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Session Report

Summary:
Test run at: 2021-07-07 17:49:51 GMT
Client Prefix (v4): 194.105.155.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 blockedblocked
Routable blockedblocked
Largest spoofable neighbor prefix length none/64

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 (194.105.155.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
194.105.155.x/24/3142004natblock
194.105.155.x/24/3042004natblock
194.105.155.x/24/2942004natblock
194.105.155.x/24/2842004natblock
194.105.155.x/24/2742004natblock
194.105.155.x/24/2642004natblock
194.105.155.x/24/2542004natblock
194.105.155.x/24/2442004natblock
194.105.154.x/24/2342004natblock
194.105.153.x/24/2241653natblock
194.105.159.x/24/2153755natblock
194.105.147.x/24/208893natblock
194.105.139.x/24/1915879natblock
194.105.187.x/24/188902natblock
194.105.219.x/24/176820natblock
194.105.27.x/24/1612302natblock
194.104.155.x/24/153214natblock
194.107.155.x/24/148447natblock
194.109.155.x/24/133265natblock
194.97.155.x/24/125539natblock
194.121.155.x/24/111136natblock
194.73.155.x/24/102856natblock
194.41.155.x/24/912511natblock
194.233.155.x/24/839618natblock

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.

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::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
2001:48d0:101:501::1592001:df0:4:800:21c:c0ff:feb2:ad5fno
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
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::/40/5642004no
2a00:19d8:xx::/40/4842004no
2a00:19d8:xx::/40/4042004no
2a00:19d8:80xx::/40/3242004no
2a00:1958:xx::/40/24UNROUTEDno
2a00:99d8:xx::/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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