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Session Report

Summary:
Test run at: 2021-03-29 14:21:43 GMT
Client Prefix (v4): 138.185.246.x/24
Client AS (v4): 263921
IPv4 Probes: 66
Client Prefix (v6): 2804:27c4:ffxx::/40
Client AS (v6): 263921
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedblocked
Routable receivedreceived
Largest spoofable neighbor prefix length /10/16
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 (138.185.246.x/24) can spoof 4194303 neighboring addresses (within your /10 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
138.185.246.x/24/31263921natblock
138.185.246.x/24/30263921natblock
138.185.246.x/24/29263921yes
138.185.246.x/24/28263921yes
138.185.246.x/24/27263921yes
138.185.246.x/24/26263921yes
138.185.246.x/24/25263921yes
138.185.246.x/24/24263921yes
138.185.247.x/24/23263921yes
138.185.244.x/24/22263921yes
138.185.242.x/24/21263920yes
138.185.254.x/24/20263940yes
138.185.230.x/24/19UNROUTEDnatblock
138.185.214.x/24/18262482yes
138.185.182.x/24/1728255yes
138.185.118.x/24/16UNROUTEDnatblock
138.184.246.x/24/15UNROUTEDnatblock
138.187.246.x/24/14UNROUTEDnatblock
138.189.246.x/24/1312511yes
138.177.246.x/24/12UNROUTEDnatblock
138.169.246.x/24/11721yes
138.153.246.x/24/10721yes
138.249.246.x/24/9UNROUTEDnatblock
138.57.246.x/24/8UNROUTEDnatblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
natblockSpoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.

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::1592001:48d0:101:501::242yes
2001:4978:1fb:6400::d22001:48d0:101:501::242yes
2001:49aa:111:aa00::112001:48d0:101:501::242yes
fd11:1111:1111::11112001:48d0:101:501::242no
2001:48d0:101:501::1592001:48d0:101:501::247yes
2001:4978:1fb:6400::d22001:48d0:101:501::247yes
2001:49aa:111:aa00::112001:48d0:101:501::247yes
fd11:1111:1111::11112001:48d0:101:501::247no
2001:48d0:101:501::1592001:630:212:225:225:90ff:fe0c:45a6yes
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:acb4yes
2001:4978:1fb:6400::d22001:770:1c:7:225:90ff:fe0c:acb4yes
2001:49aa:111:aa00::112001:770:1c:7:225:90ff:fe0c:acb4yes
fd11:1111:1111::11112001:770:1c:7:225:90ff:fe0c:acb4no
2001:48d0:101:501::1592001:df0:4:800:21c:c0ff:feb2:ad5fyes
2001:4978:1fb:6400::d22001:df0:4:800:21c:c0ff:feb2:ad5fyes
2001:49aa:111:aa00::112001:df0:4:800:21c:c0ff:feb2:ad5fyes
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
2804:27c4:ffxx::/40/120263921yes
2804:27c4:ffxx::/40/112263921yes
2804:27c4:ffxx::/40/104263921yes
2804:27c4:ffxx::/40/96263921yes
2804:27c4:ffxx::/40/88263921yes
2804:27c4:ffxx::/40/80263921yes
2804:27c4:ffxx::/40/72263921yes
2804:27c4:ffxx::/40/64263921yes
2804:27c4:ffxx::/40/56263921yes
2804:27c4:ffxx::/40/48263921yes
2804:27c4:ffxx::/40/40263921yes
2804:27c4:7fxx::/40/32263921yes
2804:2744:ffxx::/40/24263888yes
2804:a7c4:ffxx::/40/16UNROUTEDyes

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received
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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