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Session Report

Summary:
Test run at: 2022-04-20 17:50:54 GMT
Client Prefix (v4): 45.165.177.x/24
Client AS (v4): 263067
IPv4 Probes: 60
Client Prefix (v6): 2804:5550:1xx::/40
Client AS (v6): 263067
IPv6 Probes: 56
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/56
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 Adjacent Netblock Testing:

Your host (45.165.177.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
45.165.177.x/24/31263067rewritten
45.165.177.x/24/30263067rewritten
45.165.177.x/24/29263067rewritten
45.165.177.x/24/28263067rewritten
45.165.177.x/24/27263067rewritten
45.165.177.x/24/26263067rewritten
45.165.177.x/24/25263067rewritten
45.165.177.x/24/24263067rewritten
45.165.176.x/24/23263067rewritten
45.165.179.x/24/22263067rewritten
45.165.181.x/24/21UNROUTEDrewritten
45.165.185.x/24/20268695rewritten
45.165.161.x/24/19267961rewritten
45.165.145.x/24/18268682rewritten
45.165.241.x/24/17267980rewritten
45.165.49.x/24/16268657rewritten
45.164.177.x/24/15268645rewritten
45.167.177.x/24/14265553rewritten
45.161.177.x/24/13268470rewritten
45.173.177.x/24/12268818rewritten
45.181.177.x/24/11269189rewritten
45.133.177.x/24/1029424rewritten
45.229.177.x/24/952630rewritten
45.37.177.x/24/811426rewritten

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
2804:5550:1xx::/40/120263067yes
2804:5550:1xx::/40/112263067yes
2804:5550:1xx::/40/104263067yes
2804:5550:1xx::/40/96263067yes
2804:5550:1xx::/40/88263067yes
2804:5550:1xx::/40/80263067yes
2804:5550:1xx::/40/72263067yes
2804:5550:1xx::/40/64263067yes
2804:5550:1xx::/40/56263067yes
2804:5550:1xx::/40/48263067no
2804:5550:1xx::/40/40263067no
2804:5550:81xx::/40/32263067no
2804:55d0:1xx::/40/24267958no
2804:d550:1xx::/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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