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Session Report

Summary:
Test run at: 2023-11-11 20:19:30 GMT
Client Prefix (v4): 170.244.2.x/24
Client AS (v4): 52699
IPv4 Probes: 69
Client Prefix (v6): 2804:c64:4dxx::/40
Client AS (v6): 52699
IPv6 Probes: 60
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
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 (170.244.2.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
170.244.2.x/24/3152699rewritten
170.244.2.x/24/3052699rewritten
170.244.2.x/24/2952699rewritten
170.244.2.x/24/2852699rewritten
170.244.2.x/24/2752699rewritten
170.244.2.x/24/2652699rewritten
170.244.2.x/24/2552699rewritten
170.244.2.x/24/2452699rewritten
170.244.3.x/24/2352699rewritten
170.244.0.x/24/2252699rewritten
170.244.6.x/24/21266488rewritten
170.244.10.x/24/20266478rewritten
170.244.18.x/24/19266513rewritten
170.244.34.x/24/18266497rewritten
170.244.66.x/24/17266492rewritten
170.244.130.x/24/16264657rewritten
170.245.2.x/24/1552233rewritten
170.246.2.x/24/14262732rewritten
170.240.2.x/24/13UNROUTEDrewritten
170.252.2.x/24/12UNROUTEDrewritten
170.228.2.x/24/1119524rewritten
170.212.2.x/24/10UNROUTEDrewritten
170.180.2.x/24/911686rewritten
170.116.2.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:c64:4dxx::/40/12052699yes
2804:c64:4dxx::/40/11252699yes
2804:c64:4dxx::/40/10452699yes
2804:c64:4dxx::/40/9652699yes
2804:c64:4dxx::/40/8852699yes
2804:c64:4dxx::/40/8052699yes
2804:c64:4dxx::/40/7252699yes
2804:c64:4dxx::/40/6452699yes
2804:c64:4dxx::/40/5652699yes
2804:c64:4dxx::/40/4852699no
2804:c64:4dxx::/40/4052699no
2804:c64:cdxx::/40/3252699no
2804:ce4:4dxx::/40/2452573no
2804:8c64:4dxx::/40/1661615no

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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