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Session Report

Summary:
Test run at: 2021-08-01 23:33:50 GMT
Client Prefix (v4): 143.255.61.x/24
Client AS (v4): 263037
IPv4 Probes: 66
Client Prefix (v6): 2804:d0c:80xx::/40
Client AS (v6): 53112
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenblocked
Routable rewrittenblocked
Largest spoofable neighbor prefix length none/56

Meaning of result status in column:

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


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
143.255.61.x/24/31263037rewritten
143.255.61.x/24/30263037rewritten
143.255.61.x/24/29263037rewritten
143.255.61.x/24/28263037rewritten
143.255.61.x/24/27263037rewritten
143.255.61.x/24/26263037rewritten
143.255.61.x/24/25263037rewritten
143.255.61.x/24/24263037rewritten
143.255.60.x/24/23263037rewritten
143.255.63.x/24/22263037rewritten
143.255.57.x/24/2133182rewritten
143.255.53.x/24/20265139rewritten
143.255.45.x/24/19263623rewritten
143.255.29.x/24/18UNROUTEDrewritten
143.255.125.x/24/17262343rewritten
143.255.189.x/24/16UNROUTEDrewritten
143.254.61.x/24/153734rewritten
143.253.61.x/24/14UNROUTEDrewritten
143.251.61.x/24/13UNROUTEDrewritten
143.247.61.x/24/12UNROUTEDrewritten
143.239.61.x/24/111213rewritten
143.223.61.x/24/10UNROUTEDrewritten
143.191.61.x/24/9UNROUTEDrewritten
143.127.61.x/24/8UNROUTEDrewritten

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::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
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2804:d0c:80xx::/40/12053112yes
2804:d0c:80xx::/40/11253112yes
2804:d0c:80xx::/40/10453112yes
2804:d0c:80xx::/40/9653112yes
2804:d0c:80xx::/40/8853112yes
2804:d0c:80xx::/40/8053112yes
2804:d0c:80xx::/40/7253112yes
2804:d0c:80xx::/40/6453112yes
2804:d0c:80xx::/40/5653112yes
2804:d0c:80xx::/40/4853112no
2804:d0c:80xx::/40/4053112no
2804:d0c:xx::/40/3253112no
2804:d8c:80xx::/40/2452638no
2804:8d0c:80xx::/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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