Session Report
Test run at: 2020-08-24 14:29:23 GMT
Client Prefix (v4): 151.236.23.x/24
Client AS (v4): 39020 (COMVIVE-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 /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 (151.236.23.x/24) can spoof 4194303 neighboring addresses (within your /10 prefix)
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 151.236.23.x/24 /31 39020 yes 151.236.23.x/24 /30 39020 yes 151.236.23.x/24 /29 39020 yes 151.236.23.x/24 /28 39020 yes 151.236.23.x/24 /27 39020 yes 151.236.23.x/24 /26 39020 yes 151.236.23.x/24 /25 39020 yes 151.236.23.x/24 /24 39020 yes 151.236.22.x/24 /23 29802 yes 151.236.21.x/24 /22 39326 yes 151.236.19.x/24 /21 39326 yes 151.236.31.x/24 /20 47692 yes 151.236.7.x/24 /19 57169 yes 151.236.55.x/24 /18 29550 yes 151.236.87.x/24 /17 57363 yes 151.236.151.x/24 /16 59599 yes 151.237.23.x/24 /15 UNROUTED natblock 151.238.23.x/24 /14 31549 yes 151.232.23.x/24 /13 58224 yes 151.228.23.x/24 /12 5607 yes 151.252.23.x/24 /11 UNROUTED natblock 151.204.23.x/24 /10 701 yes 151.172.23.x/24 /9 UNROUTED natblock 151.108.23.x/24 /8 UNROUTED 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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