Session Report
Test run at: 2016-11-19 20:21:49 GMT
Client Prefix (v4): 185.22.141.x/24
Client AS (v4): 60294 (DE-DGW)
IPv4 Probes: 104
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 (185.22.141.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 185.22.141.x/24 /31 60294 rewritten 185.22.141.x/24 /30 60294 rewritten 185.22.141.x/24 /29 60294 rewritten 185.22.141.x/24 /28 60294 rewritten 185.22.141.x/24 /27 60294 rewritten 185.22.141.x/24 /26 60294 rewritten 185.22.141.x/24 /25 60294 rewritten 185.22.141.x/24 /24 60294 rewritten 185.22.140.x/24 /23 60294 rewritten 185.22.143.x/24 /22 60294 rewritten 185.22.137.x/24 /21 199057 rewritten 185.22.133.x/24 /20 60970 rewritten 185.22.157.x/24 /19 15405 rewritten 185.22.173.x/24 /18 43317 rewritten 185.22.205.x/24 /17 42339 rewritten 185.22.13.x/24 /16 62353 rewritten 185.23.141.x/24 /15 34968 rewritten 185.20.141.x/24 /14 UNROUTED rewritten 185.18.141.x/24 /13 35063 rewritten 185.30.141.x/24 /12 199581 rewritten 185.6.141.x/24 /11 43436 rewritten 185.54.141.x/24 /10 31122 rewritten 185.86.141.x/24 /9 51737 rewritten 185.150.141.x/24 /8 29256 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 unable to spoof routable, non-adjacent source addresses through even the first IP hop.Summary:
The results from all tests are aggregated to produce a summary "State of IP Spoofing" report.Feedback:
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