Test run at: 2021-11-11 23:27:18 GMT
Client Prefix (v4): 199.87.154.x/24
Client AS (v4): 18451 (LESNET)
IPv4 Probes: 66
Outbound spoofing summary (from the client to our server) Source address type IPv4 Private - RFC1918 ✔ unknown Routable unknown Largest spoofable neighbor prefix length none
Meaning of result status in column:
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.
IPv4 Adjacent Netblock Testing:
Your host (199.87.154.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) Prefix
ASN of spoofed
Received 199.87.154.x/24 /31 18451 natblock 199.87.154.x/24 /30 18451 natblock 199.87.154.x/24 /29 18451 natblock 199.87.154.x/24 /28 18451 natblock 199.87.154.x/24 /27 18451 natblock 199.87.154.x/24 /26 18451 natblock 199.87.154.x/24 /25 18451 natblock 199.87.154.x/24 /24 18451 natblock 199.87.155.x/24 /23 18451 natblock 199.87.152.x/24 /22 18451 natblock 199.87.158.x/24 /21 394081 natblock 199.87.146.x/24 /20 UNROUTED natblock 199.87.138.x/24 /19 32281 natblock 199.87.186.x/24 /18 32524 natblock 199.87.218.x/24 /17 33459 natblock 199.87.26.x/24 /16 19445 natblock 199.86.154.x/24 /15 5006 natblock 199.85.154.x/24 /14 UNROUTED natblock 199.83.154.x/24 /13 22995 natblock 199.95.154.x/24 /12 3356 natblock 199.71.154.x/24 /11 577 natblock 199.119.154.x/24 /10 22646 natblock 199.23.154.x/24 /9 UNROUTED natblock 199.215.154.x/24 /8 UNROUTED natblock
Meaning of status in Received column:
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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