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Session Report

Summary:
Test run at: 2021-12-08 09:50:44 GMT
Client Prefix (v4): 91.151.6.x/24
Client AS (v4): 42004 (ULGRP-AS)
IPv4 Probes: 66
Client Prefix (v6): 2a00:19d8:xx::/40
Client AS (v6): 42004 (ULGRP-AS)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedreceived
Routable blockedreceived
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.
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 (91.151.6.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
91.151.6.x/24/3142004natblock
91.151.6.x/24/3042004natblock
91.151.6.x/24/2942004natblock
91.151.6.x/24/2842004natblock
91.151.6.x/24/2742004natblock
91.151.6.x/24/2642004natblock
91.151.6.x/24/2542004natblock
91.151.6.x/24/2442004natblock
91.151.7.x/24/2342004natblock
91.151.4.x/24/2242004natblock
91.151.2.x/24/2142004natblock
91.151.14.x/24/2042004natblock
91.151.22.x/24/19UNROUTEDnatblock
91.151.38.x/24/1812958natblock
91.151.70.x/24/1712826natblock
91.151.134.x/24/1642082natblock
91.150.6.x/24/1542343natblock
91.149.6.x/24/142116sendto
91.147.6.x/24/1312389sendto
91.159.6.x/24/12719sendto
91.135.6.x/24/1112496sendto
91.183.6.x/24/105432sendto
91.215.6.x/24/941153sendto
91.23.6.x/24/83320sendto

Meaning of status in Received column:

natblockSpoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.
sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.

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 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
2a00:19d8:xx::/40/12042004yes
2a00:19d8:xx::/40/11242004yes
2a00:19d8:xx::/40/10442004yes
2a00:19d8:xx::/40/9642004yes
2a00:19d8:xx::/40/8842004yes
2a00:19d8:xx::/40/8042004yes
2a00:19d8:xx::/40/7242004yes
2a00:19d8:xx::/40/6442004yes
2a00:19d8:xx::/40/5642004yes
2a00:19d8:xx::/40/4842004yes
2a00:19d8:xx::/40/4042004yes
2a00:19d8:80xx::/40/3242004yes
2a00:1958:xx::/40/24UNROUTEDyes
2a00:99d8:xx::/40/16UNROUTEDyes

Meaning of status in Received column:

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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