Test run at: 2018-04-26 15:48:07 GMT
Client Prefix (v4): 217.194.176.x/24
Client AS (v4): 33986 (ASN-REDDER)
IPv4 Probes: 99
Outbound spoofing summary (from the client to our server) Source address type IPv4 Private - RFC1918 rewritten Routable ✔ blocked Largest spoofable neighbor prefix length /20
Meaning of result status in column:
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.
IPv4 Adjacent Netblock Testing:
Your host (217.194.176.x/24) can spoof 4095 neighboring addresses (within your /20 prefix)
Spoofed source address (anon) Prefix
ASN of spoofed
Received 217.194.176.x/24 /31 33986 yes 217.194.176.x/24 /30 33986 yes 217.194.176.x/24 /29 33986 yes 217.194.176.x/24 /28 33986 yes 217.194.176.x/24 /27 33986 yes 217.194.176.x/24 /26 33986 yes 217.194.176.x/24 /25 33986 yes 217.194.176.x/24 /24 33986 yes 217.194.177.x/24 /23 33986 yes 217.194.178.x/24 /22 33986 yes 217.194.180.x/24 /21 33986 yes 217.194.184.x/24 /20 33986 yes 217.194.160.x/24 /19 5610 natblock 217.194.144.x/24 /18 8513 natblock 217.194.240.x/24 /17 33993 natblock 217.194.48.x/24 /16 41622 natblock 217.195.176.x/24 /15 31027 natblock 217.192.176.x/24 /14 3303 natblock 217.198.176.x/24 /13 34217 natblock 217.202.176.x/24 /12 16232 natblock 217.210.176.x/24 /11 3301 natblock 217.226.176.x/24 /10 3320 natblock 217.130.176.x/24 /9 12430 natblock 217.66.176.x/24 /8 204332 natblock
Meaning of status in Received column:
yes Packets spoofed from adjacent netblock were received (but that netblock is within the source AS) 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 4 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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