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Session Report

Summary:
Test run at: 2023-04-19 12:31:02 GMT
Client Prefix (v4): 187.1.0.x/24
Client AS (v4): 263880
IPv4 Probes: 60
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 received
Routable received
Largest spoofable neighbor prefix length /8
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 (187.1.0.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
187.1.0.x/24/31263880yes
187.1.0.x/24/30263880yes
187.1.0.x/24/29263880yes
187.1.0.x/24/28263880yes
187.1.0.x/24/27263880yes
187.1.0.x/24/26263880natblock
187.1.0.x/24/25263880natblock
187.1.0.x/24/24263880natblock
187.1.1.x/24/23263880yes
187.1.2.x/24/22263880yes
187.1.4.x/24/21263880yes
187.1.8.x/24/20263880yes
187.1.16.x/24/19262272yes
187.1.32.x/24/1828246yes
187.1.64.x/24/17262659yes
187.1.128.x/24/1628299yes
187.0.0.x/24/1528283yes
187.3.0.x/24/1428573yes
187.5.0.x/24/138167yes
187.9.0.x/24/1210429yes
187.17.0.x/24/1128261yes
187.33.0.x/24/1026592yes
187.65.0.x/24/928573yes
187.129.0.x/24/8UNROUTEDyes

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 9 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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