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Session Report

Summary:
Test run at: 2022-03-16 15:51:53 GMT
Client Prefix (v4): 86.168.84.x/24
Client AS (v4): 2856 (BT-UK-AS)
IPv4 Probes: 60
Client Prefix (v6): 2a00:23c5:caxx::/40
Client AS (v6): 2856 (BT-UK-AS)
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
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 (86.168.84.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
86.168.84.x/24/312856rewritten
86.168.84.x/24/302856rewritten
86.168.84.x/24/292856rewritten
86.168.84.x/24/282856rewritten
86.168.84.x/24/272856rewritten
86.168.84.x/24/262856rewritten
86.168.84.x/24/252856rewritten
86.168.84.x/24/242856rewritten
86.168.85.x/24/232856rewritten
86.168.86.x/24/222856rewritten
86.168.80.x/24/212856rewritten
86.168.92.x/24/202856rewritten
86.168.68.x/24/192856rewritten
86.168.116.x/24/182856rewritten
86.168.20.x/24/172856rewritten
86.168.212.x/24/162856rewritten
86.169.84.x/24/152856rewritten
86.170.84.x/24/142856rewritten
86.172.84.x/24/132856rewritten
86.160.84.x/24/122856rewritten
86.184.84.x/24/112856rewritten
86.136.84.x/24/102856rewritten
86.232.84.x/24/9UNROUTEDrewritten
86.40.84.x/24/85466rewritten

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 able to spoof routable, non-adjacent source addresses through the first 1 IP hop(s).
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
2a00:23c5:caxx::/40/1202856yes
2a00:23c5:caxx::/40/1122856yes
2a00:23c5:caxx::/40/1042856yes
2a00:23c5:caxx::/40/962856yes
2a00:23c5:caxx::/40/882856yes
2a00:23c5:caxx::/40/802856yes
2a00:23c5:caxx::/40/722856yes
2a00:23c5:caxx::/40/642856yes
2a00:23c5:caxx::/40/562856yes
2a00:23c5:caxx::/40/482856no
2a00:23c5:caxx::/40/402856no
2a00:23c5:4axx::/40/322856no
2a00:2345:caxx::/40/245400no
2a00:a3c5:caxx::/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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