Session Report
Summary:
Test run at: 2021-02-27 15:45:59 GMT
Client Prefix (v4): 45.56.183.x/24
Client AS (v4): 30633 (LEASEWEB-USA-WDC)
IPv4 Probes: 69
| Outbound spoofing summary (from the client to our server) |
|---|
| Source address type |
IPv4 |
|---|
| Private -
RFC1918 |
blocked |
| Routable |
blocked |
| Largest spoofable neighbor prefix length |
/27 |
| 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 (45.56.183.x/24) can spoof 31 neighboring addresses (within your /27 prefix)
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 45.56.183.x/24 | /31 | 30633 | natblock |
| 45.56.183.x/24 | /30 | 30633 | natblock |
| 45.56.183.x/24 | /29 | 30633 | natblock |
| 45.56.183.x/24 | /28 | 30633 | natblock |
| 45.56.183.x/24 | /27 | 30633 | yes |
| 45.56.183.x/24 | /26 | 30633 | natblock |
| 45.56.183.x/24 | /25 | 30633 | natblock |
| 45.56.183.x/24 | /24 | 30633 | natblock |
| 45.56.182.x/24 | /23 | UNROUTED | natblock |
| 45.56.181.x/24 | /22 | 397615 | natblock |
| 45.56.179.x/24 | /21 | UNROUTED | natblock |
| 45.56.191.x/24 | /20 | 394868 | natblock |
| 45.56.167.x/24 | /19 | 8100 | natblock |
| 45.56.151.x/24 | /18 | UNROUTED | natblock |
| 45.56.247.x/24 | /17 | 203101 | natblock |
| 45.56.55.x/24 | /16 | 16591 | natblock |
| 45.57.183.x/24 | /15 | 55286 | natblock |
| 45.58.183.x/24 | /14 | 46844 | natblock |
| 45.60.183.x/24 | /13 | 19551 | natblock |
| 45.48.183.x/24 | /12 | 20001 | natblock |
| 45.40.183.x/24 | /11 | 398101 | natblock |
| 45.24.183.x/24 | /10 | 7018 | natblock |
| 45.120.183.x/24 | /9 | 38814 | natblock |
| 45.184.183.x/24 | /8 | 269393 | natblock |
Meaning of status in Received column:
| yes | Packets spoofed from adjacent netblock were received (but that netblock is within the source AS) |
| natblock | Spoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address. |
IPv4 Outbound Filtering Depth:
The tracefilter test found your host
able to spoof routable, non-adjacent source addresses through the
first 2 IP hop(s).
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.
