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Session Report

Summary:
Test run at: 2023-12-16 02:11:16 GMT
Client Prefix (v4): 38.156.93.x/24
Client AS (v4): 272137
IPv4 Probes: 69
Client Prefix (v6): 2803:6090:xx::/40
Client AS (v6): 272137
IPv6 Probes: 60
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenreceived
Routable receivedreceived
Largest spoofable neighbor prefix length none/16
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 (38.156.93.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
38.156.93.x/24/31272137rewritten
38.156.93.x/24/30272137rewritten
38.156.93.x/24/29272137rewritten
38.156.93.x/24/28272137rewritten
38.156.93.x/24/27272137rewritten
38.156.93.x/24/26272137rewritten
38.156.93.x/24/25272137rewritten
38.156.93.x/24/24272137rewritten
38.156.92.x/24/23272137rewritten
38.156.95.x/24/22151006rewritten
38.156.89.x/24/21272943rewritten
38.156.85.x/24/20174rewritten
38.156.77.x/24/19174rewritten
38.156.125.x/24/18174rewritten
38.156.29.x/24/17174rewritten
38.156.221.x/24/1654936rewritten
38.157.93.x/24/15174rewritten
38.158.93.x/24/14272867rewritten
38.152.93.x/24/1355286rewritten
38.148.93.x/24/12174rewritten
38.140.93.x/24/1111272rewritten
38.188.93.x/24/10174rewritten
38.220.93.x/24/9174rewritten
38.28.93.x/24/8174rewritten

Meaning of status in Received column:

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).
IPv6 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.

  

  
IPv6 probes:
Spoofed source addressDestinationReceived
2001:48d0:101:501::1592001:48d0:101:501::242yes
2001:4978:1fb:6400::d22001:48d0:101:501::242yes
2001:49aa:111:aa00::112001:48d0:101:501::242yes
fd11:1111:1111::11112001:48d0:101:501::242yes
2001:48d0:101:501::1592001:48d0:101:501::247yes
2001:4978:1fb:6400::d22001:48d0:101:501::247yes
2001:49aa:111:aa00::112001:48d0:101:501::247yes
fd11:1111:1111::11112001:48d0:101:501::247yes
2001:48d0:101:501::1592001:610:510:115:192:42:115:98yes
2001:4978:1fb:6400::d22001:610:510:115:192:42:115:98no
2001:49aa:111:aa00::112001:610:510:115:192:42:115:98no
fd11:1111:1111::11112001:610:510:115:192:42:115:98no
2001:48d0:101:501::1592001:630:212:225:225:90ff:fe0c:45a6yes
2001:4978:1fb:6400::d22001:630:212:225:225:90ff:fe0c:45a6no
2001:49aa:111:aa00::112001:630:212:225:225:90ff:fe0c:45a6no
fd11:1111:1111::11112001:630:212:225:225:90ff:fe0c:45a6no
2001:48d0:101:501::1592001:770:1c:7:225:90ff:fe0c:acb4yes
2001:4978:1fb:6400::d22001:770:1c:7:225:90ff:fe0c:acb4yes
2001:49aa:111:aa00::112001:770:1c:7:225:90ff:fe0c:acb4yes
fd11:1111:1111::11112001:770:1c:7:225:90ff:fe0c:acb4yes
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2803:6090:xx::/40/120272137yes
2803:6090:xx::/40/112272137yes
2803:6090:xx::/40/104272137yes
2803:6090:xx::/40/96272137yes
2803:6090:xx::/40/88272137yes
2803:6090:xx::/40/80272137yes
2803:6090:xx::/40/72272137yes
2803:6090:xx::/40/64272137yes
2803:6090:xx::/40/56272137yes
2803:6090:xx::/40/48272137yes
2803:6090:xx::/40/40UNROUTEDyes
2803:6090:80xx::/40/32UNROUTEDyes
2803:6010:xx::/40/24UNROUTEDyes
2803:e090:xx::/40/16272138yes

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)
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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