Test run at: 2021-03-28 02:33:12 GMT
Client Prefix (v4): 170.238.44.x/24
Client AS (v4): 266317
IPv4 Probes: 66
Outbound spoofing summary (from the client to our server) Source address type IPv4 Private - RFC1918 rewritten Routable ✔ rewritten Largest spoofable neighbor prefix length /28
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.
This test run probed the following paths in order to infer your ability to send different spoofed source packets. Each node in the graph corresponds to an autonomous system, i.e. different Internet service providers. NOTE: This graph does NOT show if an AS blocks spoofed packets, only the path taken by received spoofed packets. The IP Path Details are available for this run. If non-spoofed packets weren't received at a destination, the traceroute to that destination is not included in this graph and may even cause a totally empty graph.
IPv4 Adjacent Netblock Testing:
Your host (170.238.44.x/24) can spoof 15 neighboring addresses (within your /28 prefix)
Spoofed source address (anon) Prefix
ASN of spoofed
Received 170.238.44.x/24 /31 266317 no 170.238.44.x/24 /30 266317 no 170.238.44.x/24 /29 266317 yes 170.238.44.x/24 /28 266317 yes 170.238.44.x/24 /27 266317 rewritten 170.238.44.x/24 /26 266317 rewritten 170.238.44.x/24 /25 266317 rewritten 170.238.44.x/24 /24 266317 rewritten 170.238.45.x/24 /23 266317 rewritten 170.238.46.x/24 /22 266317 rewritten 170.238.40.x/24 /21 264795 rewritten 170.238.36.x/24 /20 266324 rewritten 170.238.60.x/24 /19 61649 rewritten 170.238.12.x/24 /18 266316 rewritten 170.238.108.x/24 /17 264812 rewritten 170.238.172.x/24 /16 262485 rewritten 170.239.44.x/24 /15 266339 rewritten 170.236.44.x/24 /14 UNROUTED rewritten 170.234.44.x/24 /13 UNROUTED rewritten 170.230.44.x/24 /12 UNROUTED rewritten 170.254.44.x/24 /11 265153 rewritten 170.206.44.x/24 /10 UNROUTED rewritten 170.174.44.x/24 /9 UNROUTED rewritten 170.110.44.x/24 /8 33343 rewritten
Meaning of status in Received column:
no Packets spoofed from adjacent netblock were not received, probably due to blocking yes Packets spoofed from adjacent netblock were received (but that netblock is within the source AS) rewritten The source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.
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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