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Session Report

Summary:
Test run at: 2022-04-02 06:42:14 GMT
Client Prefix (v4): 121.74.180.x/24
Client AS (v4): 9500 (VODAFONE-TRANSIT-AS)
IPv4 Probes: 60
Client Prefix (v6): 2407:7000:9fxx::/40
Client AS (v6): 9500 (VODAFONE-TRANSIT-AS)
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/56
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 (121.74.180.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
121.74.180.x/24/319500rewritten
121.74.180.x/24/309500rewritten
121.74.180.x/24/299500rewritten
121.74.180.x/24/289500rewritten
121.74.180.x/24/279500rewritten
121.74.180.x/24/269500rewritten
121.74.180.x/24/259500rewritten
121.74.180.x/24/249500rewritten
121.74.181.x/24/239500rewritten
121.74.182.x/24/229500rewritten
121.74.176.x/24/219500rewritten
121.74.188.x/24/209500rewritten
121.74.164.x/24/199500rewritten
121.74.148.x/24/189500rewritten
121.74.244.x/24/179500rewritten
121.74.52.x/24/169500rewritten
121.75.180.x/24/159500rewritten
121.72.180.x/24/144768rewritten
121.78.180.x/24/139286rewritten
121.66.180.x/24/123786rewritten
121.90.180.x/24/119500rewritten
121.106.180.x/24/102516rewritten
121.10.180.x/24/94134rewritten
121.202.180.x/24/817924rewritten

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
2407:7000:9fxx::/40/1209500yes
2407:7000:9fxx::/40/1129500yes
2407:7000:9fxx::/40/1049500yes
2407:7000:9fxx::/40/969500yes
2407:7000:9fxx::/40/889500yes
2407:7000:9fxx::/40/809500yes
2407:7000:9fxx::/40/729500yes
2407:7000:9fxx::/40/649500yes
2407:7000:9fxx::/40/569500yes
2407:7000:9fxx::/40/489500no
2407:7000:9fxx::/40/409500no
2407:7000:1fxx::/40/329500no
2407:7080:9fxx::/40/24UNROUTEDno
2407:f000:9fxx::/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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