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Session Report

Summary:
Test run at: 2023-10-11 19:10:50 GMT
Client Prefix (v4): 104.28.207.x/24
Client AS (v4): 13335 (CLOUDFLARENET)
IPv4 Probes: 69
Client Prefix (v6): 2a09:bac1:11xx::/40
Client AS (v6): 13335 (CLOUDFLARENET)
IPv6 Probes: 60
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 (104.28.207.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
104.28.207.x/24/3113335natblock
104.28.207.x/24/3013335natblock
104.28.207.x/24/2913335natblock
104.28.207.x/24/2813335natblock
104.28.207.x/24/2713335natblock
104.28.207.x/24/2613335natblock
104.28.207.x/24/2513335natblock
104.28.207.x/24/2413335natblock
104.28.206.x/24/2313335natblock
104.28.205.x/24/2213335natblock
104.28.203.x/24/2113335natblock
104.28.199.x/24/2013335natblock
104.28.223.x/24/1913335natblock
104.28.239.x/24/1813335natblock
104.28.143.x/24/1713335natblock
104.28.79.x/24/1613335natblock
104.29.207.x/24/1513335natblock
104.30.207.x/24/1413335natblock
104.24.207.x/24/1313335natblock
104.20.207.x/24/1213335natblock
104.12.207.x/24/117018natblock
104.60.207.x/24/107018natblock
104.92.207.x/24/920940natblock
104.156.207.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
2a09:bac1:11xx::/40/12013335natblock
2a09:bac1:11xx::/40/11213335natblock
2a09:bac1:11xx::/40/10413335natblock
2a09:bac1:11xx::/40/9613335natblock
2a09:bac1:11xx::/40/8813335natblock
2a09:bac1:11xx::/40/8013335natblock
2a09:bac1:11xx::/40/7213335natblock
2a09:bac1:11xx::/40/6413335natblock
2a09:bac1:11xx::/40/5613335natblock
2a09:bac1:11xx::/40/4813335natblock
2a09:bac1:11xx::/40/4013335natblock
2a09:bac1:91xx::/40/3213335natblock
2a09:ba41:11xx::/40/24UNROUTEDnatblock
2a09:3ac1:11xx::/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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