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Session Report

Summary:
Test run at: 2021-07-04 10:06:57 GMT
Client Prefix (v4): 85.204.109.x/24
Client AS (v4): 207375 (FIBO)
IPv4 Probes: 66
Client Prefix (v6): 2a00:bba0:12xx::/40
Client AS (v6): 207375 (FIBO)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenreceived
Routable receivedreceived
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 (85.204.109.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
85.204.109.x/24/31207375rewritten
85.204.109.x/24/30207375rewritten
85.204.109.x/24/29207375rewritten
85.204.109.x/24/28207375rewritten
85.204.109.x/24/27207375rewritten
85.204.109.x/24/26207375rewritten
85.204.109.x/24/25207375rewritten
85.204.109.x/24/24207375rewritten
85.204.108.x/24/235606rewritten
85.204.111.x/24/2233977rewritten
85.204.105.x/24/2139501rewritten
85.204.101.x/24/206663rewritten
85.204.125.x/24/1912695rewritten
85.204.77.x/24/1839501rewritten
85.204.45.x/24/1745035rewritten
85.204.237.x/24/168751rewritten
85.205.109.x/24/1512663rewritten
85.206.109.x/24/148764rewritten
85.200.109.x/24/138542rewritten
85.196.109.x/24/122116rewritten
85.220.109.x/24/116677rewritten
85.236.109.x/24/10UNROUTEDrewritten
85.140.109.x/24/928884rewritten
85.76.109.x/24/8719rewritten

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 10 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::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
2001:48d0:101:501::1592001:df0:4:800:21c:c0ff:feb2:ad5fyes
2001:4978:1fb:6400::d22001:df0:4:800:21c:c0ff:feb2:ad5fno
2001:49aa:111:aa00::112001:df0:4:800:21c:c0ff:feb2:ad5fno
fd11:1111:1111::11112001:df0:4:800:21c:c0ff:feb2:ad5fno
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2a00:bba0:12xx::/40/120207375yes
2a00:bba0:12xx::/40/112207375yes
2a00:bba0:12xx::/40/104207375yes
2a00:bba0:12xx::/40/96207375yes
2a00:bba0:12xx::/40/88207375yes
2a00:bba0:12xx::/40/80207375yes
2a00:bba0:12xx::/40/72207375yes
2a00:bba0:12xx::/40/64207375yes
2a00:bba0:12xx::/40/56207375yes
2a00:bba0:12xx::/40/48207375yes
2a00:bba0:12xx::/40/40207375yes
2a00:bba0:92xx::/40/32207375yes
2a00:bb20:12xx::/40/24UNROUTEDyes
2a00:3ba0:12xx::/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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