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Session Report

Summary:
Test run at: 2016-11-12 17:29:39 GMT
Client Prefix (v4): 81.27.4.x/24
Client AS (v4): 13189 (LIDERO)
IPv4 Probes: 104
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 Adjacent Netblock Testing:

Your host (81.27.4.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
81.27.4.x/24/3113189rewritten
81.27.4.x/24/3013189rewritten
81.27.4.x/24/2913189rewritten
81.27.4.x/24/2813189rewritten
81.27.4.x/24/2713189rewritten
81.27.4.x/24/2613189rewritten
81.27.4.x/24/2513189rewritten
81.27.4.x/24/2413189rewritten
81.27.5.x/24/2313189rewritten
81.27.6.x/24/2213189rewritten
81.27.0.x/24/2113189rewritten
81.27.12.x/24/2013189rewritten
81.27.20.x/24/1939509rewritten
81.27.36.x/24/188542rewritten
81.27.68.x/24/1725577rewritten
81.27.132.x/24/1624880rewritten
81.26.4.x/24/1524848rewritten
81.25.4.x/24/1424789rewritten
81.31.4.x/24/138928rewritten
81.19.4.x/24/1224641rewritten
81.11.4.x/24/11UNROUTEDrewritten
81.59.4.x/24/1013127rewritten
81.91.4.x/24/93301rewritten
81.155.4.x/24/82856rewritten

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 15 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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