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Session Report

Summary:
Test run at: 2018-05-17 17:17:18 GMT
Client Prefix (v4): 170.82.16.x/24
Client AS (v4): 266437
IPv4 Probes: 99
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable rewritten
Largest spoofable neighbor prefix length /23
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 (170.82.16.x/24) can spoof 511 neighboring addresses (within your /23 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
170.82.16.x/24/31266437natblock
170.82.16.x/24/30266437natblock
170.82.16.x/24/29266437yes
170.82.16.x/24/28266437yes
170.82.16.x/24/27266437yes
170.82.16.x/24/26266437yes
170.82.16.x/24/25266437yes
170.82.16.x/24/24266437yes
170.82.17.x/24/23266437yes
170.82.18.x/24/22UNROUTEDnatblock
170.82.20.x/24/21266440rewritten
170.82.24.x/24/20264750rewritten
170.82.0.x/24/19263829rewritten
170.82.48.x/24/18266438rewritten
170.82.80.x/24/1753065rewritten
170.82.144.x/24/16263717rewritten
170.83.16.x/24/15266466rewritten
170.80.16.x/24/1452468rewritten
170.86.16.x/24/137726rewritten
170.90.16.x/24/1264208rewritten
170.66.16.x/24/1111993rewritten
170.114.16.x/24/10UNROUTEDrewritten
170.18.16.x/24/916780rewritten
170.210.16.x/24/84270rewritten

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.
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 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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