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Session Report

Summary:
Test run at: 2017-09-12 17:21:53 GMT
Client Prefix (v4): 77.56.181.x/24
Client AS (v4): 6830 (LibertyGlobal)
IPv4 Probes: 131
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
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.
IPv4 AS Route:
This test run probed the following paths in order to infer your ability to send different spoofed source packets. Each node in the graph corresponds to an autonomous system, i.e. different Internet service providers. NOTE: This graph does NOT show if an AS blocks spoofed packets, only the path taken by received spoofed packets. The IP Path Details are available for this run. If non-spoofed packets weren't received at a destination, the traceroute to that destination is not included in this graph and may even cause a totally empty graph.

  

  

IPv4 Adjacent Netblock Testing:

Your host (77.56.181.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
77.56.181.x/24/316830natblock
77.56.181.x/24/306830natblock
77.56.181.x/24/296830natblock
77.56.181.x/24/286830natblock
77.56.181.x/24/276830natblock
77.56.181.x/24/266830natblock
77.56.181.x/24/256830natblock
77.56.181.x/24/246830natblock
77.56.180.x/24/236830natblock
77.56.183.x/24/226830natblock
77.56.177.x/24/216830natblock
77.56.189.x/24/206830natblock
77.56.165.x/24/196830natblock
77.56.149.x/24/186830natblock
77.56.245.x/24/176830natblock
77.56.53.x/24/166830natblock
77.57.181.x/24/156830natblock
77.58.181.x/24/146830natblock
77.60.181.x/24/131136natblock
77.48.181.x/24/126830natblock
77.40.181.x/24/115381natblock
77.24.181.x/24/103209natblock
77.120.181.x/24/925229natblock
77.184.181.x/24/86805natblock

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.

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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