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Session Report

Summary:
Test run at: 2019-04-30 23:48:51 GMT
Client Prefix (v4): 187.17.174.x/24
Client AS (v4): 28263
IPv4 Probes: 93
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 (187.17.174.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
187.17.174.x/24/3128263rewritten
187.17.174.x/24/3028263rewritten
187.17.174.x/24/2928263rewritten
187.17.174.x/24/2828263rewritten
187.17.174.x/24/2728263rewritten
187.17.174.x/24/2628263rewritten
187.17.174.x/24/2528263rewritten
187.17.174.x/24/2428263rewritten
187.17.175.x/24/2328263rewritten
187.17.172.x/24/2228263rewritten
187.17.170.x/24/2128263rewritten
187.17.166.x/24/2028263rewritten
187.17.190.x/24/1928264rewritten
187.17.142.x/24/18UNROUTEDrewritten
187.17.238.x/24/1728267rewritten
187.17.46.x/24/1628262rewritten
187.16.174.x/24/1528256rewritten
187.19.174.x/24/1428126rewritten
187.21.174.x/24/1328573rewritten
187.25.174.x/24/1222085rewritten
187.1.174.x/24/1128252rewritten
187.49.174.x/24/10UNROUTEDrewritten
187.81.174.x/24/926615rewritten
187.145.174.x/24/88151rewritten

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 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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