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Session Report

Summary:
Test run at: 2017-05-11 19:22:34 GMT
Client Prefix (v4): 67.183.235.x/24
Client AS (v4): 7922 (COMCAST-7922)
IPv4 Probes: 131
Client Prefix (v6): 2601:601:80xx::/40
Client AS (v6): 7922 (COMCAST-7922)
IPv6 Probes: 77
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedblocked
Routable blockedblocked
Largest spoofable neighbor prefix length none/32
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 (67.183.235.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
67.183.235.x/24/317922natblock
67.183.235.x/24/307922natblock
67.183.235.x/24/297922natblock
67.183.235.x/24/287922natblock
67.183.235.x/24/277922natblock
67.183.235.x/24/267922natblock
67.183.235.x/24/257922natblock
67.183.235.x/24/247922natblock
67.183.234.x/24/237922natblock
67.183.233.x/24/227922natblock
67.183.239.x/24/217922natblock
67.183.227.x/24/207922natblock
67.183.251.x/24/197922natblock
67.183.203.x/24/187922natblock
67.183.171.x/24/177922natblock
67.183.107.x/24/167922natblock
67.182.235.x/24/157922natblock
67.181.235.x/24/147922natblock
67.179.235.x/24/137922natblock
67.191.235.x/24/127922natblock
67.167.235.x/24/117922natblock
67.151.235.x/24/107029natblock
67.247.235.x/24/911351natblock
67.55.235.x/24/85056natblock

Meaning of status in Received column:

natblockSpoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.

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 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
2601:601:80xx::/40/1207922yes
2601:601:80xx::/40/1127922yes
2601:601:80xx::/40/1047922yes
2601:601:80xx::/40/967922yes
2601:601:80xx::/40/887922yes
2601:601:80xx::/40/807922yes
2601:601:80xx::/40/727922yes
2601:601:80xx::/40/647922yes
2601:601:80xx::/40/567922no
2601:601:80xx::/40/487922no
2601:601:80xx::/40/407922no
2601:601:xx::/40/327922yes
2601:681:80xx::/40/247922no
2601:8601:80xx::/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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