Session Report
Summary:
Test run at: 2017-08-27 13:22:04 GMT
Client Prefix (v4): 5.1.80.x/24
Client AS (v4): 30823 (COMBAHTON)
IPv4 Probes: 117
| Outbound spoofing summary (from the client to our server) |
|---|
| Source address type |
IPv4 |
|---|
| Private -
RFC1918 |
✔ | blocked |
| Routable |
✔ | blocked |
| Largest spoofable neighbor prefix length |
/23 |
| 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 (5.1.80.x/24) can spoof 511 neighboring addresses (within your /23 prefix)
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 5.1.80.x/24 | /31 | 30823 | yes |
| 5.1.80.x/24 | /30 | 30823 | yes |
| 5.1.80.x/24 | /29 | 30823 | yes |
| 5.1.80.x/24 | /28 | 30823 | yes |
| 5.1.80.x/24 | /27 | 30823 | yes |
| 5.1.80.x/24 | /26 | 30823 | yes |
| 5.1.80.x/24 | /25 | 30823 | yes |
| 5.1.80.x/24 | /24 | 30823 | yes |
| 5.1.81.x/24 | /23 | 30823 | yes |
| 5.1.82.x/24 | /22 | 34549 | no |
| 5.1.84.x/24 | /21 | 34549 | no |
| 5.1.88.x/24 | /20 | 62217 | no |
| 5.1.64.x/24 | /19 | 34549 | no |
| 5.1.112.x/24 | /18 | 198738 | no |
| 5.1.16.x/24 | /17 | 21219 | no |
| 5.1.208.x/24 | /16 | 12638 | no |
| 5.0.80.x/24 | /15 | 29256 | no |
| 5.3.80.x/24 | /14 | 201083 | no |
| 5.5.80.x/24 | /13 | 12638 | no |
| 5.9.80.x/24 | /12 | 24940 | no |
| 5.17.80.x/24 | /11 | 41733 | no |
| 5.33.80.x/24 | /10 | 9158 | no |
| 5.65.80.x/24 | /9 | 5607 | no |
| 5.129.80.x/24 | /8 | 31200 | 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:
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and invite users to join the Spoofer
Users Mailing List for discussion and announcements.
