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Session Report

Summary:
Test run at: 2024-03-19 10:37:23 GMT
Client Prefix (v4): 171.212.57.x/24
Client AS (v4): 4134 (CHINANET-BACKBONE)
IPv4 Probes: 66
Client Prefix (v6): 240e:399:69xx::/40
Client AS (v6): 4134 (CHINANET-BACKBONE)
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
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 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 (171.212.57.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
171.212.57.x/24/314134rewritten
171.212.57.x/24/304134rewritten
171.212.57.x/24/294134rewritten
171.212.57.x/24/284134rewritten
171.212.57.x/24/274134rewritten
171.212.57.x/24/264134rewritten
171.212.57.x/24/254134rewritten
171.212.57.x/24/244134rewritten
171.212.56.x/24/234134rewritten
171.212.59.x/24/224134rewritten
171.212.61.x/24/214134rewritten
171.212.49.x/24/204134rewritten
171.212.41.x/24/194134rewritten
171.212.25.x/24/184134rewritten
171.212.121.x/24/174134rewritten
171.212.185.x/24/164134rewritten
171.213.57.x/24/154134rewritten
171.214.57.x/24/144134rewritten
171.208.57.x/24/134134rewritten
171.220.57.x/24/124134rewritten
171.196.57.x/24/11UNROUTEDrewritten
171.244.57.x/24/1038731rewritten
171.148.57.x/24/9UNROUTEDrewritten
171.84.57.x/24/84847rewritten

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
2001:48d0:101:501::1592607:8400:2880:4::80df:9d0dno
2001:4978:1fb:6400::d22607:8400:2880:4::80df:9d0dno
2001:49aa:111:aa00::112607:8400:2880:4::80df:9d0dno
fd11:1111:1111::11112607:8400:2880:4::80df:9d0dno
2001:48d0:101:501::1592607:f278:2:13:da3a:ddff:fe30:ce14no
2001:4978:1fb:6400::d22607:f278:2:13:da3a:ddff:fe30:ce14no
2001:49aa:111:aa00::112607:f278:2:13:da3a:ddff:fe30:ce14no
fd11:1111:1111::11112607:f278:2:13:da3a:ddff:fe30:ce14no
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
240e:399:69xx::/40/1204134yes
240e:399:69xx::/40/1124134yes
240e:399:69xx::/40/1044134yes
240e:399:69xx::/40/964134yes
240e:399:69xx::/40/884134yes
240e:399:69xx::/40/804134yes
240e:399:69xx::/40/724134yes
240e:399:69xx::/40/644134yes
240e:399:69xx::/40/564134no
240e:399:69xx::/40/484134no
240e:399:69xx::/40/404134no
240e:399:e9xx::/40/324134no
240e:319:69xx::/40/244134no
240e:8399:69xx::/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:
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