Session Report
Summary:
Test run at: 2020-05-24 09:48:53 GMT
Client Prefix (v4): 37.247.108.x/24
Client AS (v4): 43260 (AS43260)
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 |
/22 |
| 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 (37.247.108.x/24) can spoof 1023 neighboring addresses (within your /22 prefix)
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 37.247.108.x/24 | /31 | 43260 | yes |
| 37.247.108.x/24 | /30 | 43260 | yes |
| 37.247.108.x/24 | /29 | 43260 | yes |
| 37.247.108.x/24 | /28 | 43260 | yes |
| 37.247.108.x/24 | /27 | 43260 | yes |
| 37.247.108.x/24 | /26 | 43260 | yes |
| 37.247.108.x/24 | /25 | 43260 | yes |
| 37.247.108.x/24 | /24 | 43260 | yes |
| 37.247.109.x/24 | /23 | 43260 | no |
| 37.247.110.x/24 | /22 | 43260 | yes |
| 37.247.104.x/24 | /21 | 43260 | no |
| 37.247.100.x/24 | /20 | 43260 | no |
| 37.247.124.x/24 | /19 | 15954 | no |
| 37.247.76.x/24 | /18 | 21413 | no |
| 37.247.44.x/24 | /17 | 25459 | no |
| 37.247.236.x/24 | /16 | 57811 | no |
| 37.246.108.x/24 | /15 | 57598 | no |
| 37.245.108.x/24 | /14 | 5384 | no |
| 37.243.108.x/24 | /13 | 34400 | no |
| 37.255.108.x/24 | /12 | 58224 | no |
| 37.231.108.x/24 | /11 | 47589 | no |
| 37.215.108.x/24 | /10 | 6697 | no |
| 37.183.108.x/24 | /9 | 30722 | no |
| 37.119.108.x/24 | /8 | 30722 | 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.
