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Session Report

Summary:
Test run at: 2020-04-26 09:50:00 GMT
Client Prefix (v4): 217.169.28.x/24
Client AS (v4): 20712 (AS20712)
IPv4 Probes: 75
Client Prefix (v6): 2001:8b0:11xx::/40
Client AS (v6): 20712 (AS20712)
IPv6 Probes: 72
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 (217.169.28.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
217.169.28.x/24/3120712natblock
217.169.28.x/24/3020712natblock
217.169.28.x/24/2920712natblock
217.169.28.x/24/2820712natblock
217.169.28.x/24/2720712natblock
217.169.28.x/24/2620712natblock
217.169.28.x/24/2520712natblock
217.169.28.x/24/2420712natblock
217.169.29.x/24/2320712natblock
217.169.30.x/24/2220712natblock
217.169.24.x/24/2120712natblock
217.169.20.x/24/2020712natblock
217.169.12.x/24/1920712natblock
217.169.60.x/24/186908natblock
217.169.92.x/24/1715378natblock
217.169.156.x/24/1620932natblock
217.168.28.x/24/15UNROUTEDnatblock
217.171.28.x/24/1457809natblock
217.173.28.x/24/1329194natblock
217.161.28.x/24/121273natblock
217.185.28.x/24/116805natblock
217.137.28.x/24/105089natblock
217.233.28.x/24/93320natblock
217.41.28.x/24/82856natblock

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 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
2001:8b0:11xx::/40/12020712no
2001:8b0:11xx::/40/11220712no
2001:8b0:11xx::/40/10420712no
2001:8b0:11xx::/40/9620712no
2001:8b0:11xx::/40/8820712no
2001:8b0:11xx::/40/8020712no
2001:8b0:11xx::/40/7220712no
2001:8b0:11xx::/40/6420712no
2001:8b0:11xx::/40/5620712no
2001:8b0:11xx::/40/4820712no
2001:8b0:11xx::/40/4020712no
2001:8b0:91xx::/40/3220712no
2001:830:11xx::/40/2461157no
2001:88b0:11xx::/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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