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Session Report

Summary:
Test run at: 2019-06-27 00:06:54 GMT
Client Prefix (v4): 38.77.16.x/24
Client AS (v4): 393422 (NEWVISIONS-CNY)
IPv4 Probes: 93
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length /20

Meaning of result status in column:

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 (38.77.16.x/24) can spoof 4095 neighboring addresses (within your /20 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
38.77.16.x/24/31393422yes
38.77.16.x/24/30393422yes
38.77.16.x/24/29393422yes
38.77.16.x/24/28393422yes
38.77.16.x/24/27393422yes
38.77.16.x/24/26393422yes
38.77.16.x/24/25393422yes
38.77.16.x/24/24393422yes
38.77.17.x/24/23393422yes
38.77.18.x/24/22393422yes
38.77.20.x/24/21393422yes
38.77.24.x/24/20393422yes
38.77.0.x/24/19174natblock
38.77.48.x/24/18174natblock
38.77.80.x/24/17174natblock
38.77.144.x/24/1663264natblock
38.76.16.x/24/1557624natblock
38.79.16.x/24/14174natblock
38.73.16.x/24/13174natblock
38.69.16.x/24/1240801natblock
38.93.16.x/24/11174natblock
38.109.16.x/24/10174natblock
38.13.16.x/24/9174natblock
38.205.16.x/24/8174natblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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 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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