Test run at: 2021-03-18 14:42:11 GMT
Client Prefix (v4): 131.0.60.x/24
Client AS (v4): 61704
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 /8
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.
IPv4 Adjacent Netblock Testing:
Your host (131.0.60.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)
Spoofed source address (anon) Prefix
ASN of spoofed
Received 131.0.60.x/24 /31 61704 natblock 131.0.60.x/24 /30 61704 natblock 131.0.60.x/24 /29 61704 yes 131.0.60.x/24 /28 61704 yes 131.0.60.x/24 /27 61704 yes 131.0.60.x/24 /26 61704 yes 131.0.60.x/24 /25 61704 yes 131.0.60.x/24 /24 61704 yes 131.0.61.x/24 /23 61704 yes 131.0.62.x/24 /22 61704 yes 131.0.56.x/24 /21 61874 yes 131.0.52.x/24 /20 3549 yes 131.0.44.x/24 /19 262621 yes 131.0.28.x/24 /18 28210 yes 131.0.124.x/24 /17 UNROUTED yes 131.0.188.x/24 /16 61708 yes 131.1.60.x/24 /15 3269 yes 131.2.60.x/24 /14 UNROUTED yes 131.4.60.x/24 /13 721 yes 131.8.60.x/24 /12 UNROUTED yes 131.16.60.x/24 /11 721 yes 131.32.60.x/24 /10 385 yes 131.64.60.x/24 /9 27064 yes 131.128.60.x/24 /8 14348 yes
Meaning of status in Received column:
yes Packets spoofed from adjacent netblock were received 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 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:
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