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Session Report

Summary:
Test run at: 2019-04-04 18:01:56 GMT
Client Prefix (v4): 170.247.20.x/24
Client AS (v4): 263324
IPv4 Probes: 116
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable received
Largest spoofable neighbor prefix length /9
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 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 (170.247.20.x/24) can spoof 8388607 neighboring addresses (within your /9 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
170.247.20.x/24/31263324natblock
170.247.20.x/24/30263324natblock
170.247.20.x/24/29263324yes
170.247.20.x/24/28263324yes
170.247.20.x/24/27263324yes
170.247.20.x/24/26263324yes
170.247.20.x/24/25263324yes
170.247.20.x/24/24263324yes
170.247.21.x/24/23263324yes
170.247.22.x/24/22263324yes
170.247.16.x/24/2161732yes
170.247.28.x/24/20265347yes
170.247.4.x/24/1961900yes
170.247.52.x/24/18262509yes
170.247.84.x/24/17262262yes
170.247.148.x/24/16263166yes
170.246.20.x/24/15265713yes
170.245.20.x/24/1452736yes
170.243.20.x/24/13UNROUTEDnatblock
170.255.20.x/24/125400yes
170.231.20.x/24/1153152yes
170.215.20.x/24/107011yes
170.183.20.x/24/98030yes
170.119.20.x/24/8UNROUTEDnatblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received
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 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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