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Session Report

Summary:
Test run at: 2021-10-02 08:58:50 GMT
Client Prefix (v4): 141.193.143.x/24
Client AS (v4): 398866 (INTERBANK-01)
IPv4 Probes: 66
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable blocked
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 (141.193.143.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
141.193.143.x/24/31398866natblock
141.193.143.x/24/30398866natblock
141.193.143.x/24/29398866natblock
141.193.143.x/24/28398866natblock
141.193.143.x/24/27398866natblock
141.193.143.x/24/26398866natblock
141.193.143.x/24/25398866natblock
141.193.143.x/24/24398866natblock
141.193.142.x/24/23396219natblock
141.193.141.x/24/22398641natblock
141.193.139.x/24/21399019natblock
141.193.135.x/24/2053646natblock
141.193.159.x/24/1945753natblock
141.193.175.x/24/1816717natblock
141.193.207.x/24/1711191natblock
141.193.15.x/24/167029natblock
141.192.143.x/24/151342natblock
141.195.143.x/24/14208687natblock
141.197.143.x/24/13UNROUTEDnatblock
141.201.143.x/24/121109natblock
141.209.143.x/24/1127274natblock
141.225.143.x/24/1014048natblock
141.129.143.x/24/916988natblock
141.65.143.x/24/8680natblock

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 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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