Test run at: 2021-07-14 14:27:07 GMT
Client Prefix (v4): 45.175.0.x/24
Client AS (v4): 268871
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 (45.175.0.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)
Spoofed source address (anon) Prefix
ASN of spoofed
Received 45.175.0.x/24 /31 268871 yes 45.175.0.x/24 /30 268871 yes 45.175.0.x/24 /29 268871 yes 45.175.0.x/24 /28 268871 natblock 45.175.0.x/24 /27 268871 yes 45.175.0.x/24 /26 268871 yes 45.175.0.x/24 /25 268871 yes 45.175.0.x/24 /24 268871 yes 45.175.1.x/24 /23 268871 yes 45.175.2.x/24 /22 268871 yes 45.175.4.x/24 /21 268872 yes 45.175.8.x/24 /20 269067 yes 45.175.16.x/24 /19 268875 yes 45.175.32.x/24 /18 268881 yes 45.175.64.x/24 /17 263686 yes 45.175.128.x/24 /16 268897 yes 45.174.0.x/24 /15 268841 yes 45.173.0.x/24 /14 61451 yes 45.171.0.x/24 /13 268180 yes 45.167.0.x/24 /12 52468 yes 45.191.0.x/24 /11 64114 yes 45.143.0.x/24 /10 UNROUTED natblock 45.239.0.x/24 /9 UNROUTED natblock 45.47.0.x/24 /8 11351 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 4 IP hop(s).Summary:
The results from all tests are aggregated to produce a summary "State of IP Spoofing" report.Feedback:
We welcome questions and feedback to the Spoofer Information Mailing List and invite users to join the Spoofer Users Mailing List for discussion and announcements.