Logo

Session Report

Summary:
Test run at: 2022-07-06 12:29:52 GMT
Client Prefix (v4): 143.137.71.x/24
Client AS (v4): 262369
IPv4 Probes: 60
Client Prefix (v6): 2804:86c:20xx::/40
Client AS (v6): 262369
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/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 (143.137.71.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
143.137.71.x/24/31262369rewritten
143.137.71.x/24/30262369rewritten
143.137.71.x/24/29262369rewritten
143.137.71.x/24/28262369rewritten
143.137.71.x/24/27262369rewritten
143.137.71.x/24/26262369rewritten
143.137.71.x/24/25262369rewritten
143.137.71.x/24/24262369rewritten
143.137.70.x/24/23262369rewritten
143.137.69.x/24/22262369rewritten
143.137.67.x/24/21263530rewritten
143.137.79.x/24/20263668rewritten
143.137.87.x/24/19262847rewritten
143.137.103.x/24/1852914rewritten
143.137.7.x/24/1761636rewritten
143.137.199.x/24/1661902rewritten
143.136.71.x/24/15UNROUTEDrewritten
143.139.71.x/24/14721rewritten
143.141.71.x/24/13721rewritten
143.129.71.x/24/122611rewritten
143.153.71.x/24/11749rewritten
143.169.71.x/24/102611rewritten
143.201.71.x/24/9UNROUTEDrewritten
143.9.71.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
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::1592001:610:510:115:192:42:115:98yes
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:45a6yes
2001:49aa:111:aa00::112001:630:212:225:225:90ff:fe0c:45a6yes
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
2804:86c:20xx::/40/120262369yes
2804:86c:20xx::/40/112262369yes
2804:86c:20xx::/40/104262369yes
2804:86c:20xx::/40/96262369yes
2804:86c:20xx::/40/88262369yes
2804:86c:20xx::/40/80262369yes
2804:86c:20xx::/40/72262369yes
2804:86c:20xx::/40/64262369yes
2804:86c:20xx::/40/56262369yes
2804:86c:20xx::/40/48262369yes
2804:86c:20xx::/40/40262369yes
2804:86c:a0xx::/40/32262369yes
2804:8ec:20xx::/40/24UNROUTEDno
2804:886c:20xx::/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.
Last Modified