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Session Report

Summary:
Test run at: 2021-06-18 19:52:56 GMT
Client Prefix (v4): 91.192.4.x/24
Client AS (v4): 203735 (Capacities-LTD)
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 (91.192.4.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
91.192.4.x/24/31203735rewritten
91.192.4.x/24/30203735rewritten
91.192.4.x/24/29203735rewritten
91.192.4.x/24/28203735rewritten
91.192.4.x/24/27203735rewritten
91.192.4.x/24/26203735rewritten
91.192.4.x/24/25203735rewritten
91.192.4.x/24/24203735rewritten
91.192.5.x/24/23203735rewritten
91.192.6.x/24/22203735rewritten
91.192.0.x/24/2142261rewritten
91.192.12.x/24/2042274rewritten
91.192.20.x/24/1942291rewritten
91.192.36.x/24/1839704rewritten
91.192.68.x/24/1742377rewritten
91.192.132.x/24/1634579rewritten
91.193.4.x/24/159009rewritten
91.194.4.x/24/1442976rewritten
91.196.4.x/24/1342955rewritten
91.200.4.x/24/1243748rewritten
91.208.4.x/24/1129684rewritten
91.224.4.x/24/1052170rewritten
91.128.4.x/24/91257rewritten
91.64.4.x/24/83209rewritten

Meaning of status in Received column:

rewrittenThe source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.

IPv4 Outbound Filtering Depth:

The tracefilter test found your host unable to spoof routable, non-adjacent source addresses through even the first IP hop.
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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