Session Report
Test run at: 2020-08-21 16:42:55 GMT
Client Prefix (v4): 195.144.21.x/24
Client AS (v4): 174 (COGENT-174)
IPv4 Probes: 78
Outbound spoofing summary (from the client to our server) Source address type IPv4 Private - RFC1918 unknown Routable unknown 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 was unable to source even non-spoofed IPv4 UDP traffic to our servers. A firewall, router or other middlebox is preventing our testing. To test your provider's network further, you must remove the firewall or router and connect directly.
IPv4 Adjacent Netblock Testing:
Your host (195.144.21.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 195.144.21.x/24 /31 174 natblock 195.144.21.x/24 /30 174 natblock 195.144.21.x/24 /29 174 natblock 195.144.21.x/24 /28 174 natblock 195.144.21.x/24 /27 174 natblock 195.144.21.x/24 /26 174 natblock 195.144.21.x/24 /25 174 natblock 195.144.21.x/24 /24 174 natblock 195.144.20.x/24 /23 12301 natblock 195.144.23.x/24 /22 197883 natblock 195.144.17.x/24 /21 35414 natblock 195.144.29.x/24 /20 38954 natblock 195.144.5.x/24 /19 UNROUTED natblock 195.144.53.x/24 /18 3303 natblock 195.144.85.x/24 /17 8201 natblock 195.144.149.x/24 /16 UNROUTED natblock 195.145.21.x/24 /15 3320 natblock 195.146.21.x/24 /14 6663 natblock 195.148.21.x/24 /13 1741 natblock 195.152.21.x/24 /12 1290 natblock 195.128.21.x/24 /11 61157 natblock 195.176.21.x/24 /10 559 natblock 195.208.21.x/24 /9 UNROUTED natblock 195.16.21.x/24 /8 6848 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 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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