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Session Report

Summary:
Test run at: 2018-06-07 06:17:16 GMT
Client Prefix (v4): 203.55.174.x/24
Client AS (v4): 9268 (OVERTHEWIRE-AS-AP)
IPv4 Probes: 99
Client Prefix (v6): 2402:c00:xx::/40
Client AS (v6): 9268 (OVERTHEWIRE-AS-AP)
IPv6 Probes: 65
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/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.
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/24/31UNROUTEDnatblock
203.55.174.x/24/30UNROUTEDnatblock
203.55.174.x/24/29UNROUTEDnatblock
203.55.174.x/24/28UNROUTEDnatblock
203.55.174.x/24/27UNROUTEDnatblock
203.55.174.x/24/26UNROUTEDnatblock
203.55.174.x/24/25UNROUTEDnatblock
203.55.174.x/24/24UNROUTEDnatblock
203.55.175.x/24/23UNROUTEDnatblock
203.55.172.x/24/22UNROUTEDnatblock
203.55.170.x/24/21UNROUTEDnatblock
203.55.166.x/24/20UNROUTEDnatblock
203.55.190.x/24/19UNROUTEDnatblock
203.55.142.x/24/18UNROUTEDnatblock
203.55.238.x/24/17UNROUTEDnatblock
203.55.46.x/24/16UNROUTEDnatblock
203.54.174.x/24/15UNROUTEDnatblock
203.53.174.x/24/14UNROUTEDnatblock
203.51.174.x/24/13UNROUTEDnatblock
203.63.174.x/24/12UNROUTEDnatblock
203.39.174.x/24/11UNROUTEDnatblock
203.23.174.x/24/10UNROUTEDnatblock
203.119.174.x/24/9UNROUTEDnatblock
203.183.174.x/24/8UNROUTEDnatblock

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
2001:4978:1fb:6400::d22607:f278:2:13:ba27:ebff:fe3f:b21eno
2001:49aa:111:aa00::112607:f278:2:13:ba27:ebff:fe3f:b21eno
fd11:1111:1111::11112607:f278:2:13:ba27:ebff:fe3f:b21eno
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::/40/56UNROUTEDno
2402:c00:xx::/40/48UNROUTEDno
2402:c00:xx::/40/40UNROUTEDno
2402:c00:80xx::/40/32UNROUTEDno
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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