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Session Report

Summary:
Test run at: 2024-07-27 18:18:06 GMT
Client Prefix (v4): 160.238.185.x/24
Client AS (v4): 265728
IPv4 Probes: 69
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable rewritten
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 (160.238.185.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
160.238.185.x/24/31265728rewritten
160.238.185.x/24/30265728sendto
160.238.185.x/24/29265728sendto
160.238.185.x/24/28265728natblock
160.238.185.x/24/27265728sendto
160.238.185.x/24/26265728rewritten
160.238.185.x/24/25265728sendto
160.238.185.x/24/24265728rewritten
160.238.184.x/24/23265728sendto
160.238.187.x/24/22265728rewritten
160.238.189.x/24/21266642rewritten
160.238.177.x/24/20265898rewritten
160.238.169.x/24/19265725sendto
160.238.153.x/24/18262881sendto
160.238.249.x/24/17266564sendto
160.238.57.x/24/1636974sendto
160.239.185.x/24/159366rewritten
160.236.185.x/24/14UNROUTEDsendto
160.234.185.x/24/13UNROUTEDsendto
160.230.185.x/24/121983sendto
160.254.185.x/24/11UNROUTEDsendto
160.206.185.x/24/10UNROUTEDsendto
160.174.185.x/24/96713sendto
160.110.185.x/24/8UNROUTEDrewritten

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.
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.
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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