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Session Report

Summary:
Test run at: 2023-05-26 02:11:13 GMT
Client Prefix (v4): 200.39.37.x/24
Client AS (v4): 271343
IPv4 Probes: 60
Client Prefix (v6): 2804:7a08:2xx::/40
Client AS (v6): 271343
IPv6 Probes: 52
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenreceived
Routable rewrittenreceived
Largest spoofable neighbor prefix length none/16
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 (200.39.37.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
200.39.37.x/24/31271343rewritten
200.39.37.x/24/30271343rewritten
200.39.37.x/24/29271343rewritten
200.39.37.x/24/28271343rewritten
200.39.37.x/24/27271343rewritten
200.39.37.x/24/26271343rewritten
200.39.37.x/24/25271343rewritten
200.39.37.x/24/24271343rewritten
200.39.36.x/24/23271343rewritten
200.39.39.x/24/22271343rewritten
200.39.33.x/24/21271333rewritten
200.39.45.x/24/20271425rewritten
200.39.53.x/24/19271419rewritten
200.39.5.x/24/187438rewritten
200.39.101.x/24/1719332rewritten
200.39.165.x/24/162549rewritten
200.38.37.x/24/15UNROUTEDrewritten
200.37.37.x/24/146147rewritten
200.35.37.x/24/1327695rewritten
200.47.37.x/24/12UNROUTEDrewritten
200.55.37.x/24/113549rewritten
200.7.37.x/24/1027734rewritten
200.103.37.x/24/98167rewritten
200.167.37.x/24/84230rewritten

Meaning of status in Received column:

rewrittenThe source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.

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
2001:48d0:101:501::1592001:40b0:7500:280::5458:517ayes
2001:4978:1fb:6400::d22001:40b0:7500:280::5458:517ayes
2001:49aa:111:aa00::112001:40b0:7500:280::5458:517ayes
fd11:1111:1111::11112001:40b0:7500:280::5458:517ayes
2001:48d0:101:501::1592001:48d0:101:501::242yes
2001:4978:1fb:6400::d22001:48d0:101:501::242yes
2001:49aa:111:aa00::112001:48d0:101:501::242yes
fd11:1111:1111::11112001:48d0:101:501::242yes
2001:48d0:101:501::1592001:48d0:101:501::247yes
2001:4978:1fb:6400::d22001:48d0:101:501::247yes
2001:49aa:111:aa00::112001:48d0:101:501::247yes
fd11:1111:1111::11112001:48d0:101:501::247yes
2001:48d0:101:501::1592001:610:510:115:192:42:115:98yes
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:45a6yes
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:acb4yes
2001:4978:1fb:6400::d22001:770:1c:7:225:90ff:fe0c:acb4yes
2001:49aa:111:aa00::112001:770:1c:7:225:90ff:fe0c:acb4yes
fd11:1111:1111::11112001:770:1c:7:225:90ff:fe0c:acb4yes
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2804:7a08:2xx::/40/120271343yes
2804:7a08:2xx::/40/112271343yes
2804:7a08:2xx::/40/104271343yes
2804:7a08:2xx::/40/96271343yes
2804:7a08:2xx::/40/88271343yes
2804:7a08:2xx::/40/80271343yes
2804:7a08:2xx::/40/72271343yes
2804:7a08:2xx::/40/64271343yes
2804:7a08:2xx::/40/56271343yes
2804:7a08:2xx::/40/48271343yes
2804:7a08:2xx::/40/40271343yes
2804:7a08:82xx::/40/32271343yes
2804:7a88:2xx::/40/24271377yes
2804:fa08:2xx::/40/16UNROUTEDyes

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received
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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