Session Report
Summary:
Test run at: 2018-06-18 17:05:00 GMT
Client Prefix (v4): 134.255.219.x/24
Client AS (v4): 197071 (ACTIVE-SERVERS)
IPv4 Probes: 99
| 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 (134.255.219.x/24) can spoof 1023 neighboring addresses (within your /22 prefix)
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 134.255.219.x/24 | /31 | 197071 | yes |
| 134.255.219.x/24 | /30 | 197071 | yes |
| 134.255.219.x/24 | /29 | 197071 | yes |
| 134.255.219.x/24 | /28 | 197071 | yes |
| 134.255.219.x/24 | /27 | 197071 | yes |
| 134.255.219.x/24 | /26 | 197071 | yes |
| 134.255.219.x/24 | /25 | 197071 | yes |
| 134.255.219.x/24 | /24 | 197071 | yes |
| 134.255.218.x/24 | /23 | 197071 | yes |
| 134.255.217.x/24 | /22 | 197071 | yes |
| 134.255.223.x/24 | /21 | 197071 | no |
| 134.255.211.x/24 | /20 | 206057 | no |
| 134.255.203.x/24 | /19 | 16322 | no |
| 134.255.251.x/24 | /18 | 199610 | no |
| 134.255.155.x/24 | /17 | 48642 | no |
| 134.255.91.x/24 | /16 | 5483 | no |
| 134.254.219.x/24 | /15 | UNROUTED | no |
| 134.253.219.x/24 | /14 | 377 | no |
| 134.251.219.x/24 | /13 | UNROUTED | no |
| 134.247.219.x/24 | /12 | 34127 | no |
| 134.239.219.x/24 | /11 | UNROUTED | no |
| 134.223.219.x/24 | /10 | 1906 | no |
| 134.191.219.x/24 | /9 | 4983 | no |
| 134.127.219.x/24 | /8 | UNROUTED | 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.
