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Session Report

Summary:
Test run at: 2023-04-23 20:37:45 GMT
Client Prefix (v4): 31.30.82.x/24
Client AS (v4): 16019 (VODAFONE-CZ-AS)
IPv4 Probes: 60
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length none
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 (31.30.82.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
31.30.82.x/24/3116019natblock
31.30.82.x/24/3016019natblock
31.30.82.x/24/2916019natblock
31.30.82.x/24/2816019natblock
31.30.82.x/24/2716019natblock
31.30.82.x/24/2616019natblock
31.30.82.x/24/2516019natblock
31.30.82.x/24/2416019natblock
31.30.83.x/24/2316019natblock
31.30.80.x/24/2216019natblock
31.30.86.x/24/2116019natblock
31.30.90.x/24/2016019natblock
31.30.66.x/24/1916019natblock
31.30.114.x/24/1816019natblock
31.30.18.x/24/1716019natblock
31.30.210.x/24/1616019natblock
31.31.82.x/24/1547292natblock
31.28.82.x/24/1425160natblock
31.26.82.x/24/1330722natblock
31.22.82.x/24/128455natblock
31.14.82.x/24/1158224natblock
31.62.82.x/24/105617natblock
31.94.82.x/24/92856natblock
31.158.82.x/24/830722natblock

Meaning of status in Received column:

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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