Session Report
Summary:
Test run at: 2020-10-08 16:58:37 GMT
Client Prefix (v4): 45.74.36.x/24
Client AS (v4): 36351 (SOFTLAYER)
IPv4 Probes: 75
| Outbound spoofing summary (from the client to our server) |
|---|
| Source address type |
IPv4 |
|---|
| Private -
RFC1918 |
blocked |
| Routable |
blocked |
| Largest spoofable neighbor prefix length |
/24 |
| 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 (45.74.36.x/24) can spoof 255 neighboring addresses (within your /24 prefix)
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 45.74.36.x/24 | /31 | 36351 | yes |
| 45.74.36.x/24 | /30 | 36351 | yes |
| 45.74.36.x/24 | /29 | 36351 | yes |
| 45.74.36.x/24 | /28 | 36351 | yes |
| 45.74.36.x/24 | /27 | 36351 | yes |
| 45.74.36.x/24 | /26 | 36351 | yes |
| 45.74.36.x/24 | /25 | 36351 | yes |
| 45.74.36.x/24 | /24 | 36351 | yes |
| 45.74.37.x/24 | /23 | 45671 | no |
| 45.74.38.x/24 | /22 | 9009 | no |
| 45.74.32.x/24 | /21 | 55286 | no |
| 45.74.44.x/24 | /20 | 9009 | no |
| 45.74.52.x/24 | /19 | 46562 | no |
| 45.74.4.x/24 | /18 | 9009 | no |
| 45.74.100.x/24 | /17 | 40788 | no |
| 45.74.164.x/24 | /16 | 19397 | no |
| 45.75.36.x/24 | /15 | 38628 | no |
| 45.72.36.x/24 | /14 | 55286 | no |
| 45.78.36.x/24 | /13 | 25820 | no |
| 45.66.36.x/24 | /12 | 43915 | no |
| 45.90.36.x/24 | /11 | 8896 | no |
| 45.106.36.x/24 | /10 | 37069 | no |
| 45.10.36.x/24 | /9 | UNROUTED | no |
| 45.202.36.x/24 | /8 | 139086 | 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.
