Logo

Session Report

Summary:
Test run at: 2022-04-14 12:03:48 GMT
Client Prefix (v4): 138.99.103.x/24
Client AS (v4): 263750
IPv4 Probes: 60
Client Prefix (v6): 2803:a040:1xx::/40
Client AS (v6): 263750
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

Meaning of result status in column:

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 (138.99.103.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
138.99.103.x/24/31263750rewritten
138.99.103.x/24/30263750rewritten
138.99.103.x/24/29263750rewritten
138.99.103.x/24/28263750rewritten
138.99.103.x/24/27263750rewritten
138.99.103.x/24/26263750rewritten
138.99.103.x/24/25263750rewritten
138.99.103.x/24/24263750rewritten
138.99.102.x/24/23263750rewritten
138.99.101.x/24/22263750rewritten
138.99.99.x/24/2128657rewritten
138.99.111.x/24/2052747rewritten
138.99.119.x/24/1953233rewritten
138.99.71.x/24/18264160rewritten
138.99.39.x/24/17263740rewritten
138.99.231.x/24/16270744rewritten
138.98.103.x/24/15UNROUTEDrewritten
138.97.103.x/24/14264181rewritten
138.103.103.x/24/137046rewritten
138.107.103.x/24/122497rewritten
138.115.103.x/24/11270rewritten
138.67.103.x/24/1036704rewritten
138.35.103.x/24/9UNROUTEDrewritten
138.227.103.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::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
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2803:a040:1xx::/40/120263750yes
2803:a040:1xx::/40/112263750yes
2803:a040:1xx::/40/104263750yes
2803:a040:1xx::/40/96263750yes
2803:a040:1xx::/40/88263750yes
2803:a040:1xx::/40/80263750yes
2803:a040:1xx::/40/72263750yes
2803:a040:1xx::/40/64263750yes
2803:a040:1xx::/40/56263750yes
2803:a040:1xx::/40/48263750yes
2803:a040:1xx::/40/40263750yes
2803:a040:81xx::/40/32263750yes
2803:a0c0:1xx::/40/24UNROUTEDyes
2803:2040:1xx::/40/1628050yes

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.
Last Modified