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Session Report

Summary:
Test run at: 2017-02-14 15:58:20 GMT
Client Prefix (v4): 217.65.221.x/24
Client AS (v4): 29190 (OVERTA-AS)
IPv4 Probes: 90
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 (217.65.221.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
217.65.221.x/24/3129190rewritten
217.65.221.x/24/3029190rewritten
217.65.221.x/24/2929190rewritten
217.65.221.x/24/2829190rewritten
217.65.221.x/24/2729190rewritten
217.65.221.x/24/2629190rewritten
217.65.221.x/24/2529190rewritten
217.65.221.x/24/2429190rewritten
217.65.220.x/24/2329190rewritten
217.65.223.x/24/2229190rewritten
217.65.217.x/24/2129190rewritten
217.65.213.x/24/2029190rewritten
217.65.205.x/24/1915958rewritten
217.65.253.x/24/1859671rewritten
217.65.157.x/24/1729212rewritten
217.65.93.x/24/1612389rewritten
217.64.221.x/24/15UNROUTEDrewritten
217.67.221.x/24/1415997rewritten
217.69.221.x/24/138359rewritten
217.73.221.x/24/128612rewritten
217.81.221.x/24/113320rewritten
217.97.221.x/24/105617rewritten
217.1.221.x/24/93320rewritten
217.193.221.x/24/83303rewritten

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 unable to spoof routable, non-adjacent source addresses through even the first IP hop.
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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