Test run at: 2021-08-02 19:30:15 GMT
Client Prefix (v4): 187.0.36.x/24
Client AS (v4): 270670
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 none
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 (187.0.36.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) Prefix
ASN of spoofed
Received 187.0.36.x/24 /31 270670 rewritten 187.0.36.x/24 /30 270670 rewritten 187.0.36.x/24 /29 270670 rewritten 187.0.36.x/24 /28 270670 rewritten 187.0.36.x/24 /27 270670 rewritten 187.0.36.x/24 /26 270670 rewritten 187.0.36.x/24 /25 270670 rewritten 187.0.36.x/24 /24 270670 rewritten 187.0.37.x/24 /23 270670 rewritten 187.0.38.x/24 /22 270670 rewritten 187.0.32.x/24 /21 270604 rewritten 187.0.44.x/24 /20 270589 rewritten 187.0.52.x/24 /19 28352 rewritten 187.0.4.x/24 /18 28283 rewritten 187.0.100.x/24 /17 22689 rewritten 187.0.164.x/24 /16 262732 rewritten 187.1.36.x/24 /15 28246 rewritten 187.2.36.x/24 /14 28573 rewritten 187.4.36.x/24 /13 8167 rewritten 187.8.36.x/24 /12 10429 rewritten 187.16.36.x/24 /11 11835 rewritten 187.32.36.x/24 /10 16735 rewritten 187.64.36.x/24 /9 28573 rewritten 187.128.36.x/24 /8 UNROUTED rewritten
Meaning of status in Received column:
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 unable to spoof routable, non-adjacent source addresses through even the first IP hop.Summary:
The results from all tests are aggregated to produce a summary "State of IP Spoofing" report.Feedback:
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