Session Report
Summary:
Test run at: 2023-05-24 22:18:50 GMT
Client Prefix (v4): 141.255.166.x/24
Client AS (v4): 51852 (PLI-AS)
IPv4 Probes: 60
| Outbound spoofing summary (from the client to our server) |
|---|
| Source address type |
IPv4 |
|---|
| Private -
RFC1918 |
blocked |
| Routable |
blocked |
| Largest spoofable neighbor prefix length |
/21 |
| 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 (141.255.166.x/24) can spoof 2047 neighboring addresses (within your /21 prefix)
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 141.255.166.x/24 | /31 | 51852 | yes |
| 141.255.166.x/24 | /30 | 51852 | yes |
| 141.255.166.x/24 | /29 | 51852 | yes |
| 141.255.166.x/24 | /28 | 51852 | yes |
| 141.255.166.x/24 | /27 | 51852 | yes |
| 141.255.166.x/24 | /26 | 51852 | yes |
| 141.255.166.x/24 | /25 | 51852 | yes |
| 141.255.166.x/24 | /24 | 51852 | yes |
| 141.255.167.x/24 | /23 | 51852 | yes |
| 141.255.164.x/24 | /22 | 51852 | yes |
| 141.255.162.x/24 | /21 | 51852 | yes |
| 141.255.174.x/24 | /20 | 16364 | no |
| 141.255.182.x/24 | /19 | 31586 | no |
| 141.255.134.x/24 | /18 | 199636 | no |
| 141.255.230.x/24 | /17 | 2107 | no |
| 141.255.38.x/24 | /16 | 3329 | no |
| 141.254.166.x/24 | /15 | UNROUTED | no |
| 141.253.166.x/24 | /14 | UNROUTED | no |
| 141.251.166.x/24 | /13 | UNROUTED | no |
| 141.247.166.x/24 | /12 | UNROUTED | no |
| 141.239.166.x/24 | /11 | 36149 | no |
| 141.223.166.x/24 | /10 | 3784 | no |
| 141.191.166.x/24 | /9 | UNROUTED | no |
| 141.127.166.x/24 | /8 | 719 | 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 2 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.
