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Session Report

Summary:
Test run at: 2022-04-06 07:04:46 GMT
Client Prefix (v4): 138.99.251.x/24
Client AS (v4): 28130
IPv4 Probes: 60
Client Prefix (v6): 2804:2b8:23xx::/40
Client AS (v6): 28130
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/64
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 (138.99.251.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
138.99.251.x/24/3128130rewritten
138.99.251.x/24/3028130rewritten
138.99.251.x/24/2928130rewritten
138.99.251.x/24/2828130rewritten
138.99.251.x/24/2728130rewritten
138.99.251.x/24/2628130rewritten
138.99.251.x/24/2528130rewritten
138.99.251.x/24/2428130rewritten
138.99.250.x/24/2328130rewritten
138.99.249.x/24/2228130rewritten
138.99.255.x/24/21263589rewritten
138.99.243.x/24/2028198rewritten
138.99.235.x/24/19262307rewritten
138.99.219.x/24/1828098rewritten
138.99.187.x/24/17263244rewritten
138.99.123.x/24/1661317rewritten
138.98.251.x/24/15UNROUTEDrewritten
138.97.251.x/24/14264821rewritten
138.103.251.x/24/137046rewritten
138.107.251.x/24/122497rewritten
138.115.251.x/24/11270rewritten
138.67.251.x/24/1036704rewritten
138.35.251.x/24/9UNROUTEDrewritten
138.227.251.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::1592001:610:510:115:192:42:115:98no
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: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
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2804:2b8:23xx::/40/12028130yes
2804:2b8:23xx::/40/11228130yes
2804:2b8:23xx::/40/10428130yes
2804:2b8:23xx::/40/9628130yes
2804:2b8:23xx::/40/8828130yes
2804:2b8:23xx::/40/8028130yes
2804:2b8:23xx::/40/7228130yes
2804:2b8:23xx::/40/6428130yes
2804:2b8:23xx::/40/5628130no
2804:2b8:23xx::/40/4828130no
2804:2b8:23xx::/40/4028130no
2804:2b8:a3xx::/40/3228130no
2804:238:23xx::/40/2423106no
2804:82b8:23xx::/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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