Session Report
Test run at: 2017-05-15 15:48:44 GMT
Client Prefix (v4): 37.143.19.x/24
Client AS (v4): 24739 (SEVEREN-TELECOM)
IPv4 Probes: 131
Outbound spoofing summary (from the client to our server) Source address type IPv4 Private - RFC1918 rewritten Routable rewritten 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 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.
IPv4 Adjacent Netblock Testing:
Your host (37.143.19.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 37.143.19.x/24 /31 24739 natblock 37.143.19.x/24 /30 24739 natblock 37.143.19.x/24 /29 24739 rewritten 37.143.19.x/24 /28 24739 rewritten 37.143.19.x/24 /27 24739 rewritten 37.143.19.x/24 /26 24739 rewritten 37.143.19.x/24 /25 24739 rewritten 37.143.19.x/24 /24 24739 rewritten 37.143.18.x/24 /23 24739 rewritten 37.143.17.x/24 /22 24739 rewritten 37.143.23.x/24 /21 24739 rewritten 37.143.27.x/24 /20 24739 rewritten 37.143.3.x/24 /19 47537 rewritten 37.143.51.x/24 /18 UNROUTED rewritten 37.143.83.x/24 /17 50266 rewritten 37.143.147.x/24 /16 58256 rewritten 37.142.19.x/24 /15 12849 rewritten 37.141.19.x/24 /14 35819 rewritten 37.139.19.x/24 /13 14061 rewritten 37.135.19.x/24 /12 12715 rewritten 37.159.19.x/24 /11 30722 rewritten 37.175.19.x/24 /10 51207 rewritten 37.207.19.x/24 /9 3269 rewritten 37.15.19.x/24 /8 12715 rewritten Meaning of status in Received column:
natblock Spoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address. 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 1 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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