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Session Report

Summary:
Test run at: 2017-09-21 19:01:57 GMT
Client Prefix (v4): 76.208.83.x/24
Client AS (v4): 7132 (SBIS-AS)
IPv4 Probes: 117
Client Prefix (v6): 2602:304:cdxx::/40
Client AS (v6): 7018 (ATT-INTERNET4)
IPv6 Probes: 77
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 (76.208.83.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
76.208.83.x/24/317132rewritten
76.208.83.x/24/307132rewritten
76.208.83.x/24/297132rewritten
76.208.83.x/24/287132rewritten
76.208.83.x/24/277132rewritten
76.208.83.x/24/267132rewritten
76.208.83.x/24/257132rewritten
76.208.83.x/24/247132rewritten
76.208.82.x/24/237132rewritten
76.208.81.x/24/227132rewritten
76.208.87.x/24/217132rewritten
76.208.91.x/24/207132rewritten
76.208.67.x/24/197132rewritten
76.208.115.x/24/187132rewritten
76.208.19.x/24/177132rewritten
76.208.211.x/24/167132rewritten
76.209.83.x/24/157132rewritten
76.210.83.x/24/147132rewritten
76.212.83.x/24/137132rewritten
76.216.83.x/24/127018rewritten
76.192.83.x/24/117018rewritten
76.240.83.x/24/107018rewritten
76.144.83.x/24/97922rewritten
76.80.83.x/24/820001rewritten

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
2001:4978:1fb:6400::d22001:388:1:5001:21c:c0ff:fea2:4a3ano
2001:49aa:111:aa00::112001:388:1:5001:21c:c0ff:fea2:4a3ano
fd11:1111:1111::11112001:388:1:5001:21c:c0ff:fea2:4a3ano
2001:4978:1fb:6400::d22001:410:102:1::78no
2001:49aa:111:aa00::112001:410:102:1::78no
fd11:1111:1111::11112001:410:102:1::78no
2001:4978:1fb:6400::d22001:410:90ff::5no
2001:49aa:111:aa00::112001:410:90ff::5no
fd11:1111:1111::11112001:410:90ff::5no
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
2001:4978:1fb:6400::d22001:48d0:101:501::247no
2001:49aa:111:aa00::112001:48d0:101:501::247no
fd11:1111:1111::11112001:48d0:101:501::247no
2001:4978:1fb: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
2001:4978:1fb: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
2001:4978:1fb:6400::d22001:708:40:2001:21c:c0ff:fea2:4c5cno
2001:49aa:111:aa00::112001:708:40:2001:21c:c0ff:fea2:4c5cno
fd11:1111:1111::11112001:708:40:2001:21c:c0ff:fea2:4c5cno
2001:4978:1fb:6400::d22001:770:18:7:225:90ff:fe0c:acb4no
2001:49aa:111:aa00::112001:770:18:7:225:90ff:fe0c:acb4no
fd11:1111:1111::11112001:770:18:7:225:90ff:fe0c:acb4no
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2602:304:cdxx::/40/1207018yes
2602:304:cdxx::/40/1127018yes
2602:304:cdxx::/40/1047018yes
2602:304:cdxx::/40/967018yes
2602:304:cdxx::/40/887018yes
2602:304:cdxx::/40/807018yes
2602:304:cdxx::/40/727018yes
2602:304:cdxx::/40/647018yes
2602:304:cdxx::/40/567018no
2602:304:cdxx::/40/487018no
2602:304:cdxx::/40/407018no
2602:304:4dxx::/40/327018no
2602:384:cdxx::/40/247018no
2602:8304:cdxx::/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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