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Session Report

Summary:
Test run at: 2020-09-02 17:17:39 GMT
Client Prefix (v4): 178.17.172.x/24
Client AS (v4): 43289 (TRABIA)
IPv4 Probes: 75
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 (178.17.172.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
178.17.172.x/24/3143289natblock
178.17.172.x/24/3043289natblock
178.17.172.x/24/2943289natblock
178.17.172.x/24/2843289natblock
178.17.172.x/24/2743289rewritten
178.17.172.x/24/2643289rewritten
178.17.172.x/24/2543289rewritten
178.17.172.x/24/2443289rewritten
178.17.173.x/24/2343289rewritten
178.17.174.x/24/2243289rewritten
178.17.168.x/24/2143289rewritten
178.17.164.x/24/2043289rewritten
178.17.188.x/24/19UNROUTEDrewritten
178.17.140.x/24/1842514rewritten
178.17.236.x/24/1762023rewritten
178.17.44.x/24/1631463rewritten
178.16.172.x/24/1534177rewritten
178.19.172.x/24/14202761rewritten
178.21.172.x/24/13199081rewritten
178.25.172.x/24/123209rewritten
178.1.172.x/24/113209rewritten
178.49.172.x/24/1031200rewritten
178.81.172.x/24/934400rewritten
178.145.172.x/24/85432rewritten

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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