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Session Report

Summary:
Test run at: 2021-10-27 12:11:51 GMT
Client Prefix (v4): 177.85.191.x/24
Client AS (v4): 52558
IPv4 Probes: 66
Client Prefix (v6): 2804:cd4:b1xx::/40
Client AS (v6): 52558
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 (177.85.191.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
177.85.191.x/24/3152558rewritten
177.85.191.x/24/3052558rewritten
177.85.191.x/24/2952558rewritten
177.85.191.x/24/2852558rewritten
177.85.191.x/24/2752558rewritten
177.85.191.x/24/2652558rewritten
177.85.191.x/24/2552558rewritten
177.85.191.x/24/2452558rewritten
177.85.190.x/24/2352558rewritten
177.85.189.x/24/2252558rewritten
177.85.187.x/24/21270787rewritten
177.85.183.x/24/20262611rewritten
177.85.175.x/24/1952746rewritten
177.85.159.x/24/1852564rewritten
177.85.255.x/24/1752556rewritten
177.85.63.x/24/1652737rewritten
177.84.191.x/24/1553082rewritten
177.87.191.x/24/14262907rewritten
177.81.191.x/24/1328573rewritten
177.93.191.x/24/12263166rewritten
177.69.191.x/24/1116735rewritten
177.117.191.x/24/1026599rewritten
177.21.191.x/24/9262876rewritten
177.213.191.x/24/826599rewritten

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::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:cd4:b1xx::/40/12052558yes
2804:cd4:b1xx::/40/11252558yes
2804:cd4:b1xx::/40/10452558yes
2804:cd4:b1xx::/40/9652558yes
2804:cd4:b1xx::/40/8852558yes
2804:cd4:b1xx::/40/8052558yes
2804:cd4:b1xx::/40/7252558yes
2804:cd4:b1xx::/40/6452558yes
2804:cd4:b1xx::/40/5652558yes
2804:cd4:b1xx::/40/4852558yes
2804:cd4:b1xx::/40/4052558yes
2804:cd4:31xx::/40/3252558yes
2804:c54:b1xx::/40/24262650yes
2804:8cd4:b1xx::/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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