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Session Report

Summary:
Test run at: 2021-07-07 14:15:05 GMT
Client Prefix (v4): 181.191.103.x/24
Client AS (v4): 266012
IPv4 Probes: 66
Client Prefix (v6): 2804:328:d0xx::/40
Client AS (v6): 262868
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenreceived
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 (181.191.103.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
181.191.103.x/24/31266012rewritten
181.191.103.x/24/30266012rewritten
181.191.103.x/24/29266012rewritten
181.191.103.x/24/28266012rewritten
181.191.103.x/24/27266012rewritten
181.191.103.x/24/26266012rewritten
181.191.103.x/24/25266012rewritten
181.191.103.x/24/24266012rewritten
181.191.102.x/24/23266012rewritten
181.191.101.x/24/22266012rewritten
181.191.99.x/24/21266003rewritten
181.191.111.x/24/20266004rewritten
181.191.119.x/24/19267423rewritten
181.191.71.x/24/18265779rewritten
181.191.39.x/24/17266767rewritten
181.191.231.x/24/16267449rewritten
181.190.103.x/24/1514259rewritten
181.189.103.x/24/14UNROUTEDrewritten
181.187.103.x/24/13UNROUTEDrewritten
181.183.103.x/24/12UNROUTEDrewritten
181.175.103.x/24/1114522rewritten
181.159.103.x/24/1026611rewritten
181.255.103.x/24/926611rewritten
181.63.103.x/24/810620rewritten

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::242yes
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::247yes
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: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:ad5fyes
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
2804:328:d0xx::/40/120262868yes
2804:328:d0xx::/40/112262868yes
2804:328:d0xx::/40/104262868yes
2804:328:d0xx::/40/96262868yes
2804:328:d0xx::/40/88262868yes
2804:328:d0xx::/40/80262868yes
2804:328:d0xx::/40/72262868yes
2804:328:d0xx::/40/64262868yes
2804:328:d0xx::/40/56262868yes
2804:328:d0xx::/40/48262868yes
2804:328:d0xx::/40/40262868yes
2804:328:50xx::/40/32262868yes
2804:3a8:d0xx::/40/2453195yes
2804:8328:d0xx::/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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