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Session Report

Summary:
Test run at: 2017-07-14 02:02:28 GMT
Client Prefix (v4): 203.55.174.x/24
Client AS (v4): 9268 (OVERTHEWIRE-AS-AP)
IPv4 Probes: 131
Client Prefix (v6): 2402:c00:xx::/40
Client AS (v6): 9268 (OVERTHEWIRE-AS-AP)
IPv6 Probes: 77
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenreceived
Routable rewrittenreceived
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.

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 (203.55.174.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
203.55.174.x/24/319268rewritten
203.55.174.x/24/309268rewritten
203.55.174.x/24/299268rewritten
203.55.174.x/24/289268rewritten
203.55.174.x/24/279268rewritten
203.55.174.x/24/269268rewritten
203.55.174.x/24/259268rewritten
203.55.174.x/24/249268rewritten
203.55.175.x/24/239268rewritten
203.55.172.x/24/227474rewritten
203.55.170.x/24/21UNROUTEDrewritten
203.55.166.x/24/2024130rewritten
203.55.190.x/24/19UNROUTEDrewritten
203.55.142.x/24/1824446rewritten
203.55.238.x/24/17UNROUTEDrewritten
203.55.46.x/24/164739rewritten
203.54.174.x/24/151221rewritten
203.53.174.x/24/141221rewritten
203.51.174.x/24/131221rewritten
203.63.174.x/24/122764rewritten
203.39.174.x/24/111221rewritten
203.23.174.x/24/10UNROUTEDrewritten
203.119.174.x/24/9UNROUTEDrewritten
203.183.174.x/24/84694rewritten

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 probes:
Spoofed source addressDestinationReceived
2001:4978:1fb:6400::d22001:388:1:5001:21c:c0ff:fea2:4a3ayes
2001:49aa:111:aa00::112001:388:1:5001:21c:c0ff:fea2:4a3ayes
fd11:1111:1111::11112001:388:1:5001:21c:c0ff:fea2:4a3ayes
2001:4978:1fb:6400::d22001:410:102:1::78yes
2001:49aa:111:aa00::112001:410:102:1::78no
fd11:1111:1111::11112001:410:102:1::78no
2001:4978:1fb:6400::d22001:410:90ff::5yes
2001:49aa:111:aa00::112001:410:90ff::5no
fd11:1111:1111::11112001:410:90ff::5no
2001:4978:1fb:6400::d22001:48d0:101:501::242yes
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::247yes
2001:49aa:111:aa00::112001:48d0:101:501::247no
fd11:1111:1111::11112001:48d0:101:501::247no
2001:4978:1fb:6400::d22001:610:510:115:192:42:115:98yes
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:45a6yes
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:fea2:4c5cyes
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:acb4yes
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
2402:c00:xx::/40/1209268yes
2402:c00:xx::/40/1129268yes
2402:c00:xx::/40/1049268yes
2402:c00:xx::/40/969268yes
2402:c00:xx::/40/889268yes
2402:c00:xx::/40/809268yes
2402:c00:xx::/40/729268yes
2402:c00:xx::/40/649268yes
2402:c00:xx::/40/569268yes
2402:c00:xx::/40/489268yes
2402:c00:xx::/40/409268yes
2402:c00:80xx::/40/329268yes
2402:c80:xx::/40/24UNROUTEDno
2402:8c00:xx::/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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