Session Report
Test run at: 2020-08-24 14:42:17 GMT
Client Prefix (v4): 109.169.25.x/24
Client AS (v4): 20860 (IOMART-AS)
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 /9
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 (109.169.25.x/24) can spoof 8388607 neighboring addresses (within your /9 prefix)
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 109.169.25.x/24 /31 20860 natblock 109.169.25.x/24 /30 20860 natblock 109.169.25.x/24 /29 20860 natblock 109.169.25.x/24 /28 20860 natblock 109.169.25.x/24 /27 20860 natblock 109.169.25.x/24 /26 20860 yes 109.169.25.x/24 /25 20860 yes 109.169.25.x/24 /24 20860 yes 109.169.24.x/24 /23 20860 yes 109.169.27.x/24 /22 20860 yes 109.169.29.x/24 /21 20860 yes 109.169.17.x/24 /20 20860 yes 109.169.9.x/24 /19 20860 yes 109.169.57.x/24 /18 20860 yes 109.169.89.x/24 /17 20860 yes 109.169.153.x/24 /16 12389 natblock 109.168.25.x/24 /15 5602 natblock 109.171.25.x/24 /14 21127 yes 109.173.25.x/24 /13 42610 yes 109.161.25.x/24 /12 12389 yes 109.185.25.x/24 /11 8926 yes 109.137.25.x/24 /10 5432 natblock 109.233.25.x/24 /9 41008 yes 109.41.25.x/24 /8 3209 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 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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