Session Report
Summary:
Test run at: 2025-04-05 22:07:48 GMT
Client Prefix (v4): 202.78.161.x/24
Client AS (v4): 199524 (GCORE)
IPv4 Probes: 162
| Outbound spoofing summary (from the client to our server) |
|---|
| Source address type |
IPv4 |
|---|
| Private -
RFC1918 |
blocked |
| Routable |
blocked |
| 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. |
IPv4 Adjacent Netblock Testing:
Your host (202.78.161.x/24) can spoof 0 neighboring addresses
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 202.78.161.x/24 | /31 | 199524 | no |
| 202.78.161.x/24 | /30 | 199524 | no |
| 202.78.161.x/24 | /29 | 199524 | no |
| 202.78.161.x/24 | /28 | 199524 | no |
| 202.78.161.x/24 | /27 | 199524 | no |
| 202.78.161.x/24 | /26 | 199524 | no |
| 202.78.161.x/24 | /25 | 199524 | no |
| 202.78.161.x/24 | /24 | 199524 | no |
| 202.78.160.x/24 | /23 | 202422 | no |
| 202.78.163.x/24 | /22 | 199524 | no |
| 202.78.165.x/24 | /21 | UNROUTED | no |
| 202.78.169.x/24 | /20 | UNROUTED | no |
| 202.78.177.x/24 | /19 | 4721 | no |
| 202.78.129.x/24 | /18 | 4768 | no |
| 202.78.225.x/24 | /17 | 24085 | no |
| 202.78.33.x/24 | /16 | UNROUTED | no |
| 202.79.161.x/24 | /15 | 64050 | no |
| 202.76.161.x/24 | /14 | UNROUTED | no |
| 202.74.161.x/24 | /13 | 7604 | no |
| 202.70.161.x/24 | /12 | 17990 | no |
| 202.94.161.x/24 | /11 | 133001 | no |
| 202.110.161.x/24 | /10 | 4134 | no |
| 202.14.161.x/24 | /9 | UNROUTED | no |
| 202.206.161.x/24 | /8 | 4538 | 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.
