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Session Report

Summary:
Test run at: 2021-08-31 04:24:32 GMT
Client Prefix (v4): 193.239.72.x/24
Client AS (v4): 35297 (DATALINE-AS)
IPv4 Probes: 66
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length /22

Meaning of result status in column:

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 (193.239.72.x/24) can spoof 1023 neighboring addresses (within your /22 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
193.239.72.x/24/3135297yes
193.239.72.x/24/3035297yes
193.239.72.x/24/2935297natblock
193.239.72.x/24/2835297yes
193.239.72.x/24/2735297yes
193.239.72.x/24/2635297yes
193.239.72.x/24/2535297yes
193.239.72.x/24/2435297yes
193.239.73.x/24/2335297yes
193.239.74.x/24/2235297yes
193.239.76.x/24/21201080natblock
193.239.64.x/24/208614natblock
193.239.88.x/24/1925542natblock
193.239.104.x/24/1825394natblock
193.239.8.x/24/17UNROUTEDnatblock
193.239.200.x/24/163303natblock
193.238.72.x/24/15196767natblock
193.237.72.x/24/145378natblock
193.235.72.x/24/13UNROUTEDnatblock
193.231.72.x/24/1234808natblock
193.255.72.x/24/118517natblock
193.207.72.x/24/108612natblock
193.175.72.x/24/9680natblock
193.111.72.x/24/821473natblock

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 3 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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