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Session Report

Summary:
Test run at: 2019-06-27 17:42:28 GMT
Client Prefix (v4): 170.81.185.x/24
Client AS (v4): 264084
IPv4 Probes: 93
Client Prefix (v6): 2804:2a9c:xx::/40
Client AS (v6): 264084
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/56
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 (170.81.185.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
170.81.185.x/24/31264084rewritten
170.81.185.x/24/30264084rewritten
170.81.185.x/24/29264084rewritten
170.81.185.x/24/28264084rewritten
170.81.185.x/24/27264084rewritten
170.81.185.x/24/26264084rewritten
170.81.185.x/24/25264084rewritten
170.81.185.x/24/24264084rewritten
170.81.184.x/24/23264084rewritten
170.81.187.x/24/22264084rewritten
170.81.189.x/24/21266421rewritten
170.81.177.x/24/2028131rewritten
170.81.169.x/24/1928165rewritten
170.81.153.x/24/18266428rewritten
170.81.249.x/24/17266439natblock
170.81.57.x/24/16266408rewritten
170.80.185.x/24/15266382rewritten
170.83.185.x/24/14266487rewritten
170.85.185.x/24/13UNROUTEDrewritten
170.89.185.x/24/12UNROUTEDrewritten
170.65.185.x/24/11UNROUTEDrewritten
170.113.185.x/24/10UNROUTEDrewritten
170.17.185.x/24/93303rewritten
170.209.185.x/24/8UNROUTEDrewritten

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.
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 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::1592001:410:102:1::78no
2001:4978:1fb:6400::d22001:410:102:1::78no
2001:49aa:111:aa00::112001:410:102:1::78no
fd11:1111:1111::11112001:410:102:1::78no
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::1592607:f278:2:13:ba27:ebff:fe3f:b21eno
2001:4978:1fb:6400::d22607:f278:2:13:ba27:ebff:fe3f:b21eno
2001:49aa:111:aa00::112607:f278:2:13:ba27:ebff:fe3f:b21eno
fd11:1111:1111::11112607:f278:2:13:ba27:ebff:fe3f:b21eno
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2804:2a9c:xx::/40/120264084yes
2804:2a9c:xx::/40/112264084yes
2804:2a9c:xx::/40/104264084yes
2804:2a9c:xx::/40/96264084yes
2804:2a9c:xx::/40/88264084yes
2804:2a9c:xx::/40/80264084yes
2804:2a9c:xx::/40/72264084yes
2804:2a9c:xx::/40/64264084yes
2804:2a9c:xx::/40/56264084yes
2804:2a9c:xx::/40/48264084no
2804:2a9c:xx::/40/40264084no
2804:2a9c:80xx::/40/32264084no
2804:2a1c:xx::/40/24UNROUTEDno
2804:aa9c:xx::/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)
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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