12UNROUTEDno
138.105.38.x/24/11UNROUTEDno
138.89.38.x/24/10701no
138.57.38.x/24/9UNROUTEDno
138.249.38.x/24/8UNROUTEDno

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 able to spoof routable, non-adjacent source addresses through the first 2 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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