Test run at: 2020-01-27 17:35:23 GMT
Client Prefix (v4): 168.195.28.x/24
Client AS (v4): 265425
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server) Source address type IPv4 Private - RFC1918 blocked Routable ✔ received Largest spoofable neighbor prefix length /9
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 (168.195.28.x/24) can spoof 8388607 neighboring addresses (within your /9 prefix)
Spoofed source address (anon) Prefix
ASN of spoofed
Received 168.195.28.x/24 /31 265425 yes 168.195.28.x/24 /30 265425 natblock 168.195.28.x/24 /29 265425 yes 168.195.28.x/24 /28 265425 yes 168.195.28.x/24 /27 265425 yes 168.195.28.x/24 /26 265425 yes 168.195.28.x/24 /25 265425 yes 168.195.28.x/24 /24 265425 yes 168.195.29.x/24 /23 265425 yes 168.195.30.x/24 /22 265425 yes 168.195.24.x/24 /21 265424 yes 168.195.20.x/24 /20 265419 yes 168.195.12.x/24 /19 53186 yes 168.195.60.x/24 /18 UNROUTED natblock 168.195.92.x/24 /17 265443 yes 168.195.156.x/24 /16 UNROUTED natblock 168.194.28.x/24 /15 265375 yes 168.193.28.x/24 /14 UNROUTED natblock 168.199.28.x/24 /13 UNROUTED natblock 168.203.28.x/24 /12 7317 yes 168.211.28.x/24 /11 136525 yes 168.227.28.x/24 /10 262880 yes 168.131.28.x/24 /9 10197 yes 168.67.28.x/24 /8 UNROUTED natblock
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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