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Session Report

Summary:
Test run at: 2021-03-31 11:48:35 GMT
Client Prefix (v4): 131.255.98.x/24
Client AS (v4): 263468
IPv4 Probes: 66
Client Prefix (v6): 2804:124c:4xx::/40
Client AS (v6): 263468
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 (131.255.98.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
131.255.98.x/24/31263468rewritten
131.255.98.x/24/30263468rewritten
131.255.98.x/24/29263468rewritten
131.255.98.x/24/28263468rewritten
131.255.98.x/24/27263468rewritten
131.255.98.x/24/26263468rewritten
131.255.98.x/24/25263468rewritten
131.255.98.x/24/24263468rewritten
131.255.99.x/24/23263468rewritten
131.255.96.x/24/22263468rewritten
131.255.102.x/24/2128165rewritten
131.255.106.x/24/208053rewritten
131.255.114.x/24/19264487rewritten
131.255.66.x/24/18264466rewritten
131.255.34.x/24/17264449rewritten
131.255.226.x/24/16264496rewritten
131.254.98.x/24/151938rewritten
131.253.98.x/24/14UNROUTEDrewritten
131.251.98.x/24/13786rewritten
131.247.98.x/24/125661rewritten
131.239.98.x/24/1114985rewritten
131.223.98.x/24/10UNROUTEDrewritten
131.191.98.x/24/914677rewritten
131.127.98.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::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::1592001:630:212:225:225:90ff: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
2804:124c:4xx::/40/120263468yes
2804:124c:4xx::/40/112263468yes
2804:124c:4xx::/40/104263468yes
2804:124c:4xx::/40/96263468yes
2804:124c:4xx::/40/88263468yes
2804:124c:4xx::/40/80263468yes
2804:124c:4xx::/40/72263468yes
2804:124c:4xx::/40/64263468yes
2804:124c:4xx::/40/56263468yes
2804:124c:4xx::/40/48263468no
2804:124c:4xx::/40/40263468no
2804:124c:84xx::/40/32263468no
2804:12cc:4xx::/40/24263499no
2804:924c:4xx::/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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