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Session Report

Summary:
Test run at: 2024-08-10 01:41:03 GMT
Client Prefix (v4): 166.199.60.x/24
Client AS (v4): 7018 (ATT-INTERNET4)
IPv4 Probes: 69
Client Prefix (v6): 2600:387:xx::/40
Client AS (v6): 7018 (ATT-INTERNET4)
IPv6 Probes: 68
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedblocked
Routable blockedblocked
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.
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 (166.199.60.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
166.199.60.x/24/317018natblock
166.199.60.x/24/307018natblock
166.199.60.x/24/297018natblock
166.199.60.x/24/287018natblock
166.199.60.x/24/277018natblock
166.199.60.x/24/267018natblock
166.199.60.x/24/257018natblock
166.199.60.x/24/247018natblock
166.199.61.x/24/237018natblock
166.199.62.x/24/227018natblock
166.199.56.x/24/217018natblock
166.199.52.x/24/207018natblock
166.199.44.x/24/197018natblock
166.199.28.x/24/187018natblock
166.199.124.x/24/177018natblock
166.199.188.x/24/167018natblock
166.198.60.x/24/157018natblock
166.197.60.x/24/147287natblock
166.195.60.x/24/1320057natblock
166.207.60.x/24/12UNROUTEDnatblock
166.215.60.x/24/1120057natblock
166.231.60.x/24/10UNROUTEDnatblock
166.135.60.x/24/920057natblock
166.71.60.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 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
2600:387:xx::/40/1207018natblock
2600:387:xx::/40/1127018natblock
2600:387:xx::/40/1047018natblock
2600:387:xx::/40/967018natblock
2600:387:xx::/40/887018natblock
2600:387:xx::/40/807018natblock
2600:387:xx::/40/727018natblock
2600:387:xx::/40/647018natblock
2600:387:xx::/40/567018natblock
2600:387:xx::/40/487018natblock
2600:387:xx::/40/407018natblock
2600:387:80xx::/40/327018natblock
2600:307:xx::/40/247018natblock
2600:8387:xx::/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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