Session Report
Test run at: 2020-09-02 16:19:52 GMT
Client Prefix (v4): 172.98.67.x/24
Client AS (v4): 46562 (PERFORMIVE)
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server) Source address type IPv4 Private - RFC1918 rewritten Routable received Largest spoofable neighbor prefix length none
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 (172.98.67.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 172.98.67.x/24 /31 46562 rewritten 172.98.67.x/24 /30 46562 rewritten 172.98.67.x/24 /29 46562 rewritten 172.98.67.x/24 /28 46562 rewritten 172.98.67.x/24 /27 46562 rewritten 172.98.67.x/24 /26 46562 rewritten 172.98.67.x/24 /25 46562 rewritten 172.98.67.x/24 /24 46562 rewritten 172.98.66.x/24 /23 46562 rewritten 172.98.65.x/24 /22 46562 rewritten 172.98.71.x/24 /21 46562 rewritten 172.98.75.x/24 /20 46562 rewritten 172.98.83.x/24 /19 13213 rewritten 172.98.99.x/24 /18 53828 rewritten 172.98.3.x/24 /17 UNROUTED rewritten 172.98.195.x/24 /16 31863 rewritten 172.99.67.x/24 /15 27357 rewritten 172.96.67.x/24 /14 40317 rewritten 172.102.67.x/24 /13 5650 rewritten 172.106.67.x/24 /12 40676 rewritten 172.114.67.x/24 /11 20001 rewritten 172.66.67.x/24 /10 UNROUTED rewritten 172.34.67.x/24 /9 21928 rewritten 172.226.67.x/24 /8 UNROUTED rewritten Meaning of status in Received column:
rewritten The source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.
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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