Session Report
Summary:
Test run at: 2020-10-15 19:12:10 GMT
Client Prefix (v4): 137.74.3.x/24
Client AS (v4): 16276 (OVH)
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 |
none |
| 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 (137.74.3.x/24) can spoof 0 neighboring addresses
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 137.74.3.x/24 | /31 | 16276 | no |
| 137.74.3.x/24 | /30 | 16276 | no |
| 137.74.3.x/24 | /29 | 16276 | no |
| 137.74.3.x/24 | /28 | 16276 | no |
| 137.74.3.x/24 | /27 | 16276 | no |
| 137.74.3.x/24 | /26 | 16276 | no |
| 137.74.3.x/24 | /25 | 16276 | no |
| 137.74.3.x/24 | /24 | 16276 | no |
| 137.74.2.x/24 | /23 | 16276 | no |
| 137.74.1.x/24 | /22 | 16276 | no |
| 137.74.7.x/24 | /21 | 16276 | no |
| 137.74.11.x/24 | /20 | 16276 | no |
| 137.74.19.x/24 | /19 | 16276 | no |
| 137.74.35.x/24 | /18 | 16276 | no |
| 137.74.67.x/24 | /17 | 16276 | no |
| 137.74.131.x/24 | /16 | 16276 | no |
| 137.75.3.x/24 | /15 | 3477 | no |
| 137.72.3.x/24 | /14 | UNROUTED | no |
| 137.78.3.x/24 | /13 | 127 | no |
| 137.66.3.x/24 | /12 | UNROUTED | no |
| 137.90.3.x/24 | /11 | 14977 | no |
| 137.106.3.x/24 | /10 | UNROUTED | no |
| 137.10.3.x/24 | /9 | 385 | no |
| 137.202.3.x/24 | /8 | 13541 | no |
Meaning of status in Received column:
| no | Packets spoofed from adjacent netblock were not received, probably due to blocking |
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:
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Users Mailing List for discussion and announcements.
