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Session Report

Summary:
Test run at: 2018-10-07 22:25:10 GMT
Client Prefix (v4): 203.55.174.x/24
Client AS (v4): 9268 (OVERTHEWIRE-AS-AP)
IPv4 Probes: 124
Client Prefix (v6): 2402:c00:xx::/40
Client AS (v6): 9268 (OVERTHEWIRE-AS-AP)
IPv6 Probes: 82
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/24/319268natblock
203.55.174.x/24/309268natblock
203.55.174.x/24/299268natblock
203.55.174.x/24/289268natblock
203.55.174.x/24/279268natblock
203.55.174.x/24/269268natblock
203.55.174.x/24/259268natblock
203.55.174.x/24/249268natblock
203.55.175.x/24/239268natblock
203.55.172.x/24/2263850natblock
203.55.170.x/24/21UNROUTEDnatblock
203.55.166.x/24/2024130natblock
203.55.190.x/24/19UNROUTEDnatblock
203.55.142.x/24/1824446natblock
203.55.238.x/24/17UNROUTEDnatblock
203.55.46.x/24/164739natblock
203.54.174.x/24/151221natblock
203.53.174.x/24/141221natblock
203.51.174.x/24/131221natblock
203.63.174.x/24/122764natblock
203.39.174.x/24/111221natblock
203.23.174.x/24/10UNROUTEDnatblock
203.119.174.x/24/9UNROUTEDnatblock
203.183.174.x/24/84694natblock

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
2001:48d0:101:501:ec4:7aff:fea8:71a82001:48d0:101:501::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
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::/40/569268no
2402:c00:xx::/40/489268no
2402:c00:xx::/40/409268no
2402:c00:80xx::/40/329268no
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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