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Session Report

Summary:
Test run at: 2021-11-09 23:05:07 GMT
Client Prefix (v4): 170.238.44.x/24
Client AS (v4): 266317
IPv4 Probes: 66
Client Prefix (v6): 2804:35f4:90xx::/40
Client AS (v6): 266317
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

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


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
170.238.44.x/24/31266317rewritten
170.238.44.x/24/30266317rewritten
170.238.44.x/24/29266317rewritten
170.238.44.x/24/28266317rewritten
170.238.44.x/24/27266317rewritten
170.238.44.x/24/26266317rewritten
170.238.44.x/24/25266317rewritten
170.238.44.x/24/24266317rewritten
170.238.45.x/24/23266317rewritten
170.238.46.x/24/22UNROUTEDrewritten
170.238.40.x/24/21264795rewritten
170.238.36.x/24/20266324rewritten
170.238.60.x/24/1961649rewritten
170.238.12.x/24/18266316rewritten
170.238.108.x/24/17264812rewritten
170.238.172.x/24/16262485rewritten
170.239.44.x/24/15266339rewritten
170.236.44.x/24/14UNROUTEDrewritten
170.234.44.x/24/13UNROUTEDrewritten
170.230.44.x/24/12UNROUTEDrewritten
170.254.44.x/24/11265153rewritten
170.206.44.x/24/10UNROUTEDrewritten
170.174.44.x/24/9UNROUTEDrewritten
170.110.44.x/24/833343rewritten

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: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
2804:35f4:90xx::/40/120266317yes
2804:35f4:90xx::/40/112266317yes
2804:35f4:90xx::/40/104266317yes
2804:35f4:90xx::/40/96266317yes
2804:35f4:90xx::/40/88266317yes
2804:35f4:90xx::/40/80266317yes
2804:35f4:90xx::/40/72266317yes
2804:35f4:90xx::/40/64266317yes
2804:35f4:90xx::/40/56266317yes
2804:35f4:90xx::/40/48266317yes
2804:35f4:90xx::/40/40266317yes
2804:35f4:10xx::/40/32266317yes
2804:3574:90xx::/40/24266287yes
2804:b5f4:90xx::/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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