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Session Report

Summary:
Test run at: 2021-03-21 22:56:58 GMT
Client Prefix (v4): 191.37.157.x/24
Client AS (v4): 263362
IPv4 Probes: 66
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable received
Largest spoofable neighbor prefix length /8

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.

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 (191.37.157.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
191.37.157.x/24/31263362natblock
191.37.157.x/24/30263362natblock
191.37.157.x/24/29263362yes
191.37.157.x/24/28263362yes
191.37.157.x/24/27263362yes
191.37.157.x/24/26263362yes
191.37.157.x/24/25263362yes
191.37.157.x/24/24263362yes
191.37.156.x/24/23263362yes
191.37.159.x/24/22263362yes
191.37.153.x/24/21263362yes
191.37.149.x/24/20263361yes
191.37.141.x/24/19266387yes
191.37.189.x/24/1861904yes
191.37.221.x/24/17263373yes
191.37.29.x/24/16263352yes
191.36.157.x/24/15263333yes
191.39.157.x/24/1453037yes
191.33.157.x/24/1310429yes
191.45.157.x/24/127738yes
191.53.157.x/24/1128202yes
191.5.157.x/24/1053085yes
191.101.157.x/24/961317yes
191.165.157.x/24/826615yes

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received
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 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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