Session Report
Summary:
Test run at: 2017-06-30 19:19:14 GMT
Client Prefix (v4): 89.34.237.x/24
Client AS (v4): 25198 (ZetServers)
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 |
/24 |
| 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 (89.34.237.x/24) can spoof 255 neighboring addresses (within your /24 prefix)
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 89.34.237.x/24 | /31 | 25198 | yes |
| 89.34.237.x/24 | /30 | 25198 | yes |
| 89.34.237.x/24 | /29 | 25198 | yes |
| 89.34.237.x/24 | /28 | 25198 | yes |
| 89.34.237.x/24 | /27 | 25198 | yes |
| 89.34.237.x/24 | /26 | 25198 | yes |
| 89.34.237.x/24 | /25 | 25198 | yes |
| 89.34.237.x/24 | /24 | 25198 | yes |
| 89.34.236.x/24 | /23 | 6718 | no |
| 89.34.239.x/24 | /22 | 9050 | no |
| 89.34.233.x/24 | /21 | 8926 | no |
| 89.34.229.x/24 | /20 | 39543 | no |
| 89.34.253.x/24 | /19 | 48159 | no |
| 89.34.205.x/24 | /18 | 8926 | no |
| 89.34.173.x/24 | /17 | 57446 | no |
| 89.34.109.x/24 | /16 | 44203 | no |
| 89.35.237.x/24 | /15 | 34304 | no |
| 89.32.237.x/24 | /14 | 39279 | no |
| 89.38.237.x/24 | /13 | UNROUTED | no |
| 89.42.237.x/24 | /12 | 48095 | no |
| 89.50.237.x/24 | /11 | 5430 | no |
| 89.2.237.x/24 | /10 | 21502 | no |
| 89.98.237.x/24 | /9 | 6830 | no |
| 89.162.237.x/24 | /8 | 12530 | 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.
