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Session Report

Summary:
Test run at: 2021-10-10 00:02:11 GMT
Client Prefix (v4): 138.99.53.x/24
Client AS (v4): 28577
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 /10
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 (138.99.53.x/24) can spoof 4194303 neighboring addresses (within your /10 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
138.99.53.x/24/3128577yes
138.99.53.x/24/3028577yes
138.99.53.x/24/2928577yes
138.99.53.x/24/2828577yes
138.99.53.x/24/2728577yes
138.99.53.x/24/2628577yes
138.99.53.x/24/2528577yes
138.99.53.x/24/2428577yes
138.99.52.x/24/2328577yes
138.99.55.x/24/2228577yes
138.99.49.x/24/21262427yes
138.99.61.x/24/20264170yes
138.99.37.x/24/19263740yes
138.99.21.x/24/18262883yes
138.99.117.x/24/1753233yes
138.99.181.x/24/16262199yes
138.98.53.x/24/15UNROUTEDnatblock
138.97.53.x/24/14264128yes
138.103.53.x/24/13703yes
138.107.53.x/24/122497yes
138.115.53.x/24/11270yes
138.67.53.x/24/1036704yes
138.35.53.x/24/9UNROUTEDnatblock
138.227.53.x/24/8UNROUTEDnatblock

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 able to spoof routable, non-adjacent source addresses through the first 9 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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