Session Report
Test run at: 2018-02-28 16:40:58 GMT
Client Prefix (v4): 185.112.249.x/24
Client AS (v4): 202939
IPv4 Probes: 102
Outbound spoofing summary (from the client to our server) Source address type IPv4 Private - RFC1918 ✔ rewritten 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 which rewrites the source addresses of the test traffic. To test your provider's network further, you must remove the NAT/firewall/router and connect directly.
This test run probed the following paths in order to infer your ability to send different spoofed source packets. Each node in the graph corresponds to an autonomous system, i.e. different Internet service providers. NOTE: This graph does NOT show if an AS blocks spoofed packets, only the path taken by received spoofed packets. The IP Path Details are available for this run. If non-spoofed packets weren't received at a destination, the traceroute to that destination is not included in this graph and may even cause a totally empty graph.
IPv4 Adjacent Netblock Testing:
Your host (185.112.249.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 185.112.249.x/24 /31 202939 yes 185.112.249.x/24 /30 202939 yes 185.112.249.x/24 /29 202939 yes 185.112.249.x/24 /28 202939 yes 185.112.249.x/24 /27 202939 yes 185.112.249.x/24 /26 202939 yes 185.112.249.x/24 /25 202939 yes 185.112.249.x/24 /24 202939 yes 185.112.248.x/24 /23 202939 yes 185.112.251.x/24 /22 202939 yes 185.112.253.x/24 /21 15987 yes 185.112.241.x/24 /20 UNROUTED no 185.112.233.x/24 /19 204152 yes 185.112.217.x/24 /18 25276 yes 185.112.185.x/24 /17 59878 rewritten 185.112.121.x/24 /16 201776 yes 185.113.249.x/24 /15 16171 yes 185.114.249.x/24 /14 204075 yes 185.116.249.x/24 /13 9063 yes 185.120.249.x/24 /12 43754 yes 185.96.249.x/24 /11 200765 yes 185.80.249.x/24 /10 50009 yes 185.48.249.x/24 /9 61424 yes 185.240.249.x/24 /8 39384 yes Meaning of status in Received column:
no Packets spoofed from adjacent netblock were not received, probably due to blocking yes Packets spoofed from adjacent netblock were received yes Packets spoofed from adjacent netblock were received (but that netblock is within the source AS) 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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