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Session Report

Summary:
Test run at: 2021-02-26 14:03:01 GMT
Client Prefix (v4): 119.28.53.x/24
Client AS (v4): 132203 (TENCENT-NET-AP-CN)
IPv4 Probes: 69
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable received
Largest spoofable neighbor prefix length /15
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 (119.28.53.x/24) can spoof 131071 neighboring addresses (within your /15 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
119.28.53.x/24/31132203natblock
119.28.53.x/24/30132203natblock
119.28.53.x/24/29132203natblock
119.28.53.x/24/28132203natblock
119.28.53.x/24/27132203natblock
119.28.53.x/24/26132203natblock
119.28.53.x/24/25132203natblock
119.28.53.x/24/24132203natblock
119.28.52.x/24/23132203natblock
119.28.55.x/24/22132203natblock
119.28.49.x/24/21132203natblock
119.28.61.x/24/20132203natblock
119.28.37.x/24/19132203natblock
119.28.21.x/24/18132203natblock
119.28.117.x/24/17132203natblock
119.28.181.x/24/16132203natblock
119.29.53.x/24/1545090yes
119.30.53.x/24/14UNROUTEDnatblock
119.24.53.x/24/139617natblock
119.20.53.x/24/124134natblock
119.12.53.x/24/119723natblock
119.60.53.x/24/104134natblock
119.92.53.x/24/99299natblock
119.156.53.x/24/817557natblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received
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 3 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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