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Session Report

Summary:
Test run at: 2022-06-01 03:45:25 GMT
Client Prefix (v4): 76.238.245.x/24
Client AS (v4): 7018 (ATT-INTERNET4)
IPv4 Probes: 60
Client Prefix (v6): 2600:1700:81xx::/40
Client AS (v6): 7018 (ATT-INTERNET4)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedblocked
Routable blockedblocked
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.
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 (76.238.245.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
76.238.245.x/24/317018natblock
76.238.245.x/24/307018natblock
76.238.245.x/24/297018natblock
76.238.245.x/24/287018natblock
76.238.245.x/24/277018natblock
76.238.245.x/24/267018natblock
76.238.245.x/24/257018natblock
76.238.245.x/24/247018natblock
76.238.244.x/24/237018natblock
76.238.247.x/24/227018natblock
76.238.241.x/24/217018natblock
76.238.253.x/24/207018natblock
76.238.229.x/24/197018natblock
76.238.213.x/24/187018natblock
76.238.181.x/24/177018natblock
76.238.117.x/24/167018natblock
76.239.245.x/24/157018natblock
76.236.245.x/24/147018natblock
76.234.245.x/24/137018natblock
76.230.245.x/24/127018natblock
76.254.245.x/24/117018natblock
76.206.245.x/24/107018natblock
76.174.245.x/24/920001natblock
76.110.245.x/24/87922natblock

Meaning of status in Received column:

natblockSpoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.

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::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
2600:1700:81xx::/40/1207018yes
2600:1700:81xx::/40/1127018yes
2600:1700:81xx::/40/1047018yes
2600:1700:81xx::/40/967018yes
2600:1700:81xx::/40/887018yes
2600:1700:81xx::/40/807018yes
2600:1700:81xx::/40/727018yes
2600:1700:81xx::/40/647018yes
2600:1700:81xx::/40/567018no
2600:1700:81xx::/40/487018no
2600:1700:81xx::/40/407018no
2600:1700:1xx::/40/327018no
2600:1780:81xx::/40/24UNROUTEDno
2600:9700:81xx::/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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