Session Report
Summary:
Test run at: 2025-09-11 15:17:38 GMT
Client Prefix (v4): 5.59.249.x/24
Client AS (v4): 212271 (C1VFIBER-NET)
IPv4 Probes: 162
Client Prefix (v6): 2a05:4140:xx::/40
Client AS (v6): 212271 (C1VFIBER-NET)
| Outbound spoofing summary (from the client to our server) |
|---|
| Source address type |
IPv4 |
|---|
| Private -
RFC1918 |
✔ | blocked |
| Routable |
received |
| Largest spoofable neighbor prefix length |
/8 |
| 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 (5.59.249.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 5.59.249.x/24 | /31 | 212271 | yes |
| 5.59.249.x/24 | /30 | 212271 | yes |
| 5.59.249.x/24 | /29 | 212271 | yes |
| 5.59.249.x/24 | /28 | 212271 | yes |
| 5.59.249.x/24 | /27 | 212271 | yes |
| 5.59.249.x/24 | /26 | 212271 | yes |
| 5.59.249.x/24 | /25 | 212271 | yes |
| 5.59.249.x/24 | /24 | 212271 | yes |
| 5.59.248.x/24 | /23 | 212271 | yes |
| 5.59.251.x/24 | /22 | 212271 | yes |
| 5.59.253.x/24 | /21 | 212271 | yes |
| 5.59.241.x/24 | /20 | 212109 | yes |
| 5.59.233.x/24 | /19 | 59684 | yes |
| 5.59.217.x/24 | /18 | 61367 | yes |
| 5.59.185.x/24 | /17 | 48481 | yes |
| 5.59.121.x/24 | /16 | 44587 | yes |
| 5.58.249.x/24 | /15 | 16223 | yes |
| 5.57.249.x/24 | /14 | 42707 | yes |
| 5.63.249.x/24 | /13 | 21334 | yes |
| 5.51.249.x/24 | /12 | 5410 | yes |
| 5.43.249.x/24 | /11 | 198830 | yes |
| 5.27.249.x/24 | /10 | 16135 | yes |
| 5.123.249.x/24 | /9 | 44244 | yes |
| 5.187.249.x/24 | /8 | 5483 | yes |
Meaning of status in Received column:
| yes | Packets spoofed from adjacent netblock were received |
| 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 10 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.
