Session Report
Summary:
Test run at: 2023-12-30 11:27:00 GMT
Client Prefix (v4): 37.123.199.x/24
Client AS (v4): 41378 (KirinoNET)
IPv4 Probes: 69
| Outbound spoofing summary (from the client to our server) |
|---|
| Source address type |
IPv4 |
|---|
| Private -
RFC1918 |
✔ | blocked |
| Routable |
✔ | blocked |
| Largest spoofable neighbor prefix length |
/22 |
| 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 (37.123.199.x/24) can spoof 1023 neighboring addresses (within your /22 prefix)
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 37.123.199.x/24 | /31 | 41378 | yes |
| 37.123.199.x/24 | /30 | 41378 | yes |
| 37.123.199.x/24 | /29 | 41378 | yes |
| 37.123.199.x/24 | /28 | 41378 | yes |
| 37.123.199.x/24 | /27 | 41378 | yes |
| 37.123.199.x/24 | /26 | 41378 | yes |
| 37.123.199.x/24 | /25 | 41378 | yes |
| 37.123.199.x/24 | /24 | 41378 | yes |
| 37.123.198.x/24 | /23 | 41378 | yes |
| 37.123.197.x/24 | /22 | 41378 | yes |
| 37.123.195.x/24 | /21 | 41378 | no |
| 37.123.207.x/24 | /20 | 35378 | no |
| 37.123.215.x/24 | /19 | UNROUTED | no |
| 37.123.231.x/24 | /18 | 49232 | no |
| 37.123.135.x/24 | /17 | 8473 | no |
| 37.123.71.x/24 | /16 | 42912 | no |
| 37.122.199.x/24 | /15 | 206405 | no |
| 37.121.199.x/24 | /14 | 35819 | no |
| 37.127.199.x/24 | /13 | 34400 | no |
| 37.115.199.x/24 | /12 | 15895 | no |
| 37.107.199.x/24 | /11 | 25019 | no |
| 37.91.199.x/24 | /10 | 3320 | no |
| 37.59.199.x/24 | /9 | 16276 | no |
| 37.251.199.x/24 | /8 | UNROUTED | 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
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.
