Session Report
Test run at: 2020-08-25 16:15:37 GMT
Client Prefix (v4): 200.122.128.x/24
Client AS (v4): 3790
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 (200.122.128.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 200.122.128.x/24 /31 3790 rewritten 200.122.128.x/24 /30 3790 rewritten 200.122.128.x/24 /29 3790 rewritten 200.122.128.x/24 /28 3790 rewritten 200.122.128.x/24 /27 3790 rewritten 200.122.128.x/24 /26 3790 rewritten 200.122.128.x/24 /25 3790 rewritten 200.122.128.x/24 /24 3790 rewritten 200.122.129.x/24 /23 3790 rewritten 200.122.130.x/24 /22 3790 rewritten 200.122.132.x/24 /21 3790 rewritten 200.122.136.x/24 /20 3790 rewritten 200.122.144.x/24 /19 3790 rewritten 200.122.160.x/24 /18 3790 rewritten 200.122.192.x/24 /17 13489 rewritten 200.122.0.x/24 /16 10481 rewritten 200.123.128.x/24 /15 16814 rewritten 200.120.128.x/24 /14 22047 rewritten 200.126.128.x/24 /13 10481 rewritten 200.114.128.x/24 /12 10481 rewritten 200.106.128.x/24 /11 UNROUTED rewritten 200.90.128.x/24 /10 21599 rewritten 200.58.128.x/24 /9 19422 rewritten 200.250.128.x/24 /8 4230 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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