Session Report
Test run at: 2020-09-03 04:03:42 GMT
Client Prefix (v4): 92.118.12.x/24
Client AS (v4): 201011 (NETZBETRIEB-GMBH)
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server) Source address type IPv4 Private - RFC1918 blocked 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 (92.118.12.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 92.118.12.x/24 /31 201011 natblock 92.118.12.x/24 /30 201011 yes 92.118.12.x/24 /29 201011 yes 92.118.12.x/24 /28 201011 yes 92.118.12.x/24 /27 201011 yes 92.118.12.x/24 /26 201011 yes 92.118.12.x/24 /25 201011 yes 92.118.12.x/24 /24 201011 yes 92.118.13.x/24 /23 29066 yes 92.118.14.x/24 /22 13213 yes 92.118.8.x/24 /21 UNROUTED natblock 92.118.4.x/24 /20 UNROUTED natblock 92.118.28.x/24 /19 205479 yes 92.118.44.x/24 /18 9009 yes 92.118.76.x/24 /17 57049 yes 92.118.140.x/24 /16 42742 yes 92.119.12.x/24 /15 UNROUTED natblock 92.116.12.x/24 /14 8881 yes 92.114.12.x/24 /13 12663 yes 92.126.12.x/24 /12 12389 yes 92.102.12.x/24 /11 12670 yes 92.86.12.x/24 /10 9050 yes 92.54.12.x/24 /9 8426 yes 92.246.12.x/24 /8 43557 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 2 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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