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Session Report

Summary:
Test run at: 2023-03-13 14:11:45 GMT
Client Prefix (v4): 109.250.8.x/24
Client AS (v4): 8881 (VERSATEL)
IPv4 Probes: 57
Client Prefix (v6): 2001:9e8:34xx::/40
Client AS (v6): 8881 (VERSATEL)
IPv6 Probes: 52
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA unknownblocked
Routable unknownblocked
Largest spoofable neighbor prefix length none/120
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.
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 (109.250.8.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
109.250.8.x/24/318881sendto
109.250.8.x/24/308881sendto
109.250.8.x/24/298881sendto
109.250.8.x/24/288881sendto
109.250.8.x/24/278881sendto
109.250.8.x/24/268881sendto
109.250.8.x/24/258881sendto
109.250.8.x/24/248881sendto
109.250.9.x/24/238881sendto
109.250.10.x/24/228881sendto
109.250.12.x/24/218881sendto
109.250.0.x/24/208881natblock
109.250.24.x/24/198881sendto
109.250.40.x/24/188881sendto
109.250.72.x/24/178881sendto
109.250.136.x/24/168881sendto
109.251.8.x/24/1531148sendto
109.248.8.x/24/14210195sendto
109.254.8.x/24/1320590sendto
109.242.8.x/24/1225472sendto
109.234.8.x/24/1139045sendto
109.218.8.x/24/103215sendto
109.186.8.x/24/91680sendto
109.122.8.x/24/834661sendto

Meaning of status in Received column:

natblockSpoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.
sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.

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::1592001:40b0:7500:280::5458:517ano
2001:4978:1fb:6400::d22001:40b0:7500:280::5458:517ano
2001:49aa:111:aa00::112001:40b0:7500:280::5458:517ano
fd11:1111:1111::11112001:40b0:7500:280::5458:517ano
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
2001:9e8:34xx::/40/1208881yes
2001:9e8:34xx::/40/1128881no
2001:9e8:34xx::/40/1048881no
2001:9e8:34xx::/40/968881no
2001:9e8:34xx::/40/888881no
2001:9e8:34xx::/40/808881no
2001:9e8:34xx::/40/728881no
2001:9e8:34xx::/40/648881no
2001:9e8:34xx::/40/568881no
2001:9e8:34xx::/40/488881no
2001:9e8:34xx::/40/408881no
2001:9e8:b4xx::/40/328881no
2001:968:34xx::/40/2424875no
2001:89e8:34xx::/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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