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Session Report

Summary:
Test run at: 2021-09-09 16:09:40 GMT
Client Prefix (v4): 192.141.255.x/24
Client AS (v4): 267503
IPv4 Probes: 66
Client Prefix (v6): 2804:427c:1xx::/40
Client AS (v6): 267503
IPv6 Probes: 56
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 (192.141.255.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
192.141.255.x/24/31267503rewritten
192.141.255.x/24/30267503rewritten
192.141.255.x/24/29267503rewritten
192.141.255.x/24/28267503rewritten
192.141.255.x/24/27267503rewritten
192.141.255.x/24/26267503rewritten
192.141.255.x/24/25267503rewritten
192.141.255.x/24/24267503rewritten
192.141.254.x/24/23267503rewritten
192.141.253.x/24/22267503rewritten
192.141.251.x/24/21267498rewritten
192.141.247.x/24/20265540rewritten
192.141.239.x/24/19267483rewritten
192.141.223.x/24/18267480rewritten
192.141.191.x/24/17267494rewritten
192.141.127.x/24/16265524rewritten
192.140.255.x/24/15135310rewritten
192.143.255.x/24/1437611rewritten
192.137.255.x/24/13UNROUTEDrewritten
192.133.255.x/24/1230549rewritten
192.157.255.x/24/1112479rewritten
192.173.255.x/24/103663rewritten
192.205.255.x/24/9UNROUTEDrewritten
192.13.255.x/24/8749rewritten

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::1592001:48d0:101:501::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: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
2804:427c:1xx::/40/120267503yes
2804:427c:1xx::/40/112267503yes
2804:427c:1xx::/40/104267503yes
2804:427c:1xx::/40/96267503yes
2804:427c:1xx::/40/88267503yes
2804:427c:1xx::/40/80267503yes
2804:427c:1xx::/40/72267503yes
2804:427c:1xx::/40/64267503yes
2804:427c:1xx::/40/56267503yes
2804:427c:1xx::/40/48267503yes
2804:427c:1xx::/40/40267503yes
2804:427c:81xx::/40/32267503yes
2804:42fc:1xx::/40/24UNROUTEDyes
2804:c27c:1xx::/40/16UNROUTEDyes

Meaning of status in Received column:

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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