Session Report
Summary:
Test run at: 2019-02-17 14:38:44 GMT
Client Prefix (v4): 185.202.172.x/24
Client AS (v4): 174 (COGENT-174)
IPv4 Probes: 116
| Outbound spoofing summary (from the client to our server) |
|---|
| Source address type |
IPv4 |
|---|
| Private -
RFC1918 |
blocked |
| Routable |
received |
| Largest spoofable neighbor prefix length |
/8 |
| 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 (185.202.172.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 185.202.172.x/24 | /31 | 174 | yes |
| 185.202.172.x/24 | /30 | 174 | yes |
| 185.202.172.x/24 | /29 | 174 | yes |
| 185.202.172.x/24 | /28 | 174 | yes |
| 185.202.172.x/24 | /27 | 174 | yes |
| 185.202.172.x/24 | /26 | 174 | yes |
| 185.202.172.x/24 | /25 | 174 | yes |
| 185.202.172.x/24 | /24 | 174 | yes |
| 185.202.173.x/24 | /23 | 174 | yes |
| 185.202.174.x/24 | /22 | 174 | yes |
| 185.202.168.x/24 | /21 | 197328 | yes |
| 185.202.164.x/24 | /20 | 43160 | yes |
| 185.202.188.x/24 | /19 | 205888 | yes |
| 185.202.140.x/24 | /18 | 42411 | yes |
| 185.202.236.x/24 | /17 | 46261 | yes |
| 185.202.44.x/24 | /16 | 46261 | yes |
| 185.203.172.x/24 | /15 | 3269 | yes |
| 185.200.172.x/24 | /14 | UNROUTED | no |
| 185.206.172.x/24 | /13 | 21277 | yes |
| 185.194.172.x/24 | /12 | 206163 | yes |
| 185.218.172.x/24 | /11 | 35334 | yes |
| 185.234.172.x/24 | /10 | 204947 | yes |
| 185.138.172.x/24 | /9 | 203322 | yes |
| 185.74.172.x/24 | /8 | 50290 | yes |
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 |
| 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
able to spoof routable, non-adjacent source addresses through the
first 10 IP hop(s).
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.
