Session Report
Summary:
Test run at: 2020-10-08 17:05:50 GMT
Client Prefix (v4): 141.101.148.x/24
Client AS (v4): 199524 (GCORE)
IPv4 Probes: 75
| Outbound spoofing summary (from the client to our server) |
|---|
| Source address type |
IPv4 |
|---|
| Private -
RFC1918 |
blocked |
| Routable |
received |
| Largest spoofable neighbor prefix length |
/9 |
| 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 (141.101.148.x/24) can spoof 8388607 neighboring addresses (within your /9 prefix)
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 141.101.148.x/24 | /31 | 199524 | yes |
| 141.101.148.x/24 | /30 | 199524 | yes |
| 141.101.148.x/24 | /29 | 199524 | yes |
| 141.101.148.x/24 | /28 | 199524 | yes |
| 141.101.148.x/24 | /27 | 199524 | yes |
| 141.101.148.x/24 | /26 | 199524 | yes |
| 141.101.148.x/24 | /25 | 199524 | yes |
| 141.101.148.x/24 | /24 | 199524 | yes |
| 141.101.149.x/24 | /23 | 40676 | yes |
| 141.101.150.x/24 | /22 | 9009 | yes |
| 141.101.144.x/24 | /21 | 9009 | yes |
| 141.101.156.x/24 | /20 | 55286 | yes |
| 141.101.132.x/24 | /19 | 58272 | yes |
| 141.101.180.x/24 | /18 | 24774 | yes |
| 141.101.212.x/24 | /17 | 197998 | yes |
| 141.101.20.x/24 | /16 | 31272 | yes |
| 141.100.148.x/24 | /15 | 8365 | yes |
| 141.103.148.x/24 | /14 | UNROUTED | no |
| 141.97.148.x/24 | /13 | UNROUTED | no |
| 141.109.148.x/24 | /12 | 40007 | yes |
| 141.117.148.x/24 | /11 | 26996 | yes |
| 141.69.148.x/24 | /10 | 553 | yes |
| 141.37.148.x/24 | /9 | 553 | yes |
| 141.229.148.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 |
| 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:
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and invite users to join the Spoofer
Users Mailing List for discussion and announcements.
