Test run at: 2023-07-23 14:02:43 GMT
Client Prefix (v4): 154.72.171.x/24
Client AS (v4): 15964 (CAMNET-AS)
IPv4 Probes: 60
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 (154.72.171.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) Prefix
ASN of spoofed
Received 154.72.171.x/24 /31 15964 rewritten 154.72.171.x/24 /30 15964 rewritten 154.72.171.x/24 /29 15964 rewritten 154.72.171.x/24 /28 15964 rewritten 154.72.171.x/24 /27 15964 rewritten 154.72.171.x/24 /26 15964 rewritten 154.72.171.x/24 /25 15964 rewritten 154.72.171.x/24 /24 15964 natblock 154.72.170.x/24 /23 15964 rewritten 154.72.169.x/24 /22 15964 natblock 154.72.175.x/24 /21 UNROUTED rewritten 154.72.163.x/24 /20 15964 rewritten 154.72.187.x/24 /19 15964 rewritten 154.72.139.x/24 /18 15964 rewritten 154.72.235.x/24 /17 37693 rewritten 154.72.43.x/24 /16 4809 natblock 154.73.171.x/24 /15 327819 rewritten 154.74.171.x/24 /14 37035 natblock 154.76.171.x/24 /13 36926 rewritten 154.64.171.x/24 /12 174 rewritten 154.88.171.x/24 /11 328608 natblock 154.104.171.x/24 /10 37693 rewritten 154.8.171.x/24 /9 45090 natblock 154.200.171.x/24 /8 UNROUTED rewritten
Meaning of status in Received column:
natblock Spoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address. 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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