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Session Report

Summary:
Test run at: 2021-09-26 14:29:47 GMT
Client Prefix (v4): 201.33.174.x/24
Client AS (v4): 53181
IPv4 Probes: 66
Client Prefix (v6): 2804:8330:xx::/40
Client AS (v6): 272182
IPv6 Probes: 56
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 nonenone
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 (201.33.174.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
201.33.174.x/24/3153181rewritten
201.33.174.x/24/3053181rewritten
201.33.174.x/24/2953181rewritten
201.33.174.x/24/2853181rewritten
201.33.174.x/24/2753181rewritten
201.33.174.x/24/2653181rewritten
201.33.174.x/24/2553181rewritten
201.33.174.x/24/2453181rewritten
201.33.175.x/24/2353181rewritten
201.33.172.x/24/2253181rewritten
201.33.170.x/24/2153181rewritten
201.33.166.x/24/2053181rewritten
201.33.190.x/24/19262589rewritten
201.33.142.x/24/1828274rewritten
201.33.238.x/24/1728285rewritten
201.33.46.x/24/1628624rewritten
201.32.174.x/24/157738rewritten
201.35.174.x/24/148167rewritten
201.37.174.x/24/1328573rewritten
201.41.174.x/24/128167rewritten
201.49.174.x/24/1128602rewritten
201.1.174.x/24/1027699rewritten
201.97.174.x/24/98151rewritten
201.161.174.x/24/816960rewritten

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 unable to spoof routable, non-adjacent source addresses through even the first IP hop.
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::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
2804:8330:xx::/40/120272182no
2804:8330:xx::/40/112272182no
2804:8330:xx::/40/104272182no
2804:8330:xx::/40/96272182no
2804:8330:xx::/40/88272182no
2804:8330:xx::/40/80272182no
2804:8330:xx::/40/72272182no
2804:8330:xx::/40/64272182no
2804:8330:xx::/40/56272182no
2804:8330:xx::/40/48272182no
2804:8330:xx::/40/40272182no
2804:8330:80xx::/40/32272182no
2804:83b0:xx::/40/24UNROUTEDno
2804:330:xx::/40/1653240no

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
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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