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Session Report

Summary:
Test run at: 2021-11-17 00:03:14 GMT
Client Prefix (v4): 138.0.72.x/24
Client AS (v4): 264531
IPv4 Probes: 66
Client Prefix (v6): 2804:2114:11xx::/40
Client AS (v6): 264531
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/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.

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


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
138.0.72.x/24/31264531rewritten
138.0.72.x/24/30264531rewritten
138.0.72.x/24/29264531rewritten
138.0.72.x/24/28264531rewritten
138.0.72.x/24/27264531rewritten
138.0.72.x/24/26264531rewritten
138.0.72.x/24/25264531rewritten
138.0.72.x/24/24264531rewritten
138.0.73.x/24/23264531rewritten
138.0.74.x/24/22264531rewritten
138.0.76.x/24/21264540rewritten
138.0.64.x/24/20262595rewritten
138.0.88.x/24/19264646rewritten
138.0.104.x/24/18262216rewritten
138.0.8.x/24/1752349rewritten
138.0.200.x/24/16263581rewritten
138.1.72.x/24/1531898rewritten
138.2.72.x/24/14UNROUTEDrewritten
138.4.72.x/24/13766rewritten
138.8.72.x/24/12UNROUTEDrewritten
138.16.72.x/24/1111078rewritten
138.32.72.x/24/10UNROUTEDrewritten
138.64.72.x/24/94685rewritten
138.128.72.x/24/855286rewritten

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 able to spoof routable, non-adjacent source addresses through the first 1 IP hop(s).
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
2804:2114:11xx::/40/120264531yes
2804:2114:11xx::/40/112264531yes
2804:2114:11xx::/40/104264531yes
2804:2114:11xx::/40/96264531yes
2804:2114:11xx::/40/88264531yes
2804:2114:11xx::/40/80264531yes
2804:2114:11xx::/40/72264531yes
2804:2114:11xx::/40/64264531yes
2804:2114:11xx::/40/56264531no
2804:2114:11xx::/40/48264531no
2804:2114:11xx::/40/40264531no
2804:2114:91xx::/40/32264531no
2804:2194:11xx::/40/24UNROUTEDno
2804:a114:11xx::/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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