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Session Report

Summary:
Test run at: 2024-02-09 18:30:10 GMT
Client Prefix (v4): 138.117.173.x/24
Client AS (v4): 264237
IPv4 Probes: 66
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable received
Largest spoofable neighbor prefix length /22
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 (138.117.173.x/24) can spoof 1023 neighboring addresses (within your /22 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
138.117.173.x/24/31264237yes
138.117.173.x/24/30264237yes
138.117.173.x/24/29264237yes
138.117.173.x/24/28264237yes
138.117.173.x/24/27264237yes
138.117.173.x/24/26264237yes
138.117.173.x/24/25264237yes
138.117.173.x/24/24264237yes
138.117.172.x/24/23264237yes
138.117.175.x/24/22264255yes
138.117.169.x/24/21UNROUTEDnatblock
138.117.165.x/24/20264517natblock
138.117.189.x/24/19264238natblock
138.117.141.x/24/1852468natblock
138.117.237.x/24/17270661natblock
138.117.45.x/24/16270900natblock
138.116.173.x/24/1533004natblock
138.119.173.x/24/14611natblock
138.113.173.x/24/13UNROUTEDnatblock
138.125.173.x/24/12UNROUTEDnatblock
138.101.173.x/24/119593natblock
138.85.173.x/24/108147natblock
138.53.173.x/24/9UNROUTEDnatblock
138.245.173.x/24/812816natblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received
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.

IPv4 Outbound Filtering Depth:

The tracefilter test found your host unable to spoof routable, non-adjacent source addresses through even the first IP hop.
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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