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Session Report

Summary:
Test run at: 2021-12-11 08:52:49 GMT
Client Prefix (v4): 24.72.5.x/24
Client AS (v4): 21804 (ACCESS-SK)
IPv4 Probes: 66
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 (24.72.5.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
24.72.5.x/24/3121804rewritten
24.72.5.x/24/3021804rewritten
24.72.5.x/24/2921804rewritten
24.72.5.x/24/2821804rewritten
24.72.5.x/24/2721804natblock
24.72.5.x/24/2621804rewritten
24.72.5.x/24/2521804rewritten
24.72.5.x/24/2421804rewritten
24.72.4.x/24/2321804rewritten
24.72.7.x/24/2221804rewritten
24.72.1.x/24/2121804rewritten
24.72.13.x/24/2021804rewritten
24.72.21.x/24/1921804rewritten
24.72.37.x/24/1821804rewritten
24.72.69.x/24/1721804rewritten
24.72.133.x/24/1621804rewritten
24.73.5.x/24/1533363rewritten
24.74.5.x/24/1411426rewritten
24.76.5.x/24/136327rewritten
24.64.5.x/24/126327rewritten
24.88.5.x/24/1111426rewritten
24.104.5.x/24/107922rewritten
24.8.5.x/24/97922rewritten
24.200.5.x/24/85769rewritten

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.

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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