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Session Report

Summary:
Test run at: 2023-10-24 05:14:47 GMT
Client Prefix (v4): 208.77.20.x/24
Client AS (v4): 11878 (TZULO)
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 /21
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.
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 (208.77.20.x/24) can spoof 2047 neighboring addresses (within your /21 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
208.77.20.x/24/3111878yes
208.77.20.x/24/3011878yes
208.77.20.x/24/2911878yes
208.77.20.x/24/2811878yes
208.77.20.x/24/2711878yes
208.77.20.x/24/2611878yes
208.77.20.x/24/2511878yes
208.77.20.x/24/2411878yes
208.77.21.x/24/2311878yes
208.77.22.x/24/2211878yes
208.77.16.x/24/2111878yes
208.77.28.x/24/2018776no
208.77.4.x/24/1911374no
208.77.52.x/24/1833260no
208.77.84.x/24/1716438no
208.77.148.x/24/1640395no
208.76.20.x/24/15394786no
208.79.20.x/24/1410974no
208.73.20.x/24/1329713no
208.69.20.x/24/12UNROUTEDno
208.93.20.x/24/1119133no
208.109.20.x/24/10398101no
208.13.20.x/24/91239no
208.205.20.x/24/87385no

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)

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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