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Session Report

Summary:
Test run at: 2017-05-15 15:48:44 GMT
Client Prefix (v4): 37.143.19.x/24
Client AS (v4): 24739 (SEVEREN-TELECOM)
IPv4 Probes: 131
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable rewritten
Largest spoofable neighbor prefix length none

Meaning of result status in column:

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 (37.143.19.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
37.143.19.x/24/3124739natblock
37.143.19.x/24/3024739natblock
37.143.19.x/24/2924739rewritten
37.143.19.x/24/2824739rewritten
37.143.19.x/24/2724739rewritten
37.143.19.x/24/2624739rewritten
37.143.19.x/24/2524739rewritten
37.143.19.x/24/2424739rewritten
37.143.18.x/24/2324739rewritten
37.143.17.x/24/2224739rewritten
37.143.23.x/24/2124739rewritten
37.143.27.x/24/2024739rewritten
37.143.3.x/24/1947537rewritten
37.143.51.x/24/18UNROUTEDrewritten
37.143.83.x/24/1750266rewritten
37.143.147.x/24/1658256rewritten
37.142.19.x/24/1512849rewritten
37.141.19.x/24/1435819rewritten
37.139.19.x/24/1314061rewritten
37.135.19.x/24/1212715rewritten
37.159.19.x/24/1130722rewritten
37.175.19.x/24/1051207rewritten
37.207.19.x/24/93269rewritten
37.15.19.x/24/812715rewritten

Meaning of status in Received column:

natblockSpoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.
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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