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Session Report

Summary:
Test run at: 2020-09-02 16:00:28 GMT
Client Prefix (v4): 193.37.252.x/24
Client AS (v4): 9009 (M247)
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable received
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 (193.37.252.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
193.37.252.x/24/319009rewritten
193.37.252.x/24/309009rewritten
193.37.252.x/24/299009rewritten
193.37.252.x/24/289009rewritten
193.37.252.x/24/279009rewritten
193.37.252.x/24/269009rewritten
193.37.252.x/24/259009rewritten
193.37.252.x/24/249009rewritten
193.37.253.x/24/239009rewritten
193.37.254.x/24/229009rewritten
193.37.248.x/24/21UNROUTEDrewritten
193.37.244.x/24/20786rewritten
193.37.236.x/24/19UNROUTEDrewritten
193.37.220.x/24/184686rewritten
193.37.188.x/24/17UNROUTEDrewritten
193.37.124.x/24/16UNROUTEDrewritten
193.36.252.x/24/153561rewritten
193.39.252.x/24/1461323rewritten
193.33.252.x/24/13UNROUTEDrewritten
193.45.252.x/24/123301rewritten
193.53.252.x/24/1144209rewritten
193.5.252.x/24/10UNROUTEDrewritten
193.101.252.x/24/9702rewritten
193.165.252.x/24/830764rewritten

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 10 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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