Session Report
Test run at: 2021-02-27 16:23:40 GMT
Client Prefix (v4): 185.192.16.x/24
Client AS (v4): 16247 (M247)
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 (185.192.16.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 185.192.16.x/24 /31 16247 yes 185.192.16.x/24 /30 16247 yes 185.192.16.x/24 /29 16247 yes 185.192.16.x/24 /28 16247 yes 185.192.16.x/24 /27 16247 yes 185.192.16.x/24 /26 16247 yes 185.192.16.x/24 /25 16247 yes 185.192.16.x/24 /24 16247 yes 185.192.17.x/24 /23 209014 yes 185.192.18.x/24 /22 39855 yes 185.192.20.x/24 /21 45382 yes 185.192.24.x/24 /20 51935 yes 185.192.0.x/24 /19 60781 yes 185.192.48.x/24 /18 60167 yes 185.192.80.x/24 /17 205389 yes 185.192.144.x/24 /16 197985 yes 185.193.16.x/24 /15 20473 yes 185.194.16.x/24 /14 UNROUTED natblock 185.196.16.x/24 /13 199290 yes 185.200.16.x/24 /12 56923 yes 185.208.16.x/24 /11 UNROUTED natblock 185.224.16.x/24 /10 205206 yes 185.128.16.x/24 /9 UNROUTED natblock 185.64.16.x/24 /8 201607 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 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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