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Session Report

Summary:
Test run at: 2021-12-01 02:26:53 GMT
Client Prefix (v4): 202.112.0.x/24
Client AS (v4): 4538 (ERX-CERNET-BKB)
IPv4 Probes: 66
Client Prefix (v6): 2001:da8:ffxx::/40
Client AS (v6): 23910 (CNGI-CERNET2-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 /8/32

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 (202.112.0.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
202.112.0.x/24/314538yes
202.112.0.x/24/304538yes
202.112.0.x/24/294538yes
202.112.0.x/24/284538yes
202.112.0.x/24/274538yes
202.112.0.x/24/264538yes
202.112.0.x/24/254538yes
202.112.0.x/24/244538yes
202.112.1.x/24/234538yes
202.112.2.x/24/224538yes
202.112.4.x/24/214538yes
202.112.8.x/24/2024349yes
202.112.16.x/24/1924355yes
202.112.32.x/24/184538yes
202.112.64.x/24/174538yes
202.112.128.x/24/164538yes
202.113.0.x/24/154538yes
202.114.0.x/24/144538yes
202.116.0.x/24/134538yes
202.120.0.x/24/124538yes
202.96.0.x/24/114808yes
202.80.0.x/24/104058yes
202.48.0.x/24/9UNROUTEDyes
202.240.0.x/24/8UNROUTEDyes

Meaning of status in Received column:

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 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::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::1592001:610:510:115:192:42:115:98yes
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:45a6yes
2001:4978:1fb:6400::d22001:630:212:225:225:90ff:fe0c:45a6yes
2001:49aa:111:aa00::112001:630:212:225:225:90ff:fe0c:45a6yes
fd11:1111:1111::11112001:630:212:225:225:90ff:fe0c:45a6no
2001:48d0:101:501::1592001:770:1c:7:225:90ff:fe0c:acb4yes
2001:4978:1fb:6400::d22001:770:1c:7:225:90ff:fe0c:acb4yes
2001:49aa:111:aa00::112001:770:1c:7:225:90ff:fe0c:acb4yes
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
2001:da8:ffxx::/40/12023910yes
2001:da8:ffxx::/40/11223910yes
2001:da8:ffxx::/40/10423910yes
2001:da8:ffxx::/40/9623910yes
2001:da8:ffxx::/40/8823910yes
2001:da8:ffxx::/40/8023910yes
2001:da8:ffxx::/40/7223910yes
2001:da8:ffxx::/40/6423910yes
2001:da8:ffxx::/40/5623910yes
2001:da8:ffxx::/40/4823910yes
2001:da8:ffxx::/40/4023910yes
2001:da8:7fxx::/40/3223910yes
2001:d28:ffxx::/40/249621no
2001:8da8:ffxx::/40/161221no

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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