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Session Report

Summary:
Test run at: 2021-02-24 08:14:04 GMT
Client Prefix (v4): 183.173.166.x/24
Client AS (v4): 4538 (ERX-CERNET-BKB)
IPv4 Probes: 66
Client Prefix (v6): 2402:f000:xx::/40
Client AS (v6): 45576 (CERNET2-TSINGHUA6-AS-AP)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedblocked
Routable receivedreceived
Largest spoofable neighbor prefix length /15/32

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 (183.173.166.x/24) can spoof 131071 neighboring addresses (within your /15 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
183.173.166.x/24/314538yes
183.173.166.x/24/304538yes
183.173.166.x/24/294538yes
183.173.166.x/24/284538yes
183.173.166.x/24/274538yes
183.173.166.x/24/264538yes
183.173.166.x/24/254538yes
183.173.166.x/24/244538yes
183.173.167.x/24/234538yes
183.173.164.x/24/224538yes
183.173.162.x/24/214538yes
183.173.174.x/24/204538yes
183.173.182.x/24/194538yes
183.173.134.x/24/184538yes
183.173.230.x/24/174538yes
183.173.38.x/24/1624348yes
183.172.166.x/24/154538yes
183.175.166.x/24/144538no
183.169.166.x/24/134538no
183.165.166.x/24/124134no
183.189.166.x/24/114837no
183.141.166.x/24/104134no
183.237.166.x/24/956040no
183.45.166.x/24/84134no

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
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)

IPv4 Outbound Filtering Depth:

The tracefilter test found your host able to spoof routable, non-adjacent source addresses through the first 2 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::242yes
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::247yes
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: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:df0:4:800:21c:c0ff:feb2:ad5fyes
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
2402:f000:xx::/40/12045576yes
2402:f000:xx::/40/11245576yes
2402:f000:xx::/40/10445576yes
2402:f000:xx::/40/9645576yes
2402:f000:xx::/40/8845576yes
2402:f000:xx::/40/8045576yes
2402:f000:xx::/40/7245576yes
2402:f000:xx::/40/6445576yes
2402:f000:xx::/40/5645576yes
2402:f000:xx::/40/4845576yes
2402:f000:xx::/40/4045576yes
2402:f000:80xx::/40/3245576yes
2402:f080:xx::/40/2438150no
2402:7000: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:
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