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Session Report

Summary:
Test run at: 2023-05-25 14:39:50 GMT
Client Prefix (v4): 170.81.103.x/24
Client AS (v4): 266413
IPv4 Probes: 60
Client Prefix (v6): 2804:376c:7fxx::/40
Client AS (v6): 266413
IPv6 Probes: 52
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenblocked
Routable rewrittenblocked
Largest spoofable neighbor prefix length none/64
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 (170.81.103.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
170.81.103.x/24/31266413rewritten
170.81.103.x/24/30266413rewritten
170.81.103.x/24/29266413rewritten
170.81.103.x/24/28266413rewritten
170.81.103.x/24/27266413rewritten
170.81.103.x/24/26266413rewritten
170.81.103.x/24/25266413rewritten
170.81.103.x/24/24266413rewritten
170.81.102.x/24/23266413rewritten
170.81.101.x/24/22266413rewritten
170.81.99.x/24/21266412rewritten
170.81.111.x/24/20266416rewritten
170.81.119.x/24/19266405rewritten
170.81.71.x/24/18266409rewritten
170.81.39.x/24/17266389rewritten
170.81.231.x/24/16264832rewritten
170.80.103.x/24/15264233rewritten
170.83.103.x/24/1452601rewritten
170.85.103.x/24/1322616rewritten
170.89.103.x/24/1223241rewritten
170.65.103.x/24/11UNROUTEDrewritten
170.113.103.x/24/10UNROUTEDrewritten
170.17.103.x/24/9UNROUTEDrewritten
170.209.103.x/24/8UNROUTEDrewritten

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 1 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::1592001:40b0:7500:280::5458:517ano
2001:4978:1fb:6400::d22001:40b0:7500:280::5458:517ano
2001:49aa:111:aa00::112001:40b0:7500:280::5458:517ano
fd11:1111:1111::11112001:40b0:7500:280::5458:517ano
2001:48d0:101:501::1592001:48d0:101:501::242no
2001:4978:1fb:6400::d22001:48d0:101:501::242no
2001:49aa:111:aa00::112001:48d0:101:501::242no
fd11:1111:1111::11112001:48d0:101:501::242no
2001:48d0:101:501::1592001:48d0:101:501::247no
2001:4978:1fb:6400::d22001:48d0:101:501::247no
2001:49aa:111:aa00::112001:48d0:101:501::247no
fd11:1111:1111::11112001:48d0:101:501::247no
2001:48d0:101:501::1592001:610:510:115:192:42:115:98no
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:45a6no
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:acb4no
2001:4978:1fb:6400::d22001:770:1c:7:225:90ff:fe0c:acb4no
2001:49aa:111:aa00::112001:770:1c:7:225:90ff:fe0c:acb4no
fd11:1111:1111::11112001:770:1c:7:225:90ff:fe0c:acb4no
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2804:376c:7fxx::/40/120266413yes
2804:376c:7fxx::/40/112266413yes
2804:376c:7fxx::/40/104266413yes
2804:376c:7fxx::/40/96266413yes
2804:376c:7fxx::/40/88266413yes
2804:376c:7fxx::/40/80266413yes
2804:376c:7fxx::/40/72266413yes
2804:376c:7fxx::/40/64266413yes
2804:376c:7fxx::/40/56266413no
2804:376c:7fxx::/40/48266413no
2804:376c:7fxx::/40/40266413no
2804:376c:ffxx::/40/32266413no
2804:37ec:7fxx::/40/24UNROUTEDno
2804:b76c:7fxx::/40/16UNROUTEDno

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)
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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