Test run at: 2017-07-24 16:22:11 GMT
Client Prefix (v4): 208.81.5.x/24
Client AS (v4): 18451 (LESNET)
IPv4 Probes: 117
Outbound spoofing summary (from the client to our server) Source address type IPv4 Private - RFC1918 ✔ rewritten Routable ✔ blocked Largest spoofable neighbor prefix length /29
Spoof status key received Spoofed packet was received. ✔ Pattern of tests from this IP block indicates a switch from allowing spoofing to blocking it. rewritten Spoofed packet was received, but the source address was changed en route. blocked Spoofed packet was not received, but unspoofed packet was. unknown Neither spoofed nor unspoofed packet was received.
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 (208.81.5.x/24) can spoof 7 neighboring addresses (within your /29 prefix)
Spoofed source address (anon) Prefix
ASN of spoofed
Received 208.81.5.x/24 /31 18451 yes 208.81.5.x/24 /30 18451 yes 208.81.5.x/24 /29 18451 yes 208.81.5.x/24 /28 18451 natblock 208.81.5.x/24 /27 18451 natblock 208.81.5.x/24 /26 18451 natblock 208.81.5.x/24 /25 18451 natblock 208.81.5.x/24 /24 18451 natblock 208.81.4.x/24 /23 18451 natblock 208.81.7.x/24 /22 18451 natblock 208.81.1.x/24 /21 18451 natblock 208.81.13.x/24 /20 17382 natblock 208.81.21.x/24 /19 10340 natblock 208.81.37.x/24 /18 33010 natblock 208.81.69.x/24 /17 14600 natblock 208.81.133.x/24 /16 23052 natblock 208.80.5.x/24 /15 18779 natblock 208.83.5.x/24 /14 13703 natblock 208.85.5.x/24 /13 40244 natblock 208.89.5.x/24 /12 17359 natblock 208.65.5.x/24 /11 3356 natblock 208.113.5.x/24 /10 21570 natblock 208.17.5.x/24 /9 1239 natblock 208.209.5.x/24 /8 701 natblock
Meaning of status in Received column:
yes Packets spoofed from adjacent netblock were received (but that netblock is within the source AS) natblock Spoofed 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:
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