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Session Report

Summary:
Test run at: 2021-03-28 02:33:12 GMT
Client Prefix (v4): 170.238.44.x/24
Client AS (v4): 266317
IPv4 Probes: 66
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable rewritten
Largest spoofable neighbor prefix length /28

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.

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 (170.238.44.x/24) can spoof 15 neighboring addresses (within your /28 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
170.238.44.x/24/31266317no
170.238.44.x/24/30266317no
170.238.44.x/24/29266317yes
170.238.44.x/24/28266317yes
170.238.44.x/24/27266317rewritten
170.238.44.x/24/26266317rewritten
170.238.44.x/24/25266317rewritten
170.238.44.x/24/24266317rewritten
170.238.45.x/24/23266317rewritten
170.238.46.x/24/22266317rewritten
170.238.40.x/24/21264795rewritten
170.238.36.x/24/20266324rewritten
170.238.60.x/24/1961649rewritten
170.238.12.x/24/18266316rewritten
170.238.108.x/24/17264812rewritten
170.238.172.x/24/16262485rewritten
170.239.44.x/24/15266339rewritten
170.236.44.x/24/14UNROUTEDrewritten
170.234.44.x/24/13UNROUTEDrewritten
170.230.44.x/24/12UNROUTEDrewritten
170.254.44.x/24/11265153rewritten
170.206.44.x/24/10UNROUTEDrewritten
170.174.44.x/24/9UNROUTEDrewritten
170.110.44.x/24/833343rewritten

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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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