Session Report
Test run at: 2020-09-03 03:24:57 GMT
Client Prefix (v4): 104.218.49.x/24
Client AS (v4): 19318 (IS-AS-1)
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server) Source address type IPv4 Private - RFC1918 received Routable received Largest spoofable neighbor prefix length /10
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.
Warnings:
- ⚠️ Your host is behind a Network Address Translation (NAT) router or firewall but spoofed packets are still being received without modification. See here for more information.
IPv4 Adjacent Netblock Testing:
Your host (104.218.49.x/24) can spoof 4194303 neighboring addresses (within your /10 prefix)
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 104.218.49.x/24 /31 19318 natblock 104.218.49.x/24 /30 19318 yes 104.218.49.x/24 /29 19318 natblock 104.218.49.x/24 /28 19318 yes 104.218.49.x/24 /27 19318 yes 104.218.49.x/24 /26 19318 yes 104.218.49.x/24 /25 19318 yes 104.218.49.x/24 /24 19318 yes 104.218.48.x/24 /23 19318 yes 104.218.51.x/24 /22 19318 yes 104.218.53.x/24 /21 19318 yes 104.218.57.x/24 /20 54133 yes 104.218.33.x/24 /19 393571 yes 104.218.17.x/24 /18 19969 yes 104.218.113.x/24 /17 13690 yes 104.218.177.x/24 /16 11139 yes 104.219.49.x/24 /15 53893 yes 104.216.49.x/24 /14 40676 yes 104.222.49.x/24 /13 64225 yes 104.210.49.x/24 /12 8075 yes 104.202.49.x/24 /11 18978 yes 104.250.49.x/24 /10 137280 yes 104.154.49.x/24 /9 15169 natblock 104.90.49.x/24 /8 16625 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 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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