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Session Report

Summary:
Test run at: 2020-09-02 15:37:01 GMT
Client Prefix (v4): 195.181.170.x/24
Client AS (v4): 60068 (CDN77)
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 (195.181.170.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
195.181.170.x/24/3160068rewritten
195.181.170.x/24/3060068rewritten
195.181.170.x/24/2960068rewritten
195.181.170.x/24/2860068rewritten
195.181.170.x/24/2760068natblock
195.181.170.x/24/2660068rewritten
195.181.170.x/24/2560068rewritten
195.181.170.x/24/2460068rewritten
195.181.171.x/24/2360068rewritten
195.181.168.x/24/2260068rewritten
195.181.174.x/24/2160068rewritten
195.181.162.x/24/2060068rewritten
195.181.186.x/24/1944513rewritten
195.181.138.x/24/18203424rewritten
195.181.234.x/24/17206815rewritten
195.181.42.x/24/1658224rewritten
195.180.170.x/24/156659rewritten
195.183.170.x/24/142686rewritten
195.177.170.x/24/1312371rewritten
195.189.170.x/24/1240982rewritten
195.165.170.x/24/111759rewritten
195.149.170.x/24/103257rewritten
195.245.170.x/24/99186rewritten
195.53.170.x/24/83352rewritten

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 2 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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