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Session Report

Summary:
Test run at: 2023-05-26 18:45:51 GMT
Client Prefix (v4): 128.116.205.x/24
Client AS (v4): 35612 (NGI-AS)
IPv4 Probes: 60
Client Prefix (v6): 2a0e:97c0:3xx::/40
Client AS (v6): 198747
IPv6 Probes: 52
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenblocked
Routable receivedblocked
Largest spoofable neighbor prefix length none/64
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 (128.116.205.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
128.116.205.x/24/3135612rewritten
128.116.205.x/24/3035612rewritten
128.116.205.x/24/2935612rewritten
128.116.205.x/24/2835612rewritten
128.116.205.x/24/2735612rewritten
128.116.205.x/24/2635612rewritten
128.116.205.x/24/2535612rewritten
128.116.205.x/24/2435612rewritten
128.116.204.x/24/2335612rewritten
128.116.207.x/24/2235612rewritten
128.116.201.x/24/2135612rewritten
128.116.197.x/24/2035612rewritten
128.116.221.x/24/1935612rewritten
128.116.237.x/24/1835612rewritten
128.116.141.x/24/1735612rewritten
128.116.77.x/24/1622697rewritten
128.117.205.x/24/15194rewritten
128.118.205.x/24/143999rewritten
128.112.205.x/24/1388rewritten
128.124.205.x/24/1221497rewritten
128.100.205.x/24/11239rewritten
128.84.205.x/24/1026rewritten
128.52.205.x/24/93rewritten
128.244.205.x/24/877rewritten

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 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::1592001:40b0:7500:280::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
2a0e:97c0:3xx::/40/120198747yes
2a0e:97c0:3xx::/40/112198747yes
2a0e:97c0:3xx::/40/104198747yes
2a0e:97c0:3xx::/40/96198747yes
2a0e:97c0:3xx::/40/88198747yes
2a0e:97c0:3xx::/40/80198747yes
2a0e:97c0:3xx::/40/72198747yes
2a0e:97c0:3xx::/40/64198747yes
2a0e:97c0:3xx::/40/56198747no
2a0e:97c0:3xx::/40/48198747no
2a0e:97c0:3xx::/40/40UNROUTEDno
2a0e:97c0:83xx::/40/32UNROUTEDno
2a0e:9740:3xx::/40/2451920no
2a0e:17c0:3xx::/40/1659668no

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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