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Session Report

Summary:
Test run at: 2020-01-24 11:27:24 GMT
Client Prefix (v4): 212.123.251.x/24
Client AS (v4): 8220 (COLT)
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable received
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.

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 (212.123.251.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
212.123.251.x/24/318220rewritten
212.123.251.x/24/308220rewritten
212.123.251.x/24/298220rewritten
212.123.251.x/24/288220rewritten
212.123.251.x/24/278220rewritten
212.123.251.x/24/268220rewritten
212.123.251.x/24/258220rewritten
212.123.251.x/24/248220rewritten
212.123.250.x/24/238220rewritten
212.123.249.x/24/228220rewritten
212.123.255.x/24/218220rewritten
212.123.243.x/24/208220rewritten
212.123.235.x/24/198220rewritten
212.123.219.x/24/188220rewritten
212.123.187.x/24/171136rewritten
212.123.123.x/24/1615598rewritten
212.122.251.x/24/1520484rewritten
212.121.251.x/24/1416030rewritten
212.127.251.x/24/1333915rewritten
212.115.251.x/24/1215377rewritten
212.107.251.x/24/1151456rewritten
212.91.251.x/24/1015366rewritten
212.59.251.x/24/9196730rewritten
212.251.251.x/24/82119rewritten

Meaning of status in Received column:

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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