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Session Report

Summary:
Test run at: 2022-01-31 01:13:29 GMT
Client Prefix (v4): 154.3.251.x/24
Client AS (v4): 174 (COGENT-174)
IPv4 Probes: 63
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 unknown
Routable unknown
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.

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 (154.3.251.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
154.3.251.x/24/31174sendto
154.3.251.x/24/30174sendto
154.3.251.x/24/29174natblock
154.3.251.x/24/28174sendto
154.3.251.x/24/27174sendto
154.3.251.x/24/26174sendto
154.3.251.x/24/25174sendto
154.3.251.x/24/24174sendto
154.3.250.x/24/23174sendto
154.3.249.x/24/22174sendto
154.3.255.x/24/21174sendto
154.3.243.x/24/207029sendto
154.3.235.x/24/19174sendto
154.3.219.x/24/18174sendto
154.3.187.x/24/17174sendto
154.3.123.x/24/1654133sendto
154.2.251.x/24/15UNROUTEDsendto
154.1.251.x/24/14UNROUTEDsendto
154.7.251.x/24/13174sendto
154.11.251.x/24/12852sendto
154.19.251.x/24/11395886sendto
154.35.251.x/24/1014987sendto
154.67.251.x/24/921351sendto
154.131.251.x/24/837069sendto

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.
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.
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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