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Session Report

Summary:
Test run at: 2021-11-24 10:39:49 GMT
Client Prefix (v4): 138.59.121.x/24
Client AS (v4): 28210
IPv4 Probes: 66
Client Prefix (v6): 2804:d45:98xx::/40
Client AS (v6): 7738
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

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


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
138.59.121.x/24/3128210rewritten
138.59.121.x/24/3028210rewritten
138.59.121.x/24/2928210rewritten
138.59.121.x/24/2828210rewritten
138.59.121.x/24/2728210rewritten
138.59.121.x/24/2628210rewritten
138.59.121.x/24/2528210rewritten
138.59.121.x/24/2428210rewritten
138.59.120.x/24/2328210rewritten
138.59.123.x/24/2228210rewritten
138.59.125.x/24/2161588rewritten
138.59.113.x/24/2028606rewritten
138.59.105.x/24/19262756rewritten
138.59.89.x/24/1822689rewritten
138.59.57.x/24/1752887rewritten
138.59.249.x/24/1652858rewritten
138.58.121.x/24/15UNROUTEDrewritten
138.57.121.x/24/14UNROUTEDrewritten
138.63.121.x/24/131715rewritten
138.51.121.x/24/12239rewritten
138.43.121.x/24/1163436rewritten
138.27.121.x/24/101464rewritten
138.123.121.x/24/946887rewritten
138.187.121.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:d45:98xx::/40/1207738yes
2804:d45:98xx::/40/1127738yes
2804:d45:98xx::/40/1047738yes
2804:d45:98xx::/40/967738yes
2804:d45:98xx::/40/887738yes
2804:d45:98xx::/40/807738yes
2804:d45:98xx::/40/727738yes
2804:d45:98xx::/40/647738yes
2804:d45:98xx::/40/567738yes
2804:d45:98xx::/40/487738no
2804:d45:98xx::/40/407738no
2804:d45:18xx::/40/327738no
2804:dc5:98xx::/40/24UNROUTEDno
2804:8d45:98xx::/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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