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Session Report

Summary:
Test run at: 2021-07-26 12:10:35 GMT
Client Prefix (v4): 177.221.67.x/24
Client AS (v4): 52651
IPv4 Probes: 66
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable received
Largest spoofable neighbor prefix length /26

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 (177.221.67.x/24) can spoof 63 neighboring addresses (within your /26 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
177.221.67.x/24/3152651natblock
177.221.67.x/24/3052651natblock
177.221.67.x/24/2952651rewritten
177.221.67.x/24/2852651rewritten
177.221.67.x/24/2752651rewritten
177.221.67.x/24/2652651yes
177.221.67.x/24/2552651rewritten
177.221.67.x/24/2452651rewritten
177.221.66.x/24/2352651rewritten
177.221.65.x/24/2252651rewritten
177.221.71.x/24/2152651rewritten
177.221.75.x/24/20262336rewritten
177.221.83.x/24/1952653rewritten
177.221.99.x/24/1852654rewritten
177.221.3.x/24/1728294rewritten
177.221.195.x/24/1652682rewritten
177.220.67.x/24/1553187rewritten
177.223.67.x/24/1452722rewritten
177.217.67.x/24/1326615rewritten
177.213.67.x/24/1226599rewritten
177.205.67.x/24/1118881rewritten
177.253.67.x/24/1027831rewritten
177.157.67.x/24/918881rewritten
177.93.67.x/24/8263137rewritten

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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