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Session Report

Summary:
Test run at: 2021-09-30 13:55:56 GMT
Client Prefix (v4): 177.38.28.x/24
Client AS (v4): 262908
IPv4 Probes: 66
Client Prefix (v6): 2804:3c8:axx::/40
Client AS (v6): 262908
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenblocked
Routable rewrittenreceived
Largest spoofable neighbor prefix length none/24

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


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
177.38.28.x/24/31262908rewritten
177.38.28.x/24/30262908rewritten
177.38.28.x/24/29262908rewritten
177.38.28.x/24/28262908rewritten
177.38.28.x/24/27262908rewritten
177.38.28.x/24/26262908rewritten
177.38.28.x/24/25262908rewritten
177.38.28.x/24/24262908rewritten
177.38.29.x/24/23262908rewritten
177.38.30.x/24/22262908rewritten
177.38.24.x/24/21262908rewritten
177.38.20.x/24/2052787rewritten
177.38.12.x/24/19262893rewritten
177.38.60.x/24/1852944rewritten
177.38.92.x/24/17262402rewritten
177.38.156.x/24/1652751rewritten
177.39.28.x/24/15UNROUTEDrewritten
177.36.28.x/24/14271043rewritten
177.34.28.x/24/1328573rewritten
177.46.28.x/24/1228135rewritten
177.54.28.x/24/11262447rewritten
177.6.28.x/24/108167rewritten
177.102.28.x/24/927699rewritten
177.166.28.x/24/826615rewritten

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 able to spoof routable, non-adjacent source addresses through the first 1 IP hop(s).
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::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::247yes
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::1592001:610:510:115:192:42:115:98yes
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
2804:3c8:axx::/40/120262908yes
2804:3c8:axx::/40/112262908yes
2804:3c8:axx::/40/104262908yes
2804:3c8:axx::/40/96262908yes
2804:3c8:axx::/40/88262908yes
2804:3c8:axx::/40/80262908yes
2804:3c8:axx::/40/72262908yes
2804:3c8:axx::/40/64262908yes
2804:3c8:axx::/40/56262908no
2804:3c8:axx::/40/48262908no
2804:3c8:axx::/40/40262908no
2804:3c8:8axx::/40/32262908no
2804:348:axx::/40/2428133yes
2804:83c8:axx::/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
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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