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Session Report

Summary:
Test run at: 2022-02-24 16:24:26 GMT
Client Prefix (v4): 136.55.8.x/24
Client AS (v4): 16591 (GOOGLE-FIBER)
IPv4 Probes: 60
Client Prefix (v6): 2605:a601:55xx::/40
Client AS (v6): 16591 (GOOGLE-FIBER)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenblocked
Routable blockedblocked
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.

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 (136.55.8.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
136.55.8.x/24/3116591natblock
136.55.8.x/24/3016591natblock
136.55.8.x/24/2916591natblock
136.55.8.x/24/2816591natblock
136.55.8.x/24/2716591natblock
136.55.8.x/24/2616591natblock
136.55.8.x/24/2516591natblock
136.55.8.x/24/2416591natblock
136.55.9.x/24/2316591natblock
136.55.10.x/24/2216591natblock
136.55.12.x/24/2116591natblock
136.55.0.x/24/2016591natblock
136.55.24.x/24/1916591natblock
136.55.40.x/24/1816591natblock
136.55.72.x/24/1716591natblock
136.55.136.x/24/1616591natblock
136.54.8.x/24/1516591natblock
136.53.8.x/24/1416591natblock
136.51.8.x/24/1316591natblock
136.63.8.x/24/1216591natblock
136.39.8.x/24/1116591natblock
136.23.8.x/24/1036492natblock
136.119.8.x/24/915169natblock
136.183.8.x/24/819933natblock

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 able to spoof routable, non-adjacent source addresses through the first 1 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 probes:
Spoofed source addressDestinationReceived
2001:48d0:101:501::1592001:48d0:101:501::242no
2001:4978:1fb:6400::d22001:48d0:101:501::242no
2001:49aa:111:aa00::112001:48d0:101:501::242no
fd11:1111:1111::11112001:48d0:101:501::242no
2001:48d0:101:501::1592001:48d0:101:501::247no
2001:4978:1fb:6400::d22001:48d0:101:501::247no
2001:49aa:111:aa00::112001:48d0:101:501::247no
fd11:1111:1111::11112001:48d0:101:501::247no
2001:48d0:101:501::1592001:610:510:115:192:42:115:98no
2001:4978:1fb:6400::d22001:610:510:115:192:42:115:98no
2001:49aa:111:aa00::112001:610:510:115:192:42:115:98no
fd11:1111:1111::11112001:610:510:115:192:42:115:98no
2001:48d0:101:501::1592001:630:212:225:225:90ff:fe0c:45a6no
2001:4978:1fb:6400::d22001:630:212:225:225:90ff:fe0c:45a6no
2001:49aa:111:aa00::112001:630:212:225:225:90ff:fe0c:45a6no
fd11:1111:1111::11112001:630:212:225:225:90ff:fe0c:45a6no
2001:48d0:101:501::1592001:770:1c:7:225:90ff:fe0c:acb4no
2001:4978:1fb:6400::d22001:770:1c:7:225:90ff:fe0c:acb4no
2001:49aa:111:aa00::112001:770:1c:7:225:90ff:fe0c:acb4no
fd11:1111:1111::11112001:770:1c:7:225:90ff:fe0c:acb4no
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2605:a601:55xx::/40/12016591yes
2605:a601:55xx::/40/11216591yes
2605:a601:55xx::/40/10416591yes
2605:a601:55xx::/40/9616591yes
2605:a601:55xx::/40/8816591yes
2605:a601:55xx::/40/8016591yes
2605:a601:55xx::/40/7216591yes
2605:a601:55xx::/40/6416591yes
2605:a601:55xx::/40/5616591yes
2605:a601:55xx::/40/4816591no
2605:a601:55xx::/40/4016591no
2605:a601:d5xx::/40/3216591no
2605:a681:55xx::/40/24UNROUTEDno
2605:2601:55xx::/40/16UNROUTEDno

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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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