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Session Report

Summary:
Test run at: 2021-09-24 06:54:11 GMT
Client Prefix (v4): 172.250.66.x/24
Client AS (v4): 20001 (TWC-20001-PACWEST)
IPv4 Probes: 66
Client Prefix (v6): 2603:8001:95xx::/40
Client AS (v6): 20001 (TWC-20001-PACWEST)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA unknownunknown
Routable unknownunknown
Largest spoofable neighbor prefix length nonenone
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 (172.250.66.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
172.250.66.x/24/3120001sendto
172.250.66.x/24/3020001sendto
172.250.66.x/24/2920001sendto
172.250.66.x/24/2820001sendto
172.250.66.x/24/2720001sendto
172.250.66.x/24/2620001sendto
172.250.66.x/24/2520001sendto
172.250.66.x/24/2420001sendto
172.250.67.x/24/2320001sendto
172.250.64.x/24/2220001sendto
172.250.70.x/24/2120001sendto
172.250.74.x/24/2020001sendto
172.250.82.x/24/1920001sendto
172.250.98.x/24/1820001sendto
172.250.2.x/24/1720001sendto
172.250.194.x/24/1620001sendto
172.251.66.x/24/1520001sendto
172.248.66.x/24/1420001sendto
172.254.66.x/24/1312271sendto
172.242.66.x/24/127155sendto
172.234.66.x/24/1120940sendto
172.218.66.x/24/10852sendto
172.186.66.x/24/910310sendto
172.122.66.x/24/82497sendto

Meaning of status in Received column:

sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.

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 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
2603:8001:95xx::/40/12020001sendto
2603:8001:95xx::/40/11220001sendto
2603:8001:95xx::/40/10420001sendto
2603:8001:95xx::/40/9620001sendto
2603:8001:95xx::/40/8820001sendto
2603:8001:95xx::/40/8020001sendto
2603:8001:95xx::/40/7220001sendto
2603:8001:95xx::/40/6420001sendto
2603:8001:95xx::/40/5620001sendto
2603:8001:95xx::/40/4820001sendto
2603:8001:95xx::/40/4020001sendto
2603:8001:15xx::/40/3220001sendto
2603:8081:95xx::/40/2411427sendto
2603:1:95xx::/40/16UNROUTEDsendto

Meaning of status in Received column:

sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.
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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