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Session Report

Summary:
Test run at: 2017-08-07 16:59:48 GMT
Client Prefix (v4): 37.221.176.x/24
Client AS (v4): 198961 (Orion-Telekom-Montenegro)
IPv4 Probes: 120
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 (37.221.176.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
37.221.176.x/24/31198961rewritten
37.221.176.x/24/30198961rewritten
37.221.176.x/24/29198961rewritten
37.221.176.x/24/28198961rewritten
37.221.176.x/24/27198961rewritten
37.221.176.x/24/26198961rewritten
37.221.176.x/24/25198961rewritten
37.221.176.x/24/24198961rewritten
37.221.177.x/24/23198961rewritten
37.221.178.x/24/22UNROUTEDrewritten
37.221.180.x/24/2160861rewritten
37.221.184.x/24/2058084rewritten
37.221.160.x/24/193223rewritten
37.221.144.x/24/1843266rewritten
37.221.240.x/24/17198668rewritten
37.221.48.x/24/1651074rewritten
37.220.176.x/24/158324rewritten
37.223.176.x/24/1412430rewritten
37.217.176.x/24/1335819rewritten
37.213.176.x/24/126697rewritten
37.205.176.x/24/113269rewritten
37.253.176.x/24/102119rewritten
37.157.176.x/24/943561rewritten
37.93.176.x/24/83320rewritten

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 able to spoof routable, non-adjacent source addresses through the first 7 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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