Session Report
Test run at: 2021-02-27 16:42:43 GMT
Client Prefix (v4): 45.67.96.x/24
Client AS (v4): 45671 (AS45671-NET-AU)
IPv4 Probes: 69
Outbound spoofing summary (from the client to our server) Source address type IPv4 Private - RFC1918 received Routable received Largest spoofable neighbor prefix length /8
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 (45.67.96.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 45.67.96.x/24 /31 45671 natblock 45.67.96.x/24 /30 45671 natblock 45.67.96.x/24 /29 45671 yes 45.67.96.x/24 /28 45671 yes 45.67.96.x/24 /27 45671 yes 45.67.96.x/24 /26 45671 yes 45.67.96.x/24 /25 45671 yes 45.67.96.x/24 /24 45671 yes 45.67.97.x/24 /23 UNROUTED yes 45.67.98.x/24 /22 49981 yes 45.67.100.x/24 /21 9009 yes 45.67.104.x/24 /20 208973 yes 45.67.112.x/24 /19 209970 yes 45.67.64.x/24 /18 50628 yes 45.67.32.x/24 /17 48430 yes 45.67.224.x/24 /16 204287 yes 45.66.96.x/24 /15 43209 yes 45.65.96.x/24 /14 209899 yes 45.71.96.x/24 /13 267603 yes 45.75.96.x/24 /12 38628 yes 45.83.96.x/24 /11 25465 yes 45.99.96.x/24 /10 37069 yes 45.3.96.x/24 /9 40220 yes 45.195.96.x/24 /8 328608 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:
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