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Session Report

Summary:
Test run at: 2021-12-06 09:02:13 GMT
Client Prefix (v4): 109.197.103.x/24
Client AS (v4): 50661 (TELKABSPZOO-AS)
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 (109.197.103.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
109.197.103.x/24/3150661natblock
109.197.103.x/24/3050661natblock
109.197.103.x/24/2950661natblock
109.197.103.x/24/2850661natblock
109.197.103.x/24/2750661natblock
109.197.103.x/24/2650661natblock
109.197.103.x/24/2550661natblock
109.197.103.x/24/2450661natblock
109.197.102.x/24/2350661natblock
109.197.101.x/24/2250661natblock
109.197.99.x/24/2150661natblock
109.197.111.x/24/2050620natblock
109.197.119.x/24/1950760natblock
109.197.71.x/24/1829314natblock
109.197.39.x/24/1749761natblock
109.197.231.x/24/1648642natblock
109.196.103.x/24/15UNROUTEDnatblock
109.199.103.x/24/1432475natblock
109.193.103.x/24/133209natblock
109.205.103.x/24/1229422natblock
109.213.103.x/24/113215natblock
109.229.103.x/24/1049136natblock
109.133.103.x/24/95432natblock
109.69.103.x/24/841307natblock

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 able to spoof routable, non-adjacent source addresses through the first 10 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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