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Session Report

Summary:
Test run at: 2022-04-09 04:21:28 GMT
Client Prefix (v4): 207.23.255.x/24
Client AS (v4): 271 (BCNET-AS)
IPv4 Probes: 60
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length /24
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 (207.23.255.x/24) can spoof 255 neighboring addresses (within your /24 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
207.23.255.x/24/31271natblock
207.23.255.x/24/30271natblock
207.23.255.x/24/29271natblock
207.23.255.x/24/28271natblock
207.23.255.x/24/27271natblock
207.23.255.x/24/26271natblock
207.23.255.x/24/25271yes
207.23.255.x/24/24271yes
207.23.254.x/24/23271natblock
207.23.253.x/24/22271natblock
207.23.251.x/24/21271natblock
207.23.247.x/24/20271natblock
207.23.239.x/24/19271natblock
207.23.223.x/24/1811105natblock
207.23.191.x/24/1711105natblock
207.23.127.x/24/16271natblock
207.22.255.x/24/15UNROUTEDnatblock
207.21.255.x/24/1413768natblock
207.19.255.x/24/136648natblock
207.31.255.x/24/122914natblock
207.7.255.x/24/113356natblock
207.55.255.x/24/109115natblock
207.87.255.x/24/92828natblock
207.151.255.x/24/8226natblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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).
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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