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Session Report

Summary:
Test run at: 2022-03-10 23:59:58 GMT
Client Prefix (v4): 94.21.250.x/24
Client AS (v4): 20845 (DIGICABLE)
IPv4 Probes: 60
Client Prefix (v6): 2a01:36c:1xx::/40
Client AS (v6): 20845 (DIGICABLE)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedrewritten
Routable blockedreceived
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 (94.21.250.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
94.21.250.x/24/3120845natblock
94.21.250.x/24/3020845natblock
94.21.250.x/24/2920845natblock
94.21.250.x/24/2820845natblock
94.21.250.x/24/2720845natblock
94.21.250.x/24/2620845natblock
94.21.250.x/24/2520845natblock
94.21.250.x/24/2420845natblock
94.21.251.x/24/2320845natblock
94.21.248.x/24/2220845natblock
94.21.254.x/24/2120845natblock
94.21.242.x/24/2020845natblock
94.21.234.x/24/1920845natblock
94.21.218.x/24/1820845natblock
94.21.186.x/24/1720845natblock
94.21.122.x/24/1620845natblock
94.20.250.x/24/1529049natblock
94.23.250.x/24/1416276natblock
94.17.250.x/24/1312709natblock
94.29.250.x/24/129155natblock
94.5.250.x/24/115607natblock
94.53.250.x/24/1048161natblock
94.85.250.x/24/93269natblock
94.149.250.x/24/89158natblock

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
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2a01:36c:1xx::/40/12020845rewritten
2a01:36c:1xx::/40/11220845rewritten
2a01:36c:1xx::/40/10420845rewritten
2a01:36c:1xx::/40/9620845rewritten
2a01:36c:1xx::/40/8820845rewritten
2a01:36c:1xx::/40/8020845rewritten
2a01:36c:1xx::/40/7220845rewritten
2a01:36c:1xx::/40/6420845rewritten
2a01:36c:1xx::/40/5620845rewritten
2a01:36c:1xx::/40/4820845rewritten
2a01:36c:1xx::/40/4020845rewritten
2a01:36c:81xx::/40/3220845rewritten
2a01:3ec:1xx::/40/24UNROUTEDrewritten
2a01:836c:1xx::/40/16UNROUTEDrewritten

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.
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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