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Session Report

Summary:
Test run at: 2022-01-15 20:14:32 GMT
Client Prefix (v4): 177.137.87.x/24
Client AS (v4): 262700
IPv4 Probes: 63
Client Prefix (v6): 2804:d20:1xx::/40
Client AS (v6): 262700
IPv6 Probes: 52
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/64
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 (177.137.87.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
177.137.87.x/24/31262700rewritten
177.137.87.x/24/30262700rewritten
177.137.87.x/24/29262700rewritten
177.137.87.x/24/28262700rewritten
177.137.87.x/24/27262700rewritten
177.137.87.x/24/26262700rewritten
177.137.87.x/24/25262700rewritten
177.137.87.x/24/24262700rewritten
177.137.86.x/24/23262700rewritten
177.137.85.x/24/22262700rewritten
177.137.83.x/24/21262700rewritten
177.137.95.x/24/2053093rewritten
177.137.71.x/24/1928669rewritten
177.137.119.x/24/1852600rewritten
177.137.23.x/24/1753225rewritten
177.137.215.x/24/16263087rewritten
177.136.87.x/24/15271784rewritten
177.139.87.x/24/1427699rewritten
177.141.87.x/24/1328573rewritten
177.129.87.x/24/12262393rewritten
177.153.87.x/24/1127715rewritten
177.169.87.x/24/1026599rewritten
177.201.87.x/24/98167rewritten
177.9.87.x/24/827699rewritten

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::1592001:610:510:115:192:42:115:98no
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
2804:d20:1xx::/40/120262700yes
2804:d20:1xx::/40/112262700yes
2804:d20:1xx::/40/104262700yes
2804:d20:1xx::/40/96262700yes
2804:d20:1xx::/40/88262700yes
2804:d20:1xx::/40/80262700yes
2804:d20:1xx::/40/72262700yes
2804:d20:1xx::/40/64262700yes
2804:d20:1xx::/40/56262700no
2804:d20:1xx::/40/48262700no
2804:d20:1xx::/40/40262700no
2804:d20:81xx::/40/32262700no
2804:da0:1xx::/40/2428587no
2804:8d20:1xx::/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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