Session Report
Summary:
Test run at: 2024-02-03 08:28:11 GMT
Client Prefix (v4): 103.164.138.x/24
Client AS (v4): 135905 (VNPT-AS-VN)
IPv4 Probes: 66
| Outbound spoofing summary (from the client to our server) |
|---|
| Source address type |
IPv4 |
|---|
| Private -
RFC1918 |
✔ | blocked |
| Routable |
✔ | blocked |
| Largest spoofable neighbor prefix length |
/23 |
| 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 (103.164.138.x/24) can spoof 511 neighboring addresses (within your /23 prefix)
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 103.164.138.x/24 | /31 | 135905 | yes |
| 103.164.138.x/24 | /30 | 135905 | yes |
| 103.164.138.x/24 | /29 | 135905 | yes |
| 103.164.138.x/24 | /28 | 135905 | yes |
| 103.164.138.x/24 | /27 | 135905 | yes |
| 103.164.138.x/24 | /26 | 135905 | yes |
| 103.164.138.x/24 | /25 | 135905 | yes |
| 103.164.138.x/24 | /24 | 135905 | yes |
| 103.164.139.x/24 | /23 | 135905 | yes |
| 103.164.136.x/24 | /22 | 17995 | no |
| 103.164.142.x/24 | /21 | 141819 | no |
| 103.164.130.x/24 | /20 | 142005 | no |
| 103.164.154.x/24 | /19 | 135951 | no |
| 103.164.170.x/24 | /18 | 17995 | no |
| 103.164.202.x/24 | /17 | 141793 | no |
| 103.164.10.x/24 | /16 | UNROUTED | no |
| 103.165.138.x/24 | /15 | 17995 | no |
| 103.166.138.x/24 | /14 | UNROUTED | no |
| 103.160.138.x/24 | /13 | 38320 | no |
| 103.172.138.x/24 | /12 | 146990 | no |
| 103.180.138.x/24 | /11 | 135967 | no |
| 103.132.138.x/24 | /10 | 138539 | no |
| 103.228.138.x/24 | /9 | 4611 | no |
| 103.36.138.x/24 | /8 | 55994 | no |
Meaning of status in Received column:
| no | Packets spoofed from adjacent netblock were not received, probably due to blocking |
| yes | Packets spoofed from adjacent netblock were received (but that netblock is within the source AS) |
IPv4 Outbound Filtering Depth:
The tracefilter test found your host
able to spoof routable, non-adjacent source addresses through the
first 1 IP hop(s).
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.
