Test run at: 2021-10-28 11:04:50 GMT
Client Prefix (v4): 187.109.17.x/24
Client AS (v4): 53112
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
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 (187.109.17.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)
Spoofed source address (anon) Prefix
ASN of spoofed
Received 187.109.17.x/24 /31 53112 natblock 187.109.17.x/24 /30 53112 natblock 187.109.17.x/24 /29 53112 yes 187.109.17.x/24 /28 53112 yes 187.109.17.x/24 /27 53112 yes 187.109.17.x/24 /26 53112 yes 187.109.17.x/24 /25 53112 yes 187.109.17.x/24 /24 53112 yes 187.109.16.x/24 /23 53112 yes 187.109.19.x/24 /22 53112 yes 187.109.21.x/24 /21 53112 yes 187.109.25.x/24 /20 53112 yes 187.109.1.x/24 /19 28198 yes 187.109.49.x/24 /18 53113 yes 187.109.81.x/24 /17 53139 yes 187.109.145.x/24 /16 28668 yes 187.108.17.x/24 /15 53169 yes 187.111.17.x/24 /14 53120 yes 187.105.17.x/24 /13 28573 yes 187.101.17.x/24 /12 27699 yes 187.125.17.x/24 /11 7738 yes 187.77.17.x/24 /10 7738 yes 187.45.17.x/24 /9 28580 yes 187.237.17.x/24 /8 8151 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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