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Session Report

Summary:
Test run at: 2017-07-12 16:29:23 GMT
Client Prefix (v4): 76.4.123.x/24
Client AS (v4): 209 (CENTURYLINK-US-LEGACY-QWEST)
IPv4 Probes: 117
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length none

Meaning of result status in column:

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


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
76.4.123.x/24/31209natblock
76.4.123.x/24/30209natblock
76.4.123.x/24/29209natblock
76.4.123.x/24/28209natblock
76.4.123.x/24/27209natblock
76.4.123.x/24/26209natblock
76.4.123.x/24/25209natblock
76.4.123.x/24/24209natblock
76.4.122.x/24/23209natblock
76.4.121.x/24/22209natblock
76.4.127.x/24/21209natblock
76.4.115.x/24/20209natblock
76.4.107.x/24/19209natblock
76.4.91.x/24/18209natblock
76.4.59.x/24/17209natblock
76.4.251.x/24/16209natblock
76.5.123.x/24/15209natblock
76.6.123.x/24/14209natblock
76.0.123.x/24/13209natblock
76.12.123.x/24/1220021natblock
76.20.123.x/24/117922natblock
76.36.123.x/24/10UNROUTEDnatblock
76.68.123.x/24/9577natblock
76.132.123.x/24/87922natblock

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.
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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