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Session Report

Summary:
Test run at: 2021-05-30 23:04:11 GMT
Client Prefix (v4): 217.117.233.x/24
Client AS (v4): 16281 (UTELISYS)
IPv4 Probes: 66
Client Prefix (v6): 2a03:a980:xx::/40
Client AS (v6): 16281 (UTELISYS)
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/48

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.

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 (217.117.233.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
217.117.233.x/24/3116281rewritten
217.117.233.x/24/3016281rewritten
217.117.233.x/24/2916281rewritten
217.117.233.x/24/2816281rewritten
217.117.233.x/24/2716281rewritten
217.117.233.x/24/2616281rewritten
217.117.233.x/24/2516281rewritten
217.117.233.x/24/2416281rewritten
217.117.232.x/24/2316281rewritten
217.117.235.x/24/2216281rewritten
217.117.237.x/24/2116281rewritten
217.117.225.x/24/2016281rewritten
217.117.249.x/24/1947954rewritten
217.117.201.x/24/183347rewritten
217.117.169.x/24/174589rewritten
217.117.105.x/24/16UNROUTEDrewritten
217.116.233.x/24/1516245rewritten
217.119.233.x/24/1416350rewritten
217.113.233.x/24/1316342rewritten
217.125.233.x/24/123352rewritten
217.101.233.x/24/1133915rewritten
217.85.233.x/24/103320rewritten
217.53.233.x/24/936992rewritten
217.245.233.x/24/83320rewritten

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
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
2a03:a980:xx::/40/12016281yes
2a03:a980:xx::/40/11216281yes
2a03:a980:xx::/40/10416281yes
2a03:a980:xx::/40/9616281yes
2a03:a980:xx::/40/8816281yes
2a03:a980:xx::/40/8016281yes
2a03:a980:xx::/40/7216281yes
2a03:a980:xx::/40/6416281yes
2a03:a980:xx::/40/5616281yes
2a03:a980:xx::/40/4816281yes
2a03:a980:xx::/40/4016281no
2a03:a980:80xx::/40/3216281no
2a03:a900:xx::/40/2448926no
2a03:2980:xx::/40/1649641no

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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