Session Report
Test run at: 2020-08-25 16:45:12 GMT
Client Prefix (v4): 37.235.53.x/24
Client AS (v4): 39020 (COMVIVE-AS)
IPv4 Probes: 75
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 (37.235.53.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 37.235.53.x/24 /31 39020 natblock 37.235.53.x/24 /30 39020 natblock 37.235.53.x/24 /29 39020 natblock 37.235.53.x/24 /28 39020 natblock 37.235.53.x/24 /27 39020 natblock 37.235.53.x/24 /26 39020 natblock 37.235.53.x/24 /25 39020 natblock 37.235.53.x/24 /24 39020 natblock 37.235.52.x/24 /23 28099 natblock 37.235.55.x/24 /22 24851 natblock 37.235.49.x/24 /21 50613 natblock 37.235.61.x/24 /20 57169 natblock 37.235.37.x/24 /19 43160 natblock 37.235.21.x/24 /18 5484 natblock 37.235.117.x/24 /17 35332 natblock 37.235.181.x/24 /16 41268 natblock 37.234.53.x/24 /15 8448 natblock 37.233.53.x/24 /14 31252 natblock 37.239.53.x/24 /13 50710 natblock 37.227.53.x/24 /12 24608 natblock 37.251.53.x/24 /11 49562 natblock 37.203.53.x/24 /10 51173 natblock 37.171.53.x/24 /9 51207 natblock 37.107.53.x/24 /8 25019 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:
We welcome questions and feedback to the Spoofer Information Mailing List and invite users to join the Spoofer Users Mailing List for discussion and announcements.