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Session Report

Summary:
Test run at: 2017-06-16 11:01:26 GMT
Client Prefix (v4): 67.239.57.x/24
Client AS (v4): 209 (CENTURYLINK-US-LEGACY-QWEST)
IPv4 Probes: 118
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 received
Routable received
Largest spoofable neighbor prefix length /8
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 (67.239.57.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
67.239.57.x/24/31209yes
67.239.57.x/24/30209yes
67.239.57.x/24/29209yes
67.239.57.x/24/28209yes
67.239.57.x/24/27209yes
67.239.57.x/24/26209yes
67.239.57.x/24/25209yes
67.239.57.x/24/24209yes
67.239.56.x/24/23209yes
67.239.59.x/24/22209yes
67.239.61.x/24/21209yes
67.239.49.x/24/20209yes
67.239.41.x/24/19209yes
67.239.25.x/24/18209yes
67.239.121.x/24/17209yes
67.239.185.x/24/165778yes
67.238.57.x/24/152379yes
67.237.57.x/24/14209yes
67.235.57.x/24/1314910yes
67.231.57.x/24/1230444yes
67.255.57.x/24/1111351yes
67.207.57.x/24/1011676yes
67.175.57.x/24/97922yes
67.111.57.x/24/82828yes

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)

IPv4 Outbound Filtering Depth:

The tracefilter test found your host able to spoof routable, non-adjacent source addresses through the first 10 IP hop(s).
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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