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Session Report

Summary:
Test run at: 2017-07-15 11:48:56 GMT
Client Prefix (v4): 85.72.87.x/24
Client AS (v4): 6799 (OTENET-GR)
IPv4 Probes: 132
Client Prefix (v6): 2a02:587:b9xx::/40
Client AS (v6): 6799 (OTENET-GR)
IPv6 Probes: 77
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA unknownblocked
Routable unknownblocked
Largest spoofable neighbor prefix length none/56
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.
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 (85.72.87.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
85.72.87.x/24/316799natblock
85.72.87.x/24/306799natblock
85.72.87.x/24/296799natblock
85.72.87.x/24/286799natblock
85.72.87.x/24/276799natblock
85.72.87.x/24/266799natblock
85.72.87.x/24/256799natblock
85.72.87.x/24/246799natblock
85.72.86.x/24/236799natblock
85.72.85.x/24/226799natblock
85.72.83.x/24/216799natblock
85.72.95.x/24/206799natblock
85.72.71.x/24/196799natblock
85.72.119.x/24/186799natblock
85.72.23.x/24/176799natblock
85.72.215.x/24/166799natblock
85.73.87.x/24/156799natblock
85.74.87.x/24/146799natblock
85.76.87.x/24/13790natblock
85.64.87.x/24/121680natblock
85.88.87.x/24/1134100natblock
85.104.87.x/24/109121natblock
85.8.87.x/24/915747natblock
85.200.87.x/24/88542natblock

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 probes:
Spoofed source addressDestinationReceived
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2a02:587:b9xx::/40/1206799yes
2a02:587:b9xx::/40/1126799yes
2a02:587:b9xx::/40/1046799yes
2a02:587:b9xx::/40/966799yes
2a02:587:b9xx::/40/886799yes
2a02:587:b9xx::/40/806799yes
2a02:587:b9xx::/40/726799yes
2a02:587:b9xx::/40/646799yes
2a02:587:b9xx::/40/566799yes
2a02:587:b9xx::/40/486799natblock
2a02:587:b9xx::/40/406799natblock
2a02:587:39xx::/40/326799natblock
2a02:507:b9xx::/40/24UNROUTEDnatblock
2a02:8587:b9xx::/40/16UNROUTEDnatblock

Meaning of status in Received column:

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