Session Report
Test run at: 2026-05-20 15:15:59 GMT
Client Prefix (v4): 103.102.135.x/24
Client AS (v4): 216075 (EtherLinx)
IPv4 Probes: 162
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 (103.102.135.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 103.102.135.x/24 /31 216075 no 103.102.135.x/24 /30 216075 no 103.102.135.x/24 /29 216075 no 103.102.135.x/24 /28 216075 no 103.102.135.x/24 /27 216075 no 103.102.135.x/24 /26 216075 no 103.102.135.x/24 /25 216075 no 103.102.135.x/24 /24 216075 no 103.102.134.x/24 /23 21859 no 103.102.133.x/24 /22 UNROUTED no 103.102.131.x/24 /21 149139 no 103.102.143.x/24 /20 136854 no 103.102.151.x/24 /19 UNROUTED no 103.102.167.x/24 /18 135464 no 103.102.199.x/24 /17 63603 no 103.102.7.x/24 /16 UNROUTED no 103.103.135.x/24 /15 45117 no 103.100.135.x/24 /14 55699 no 103.98.135.x/24 /13 136911 no 103.110.135.x/24 /12 4837 no 103.118.135.x/24 /11 4787 no 103.70.135.x/24 /10 9422 no 103.38.135.x/24 /9 UNROUTED no 103.230.135.x/24 /8 132280 no Meaning of status in Received column:
no Packets spoofed from adjacent netblock were not received, probably due to blocking
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.