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Session Report

Summary:
Test run at: 2021-06-11 14:53:32 GMT
Client Prefix (v4): 170.246.237.x/24
Client AS (v4): 61678
IPv4 Probes: 66
Client Prefix (v6): 2804:1cd4:89xx::/40
Client AS (v6): 61678
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenblocked
Routable rewrittenreceived
Largest spoofable neighbor prefix length none/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 (170.246.237.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
170.246.237.x/24/3161678rewritten
170.246.237.x/24/3061678rewritten
170.246.237.x/24/2961678rewritten
170.246.237.x/24/2861678rewritten
170.246.237.x/24/2761678rewritten
170.246.237.x/24/2661678rewritten
170.246.237.x/24/2561678rewritten
170.246.237.x/24/2461678rewritten
170.246.236.x/24/2361678rewritten
170.246.239.x/24/2261678rewritten
170.246.233.x/24/2161797rewritten
170.246.229.x/24/20263646rewritten
170.246.253.x/24/19266031rewritten
170.246.205.x/24/18262683rewritten
170.246.173.x/24/17265656rewritten
170.246.109.x/24/16265141rewritten
170.247.237.x/24/1561792rewritten
170.244.237.x/24/14263057rewritten
170.242.237.x/24/13UNROUTEDrewritten
170.254.237.x/24/12271007rewritten
170.230.237.x/24/11UNROUTEDrewritten
170.214.237.x/24/10UNROUTEDrewritten
170.182.237.x/24/9UNROUTEDrewritten
170.118.237.x/24/8UNROUTEDrewritten

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 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::1592001:48d0:101:501::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::1592001:610:510:115:192:42:115:98yes
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: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
2804:1cd4:89xx::/40/12061678yes
2804:1cd4:89xx::/40/11261678yes
2804:1cd4:89xx::/40/10461678yes
2804:1cd4:89xx::/40/9661678yes
2804:1cd4:89xx::/40/8861678yes
2804:1cd4:89xx::/40/8061678yes
2804:1cd4:89xx::/40/7261678yes
2804:1cd4:89xx::/40/6461678yes
2804:1cd4:89xx::/40/5661678yes
2804:1cd4:89xx::/40/4861678yes
2804:1cd4:89xx::/40/4061678yes
2804:1cd4:9xx::/40/3261678yes
2804:1c54:89xx::/40/2461650yes
2804:9cd4:89xx::/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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