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Session Report

Summary:
Test run at: 2018-10-01 16:50:09 GMT
Client Prefix (v4): 199.187.216.x/24
Client AS (v4): 19230 (NANOG)
IPv4 Probes: 124
Client Prefix (v6): 2001:558:14xx::/40
Client AS (v6): 7922 (COMCAST-7922)
IPv6 Probes: 82
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedunknown
Routable receivedunknown
Largest spoofable neighbor prefix length /8none

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 (199.187.216.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
199.187.216.x/24/3119230yes
199.187.216.x/24/3019230yes
199.187.216.x/24/2919230yes
199.187.216.x/24/2819230yes
199.187.216.x/24/2719230yes
199.187.216.x/24/2619230yes
199.187.216.x/24/2519230yes
199.187.216.x/24/2419230yes
199.187.217.x/24/2319230yes
199.187.218.x/24/2219230yes
199.187.220.x/24/2119230yes
199.187.208.x/24/2046562yes
199.187.200.x/24/1919331yes
199.187.248.x/24/1819201yes
199.187.152.x/24/1714436yes
199.187.88.x/24/16UNROUTEDyes
199.186.216.x/24/157018yes
199.185.216.x/24/14UNROUTEDyes
199.191.216.x/24/13UNROUTEDyes
199.179.216.x/24/12UNROUTEDyes
199.171.216.x/24/11701yes
199.155.216.x/24/104152yes
199.251.216.x/24/9721yes
199.59.216.x/24/836056yes

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).
IPv6 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.

  

  
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2001:558:14xx::/40/1207922no
2001:558:14xx::/40/1127922no
2001:558:14xx::/40/1047922no
2001:558:14xx::/40/967922no
2001:558:14xx::/40/887922no
2001:558:14xx::/40/807922no
2001:558:14xx::/40/727922no
2001:558:14xx::/40/647922no
2001:558:14xx::/40/567922no
2001:558:14xx::/40/487922no
2001:558:14xx::/40/407922no
2001:558:94xx::/40/327922no
2001:5d8:14xx::/40/243742no
2001:8558:14xx::/40/161221no

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
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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