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Session Report

Summary:
Test run at: 2021-06-01 00:48:34 GMT
Client Prefix (v4): 108.162.121.x/24
Client AS (v4): 7992 (COGECOWAVE)
IPv4 Probes: 66
Client Prefix (v6): 2001:1970:4bxx::/40
Client AS (v6): 7992 (COGECOWAVE)
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/104
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 (108.162.121.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
108.162.121.x/24/317992rewritten
108.162.121.x/24/307992rewritten
108.162.121.x/24/297992rewritten
108.162.121.x/24/287992rewritten
108.162.121.x/24/277992rewritten
108.162.121.x/24/267992rewritten
108.162.121.x/24/257992rewritten
108.162.121.x/24/247992rewritten
108.162.120.x/24/237992rewritten
108.162.123.x/24/227992rewritten
108.162.125.x/24/217992rewritten
108.162.113.x/24/207992rewritten
108.162.105.x/24/197992rewritten
108.162.89.x/24/187992rewritten
108.162.57.x/24/176128rewritten
108.162.249.x/24/1613335rewritten
108.163.121.x/24/15UNROUTEDrewritten
108.160.121.x/24/1432798rewritten
108.166.121.x/24/1319994rewritten
108.170.121.x/24/126128rewritten
108.178.121.x/24/1111427rewritten
108.130.121.x/24/1016509rewritten
108.226.121.x/24/97018rewritten
108.34.121.x/24/8701rewritten

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 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::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
2001:1970:4bxx::/40/1207992yes
2001:1970:4bxx::/40/1127992yes
2001:1970:4bxx::/40/1047992yes
2001:1970:4bxx::/40/967992no
2001:1970:4bxx::/40/887992rewritten
2001:1970:4bxx::/40/807992no
2001:1970:4bxx::/40/727992no
2001:1970:4bxx::/40/647992no
2001:1970:4bxx::/40/567992rewritten
2001:1970:4bxx::/40/487992no
2001:1970:4bxx::/40/407992rewritten
2001:1970:cbxx::/40/327992no
2001:19f0:4bxx::/40/24UNROUTEDrewritten
2001:9970:4bxx::/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)
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.
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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