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Session Report

Summary:
Test run at: 2017-03-27 09:53:15 GMT
Client Prefix (v4): 199.201.66.x/24
Client AS (v4): 54115 (FACEBOOK-CORP)
IPv4 Probes: 105
Client Prefix (v6): 2620:10d:c0xx::/40
Client AS (v6): 54115 (FACEBOOK-CORP)
IPv6 Probes: 86
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA unknownunknown
Routable unknownunknown
Largest spoofable neighbor prefix length nonenone
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 (199.201.66.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
199.201.66.x/24/3154115natblock
199.201.66.x/24/3054115natblock
199.201.66.x/24/2954115natblock
199.201.66.x/24/2854115natblock
199.201.66.x/24/2754115natblock
199.201.66.x/24/2654115natblock
199.201.66.x/24/2554115natblock
199.201.66.x/24/2454115natblock
199.201.67.x/24/2354115natblock
199.201.64.x/24/2254115natblock
199.201.70.x/24/2117049natblock
199.201.74.x/24/2029934natblock
199.201.82.x/24/1927298natblock
199.201.98.x/24/18UNROUTEDnatblock
199.201.2.x/24/17UNROUTEDnatblock
199.201.194.x/24/16UNROUTEDnatblock
199.200.66.x/24/15UNROUTEDnatblock
199.203.66.x/24/141680natblock
199.205.66.x/24/13UNROUTEDnatblock
199.193.66.x/24/12UNROUTEDnatblock
199.217.66.x/24/113561natblock
199.233.66.x/24/10UNROUTEDnatblock
199.137.66.x/24/94152natblock
199.73.66.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 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2620:10d:c0xx::/40/12054115natblock
2620:10d:c0xx::/40/11254115natblock
2620:10d:c0xx::/40/10454115natblock
2620:10d:c0xx::/40/9654115natblock
2620:10d:c0xx::/40/8854115natblock
2620:10d:c0xx::/40/8054115natblock
2620:10d:c0xx::/40/7254115natblock
2620:10d:c0xx::/40/6454115natblock
2620:10d:c0xx::/40/5654115natblock
2620:10d:c0xx::/40/4854115natblock
2620:10d:c0xx::/40/40UNROUTEDnatblock
2620:10d:40xx::/40/32UNROUTEDnatblock
2620:18d:c0xx::/40/24UNROUTEDnatblock
2620:810d:c0xx::/40/16UNROUTEDnatblock

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.
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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