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Session Report

Summary:
Test run at: 2021-01-29 13:10:22 GMT
Client Prefix (v4): 103.156.184.x/24
Client AS (v4): 60614 (TsungYi-Yu)
IPv4 Probes: 66
Client Prefix (v6): 2406:8dc0:22xx::/40
Client AS (v6): 209557 (STEVEYI-ASN)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenblocked
Routable receivedblocked
Largest spoofable neighbor prefix length /28/48

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 (103.156.184.x/24) can spoof 15 neighboring addresses (within your /28 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
103.156.184.x/24/3160614yes
103.156.184.x/24/3060614yes
103.156.184.x/24/2960614yes
103.156.184.x/24/2860614yes
103.156.184.x/24/2760614rewritten
103.156.184.x/24/2660614rewritten
103.156.184.x/24/2560614rewritten
103.156.184.x/24/2460614rewritten
103.156.185.x/24/2360614rewritten
103.156.186.x/24/22UNROUTEDrewritten
103.156.188.x/24/21UNROUTEDrewritten
103.156.176.x/24/20141217rewritten
103.156.168.x/24/19133647rewritten
103.156.152.x/24/18141215rewritten
103.156.248.x/24/1758821rewritten
103.156.56.x/24/16141194rewritten
103.157.184.x/24/1555342rewritten
103.158.184.x/24/14UNROUTEDrewritten
103.152.184.x/24/13140174rewritten
103.148.184.x/24/12140223rewritten
103.140.184.x/24/11138880rewritten
103.188.184.x/24/10UNROUTEDrewritten
103.220.184.x/24/9UNROUTEDrewritten
103.28.184.x/24/8UNROUTEDrewritten

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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 10 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::1592001:630:212:225:225:90ff: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::1592001:770:18:7:225:90ff:fe0c:acb4no
2001:4978:1fb:6400::d22001:770:18:7:225:90ff:fe0c:acb4no
2001:49aa:111:aa00::112001:770:18:7:225:90ff:fe0c:acb4no
fd11:1111:1111::11112001:770:18:7:225:90ff: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
2406:8dc0:22xx::/40/120209557yes
2406:8dc0:22xx::/40/112209557yes
2406:8dc0:22xx::/40/104209557yes
2406:8dc0:22xx::/40/96209557yes
2406:8dc0:22xx::/40/88209557yes
2406:8dc0:22xx::/40/80209557yes
2406:8dc0:22xx::/40/72209557yes
2406:8dc0:22xx::/40/64209557yes
2406:8dc0:22xx::/40/56209557yes
2406:8dc0:22xx::/40/48209557yes
2406:8dc0:22xx::/40/40UNROUTEDno
2406:8dc0:a2xx::/40/32UNROUTEDno
2406:8d40:22xx::/40/24138225no
2406:dc0:22xx::/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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