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Session Report

Summary:
Test run at: 2017-04-14 09:51:58 GMT
Client Prefix (v4): 188.37.23.x/24
Client AS (v4): 12353 (VODAFONE-PT)
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 (188.37.23.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
188.37.23.x/24/3112353rewritten
188.37.23.x/24/3012353rewritten
188.37.23.x/24/2912353rewritten
188.37.23.x/24/2812353rewritten
188.37.23.x/24/2712353rewritten
188.37.23.x/24/2612353rewritten
188.37.23.x/24/2512353rewritten
188.37.23.x/24/2412353rewritten
188.37.22.x/24/2312353rewritten
188.37.21.x/24/2212353rewritten
188.37.19.x/24/2112353rewritten
188.37.31.x/24/2012353rewritten
188.37.7.x/24/1912353rewritten
188.37.55.x/24/1812353rewritten
188.37.87.x/24/1712353rewritten
188.37.151.x/24/1612353rewritten
188.36.23.x/24/155483rewritten
188.39.23.x/24/148468rewritten
188.33.23.x/24/13201019rewritten
188.45.23.x/24/128447rewritten
188.53.23.x/24/1125019rewritten
188.5.23.x/24/105432rewritten
188.101.23.x/24/93209rewritten
188.165.23.x/24/816276rewritten

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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