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Session Report

Summary:
Test run at: 2023-11-29 12:20:17 GMT
Client Prefix (v4): 81.144.242.x/24
Client AS (v4): 2856 (BT-UK-AS)
IPv4 Probes: 69
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length none
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 (81.144.242.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
81.144.242.x/24/312856natblock
81.144.242.x/24/302856natblock
81.144.242.x/24/292856natblock
81.144.242.x/24/282856natblock
81.144.242.x/24/272856natblock
81.144.242.x/24/262856natblock
81.144.242.x/24/252856natblock
81.144.242.x/24/242856natblock
81.144.243.x/24/232856natblock
81.144.240.x/24/222856natblock
81.144.246.x/24/212856natblock
81.144.250.x/24/202856natblock
81.144.226.x/24/192856natblock
81.144.210.x/24/182856natblock
81.144.178.x/24/172856natblock
81.144.114.x/24/162856natblock
81.145.242.x/24/152856natblock
81.146.242.x/24/142856natblock
81.148.242.x/24/132856natblock
81.152.242.x/24/122856natblock
81.128.242.x/24/112856natblock
81.176.242.x/24/108342natblock
81.208.242.x/24/9UNROUTEDnatblock
81.16.242.x/24/834666natblock

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 unable to spoof routable, non-adjacent source addresses through even the first IP hop.
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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