Test run at: 2016-11-02 19:34:22 GMT
Client Prefix (v4): 77.87.50.x/24
Client AS (v4): 44194 (FREIFUNK-BERLIN-AS)
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:
IPv4 Adjacent Netblock Testing:
Your host (77.87.50.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 77.87.50.x/24 /31 44194 natblock 77.87.50.x/24 /30 44194 natblock 77.87.50.x/24 /29 44194 natblock 77.87.50.x/24 /28 44194 natblock 77.87.50.x/24 /27 44194 natblock 77.87.50.x/24 /26 44194 natblock 77.87.50.x/24 /25 44194 natblock 77.87.50.x/24 /24 44194 natblock 77.87.51.x/24 /23 44194 natblock 77.87.48.x/24 /22 44194 natblock 77.87.54.x/24 /21 44194 natblock 77.87.58.x/24 /20 UNROUTED natblock 77.87.34.x/24 /19 UNROUTED natblock 77.87.18.x/24 /18 42838 natblock 77.87.114.x/24 /17 51281 natblock 77.87.178.x/24 /16 43338 natblock 77.86.50.x/24 /15 12390 natblock 77.85.50.x/24 /14 8866 natblock 77.83.50.x/24 /13 UNROUTED natblock 77.95.50.x/24 /12 39039 natblock 77.71.50.x/24 /11 29687 natblock 77.119.50.x/24 /10 25255 natblock 77.23.50.x/24 /9 31334 natblock 77.215.50.x/24 /8 9158 natblock 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.
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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