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Session Report

Summary:
Test run at: 2021-07-17 14:35:07 GMT
Client Prefix (v4): 191.37.139.x/24
Client AS (v4): 263360
IPv4 Probes: 66
Client Prefix (v6): 2804:14f0:10xx::/40
Client AS (v6): 263360
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenblocked
Routable rewrittenreceived
Largest spoofable neighbor prefix length none/32
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 (191.37.139.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
191.37.139.x/24/31263360rewritten
191.37.139.x/24/30263360rewritten
191.37.139.x/24/29263360rewritten
191.37.139.x/24/28263360rewritten
191.37.139.x/24/27263360rewritten
191.37.139.x/24/26263360rewritten
191.37.139.x/24/25263360rewritten
191.37.139.x/24/24263360rewritten
191.37.138.x/24/23263360rewritten
191.37.137.x/24/22263360rewritten
191.37.143.x/24/21266387rewritten
191.37.131.x/24/20263359rewritten
191.37.155.x/24/19263362rewritten
191.37.171.x/24/18271023rewritten
191.37.203.x/24/17263371rewritten
191.37.11.x/24/16263348rewritten
191.36.139.x/24/15263335rewritten
191.39.139.x/24/1453037rewritten
191.33.139.x/24/1318881rewritten
191.45.139.x/24/127738rewritten
191.53.139.x/24/1128202rewritten
191.5.139.x/24/10263536rewritten
191.101.139.x/24/961317rewritten
191.165.139.x/24/826615rewritten

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::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::247yes
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::1592001:610:510:115:192:42:115:98yes
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
2804:14f0:10xx::/40/120263360yes
2804:14f0:10xx::/40/112263360yes
2804:14f0:10xx::/40/104263360yes
2804:14f0:10xx::/40/96263360yes
2804:14f0:10xx::/40/88263360yes
2804:14f0:10xx::/40/80263360yes
2804:14f0:10xx::/40/72263360yes
2804:14f0:10xx::/40/64263360yes
2804:14f0:10xx::/40/56263360yes
2804:14f0:10xx::/40/48263360yes
2804:14f0:10xx::/40/40263360yes
2804:14f0:90xx::/40/32263360yes
2804:1470:10xx::/40/24UNROUTEDno
2804:94f0:10xx::/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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