Session Report
Summary:
Test run at: 2021-02-27 15:53:28 GMT
Client Prefix (v4): 104.238.46.x/24
Client AS (v4): 8100 (ASN-QUADRANET-GLOBAL)
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 |
/23 |
| 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 (104.238.46.x/24) can spoof 511 neighboring addresses (within your /23 prefix)
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 104.238.46.x/24 | /31 | 8100 | yes |
| 104.238.46.x/24 | /30 | 8100 | natblock |
| 104.238.46.x/24 | /29 | 8100 | yes |
| 104.238.46.x/24 | /28 | 8100 | yes |
| 104.238.46.x/24 | /27 | 8100 | yes |
| 104.238.46.x/24 | /26 | 8100 | yes |
| 104.238.46.x/24 | /25 | 8100 | yes |
| 104.238.46.x/24 | /24 | 8100 | yes |
| 104.238.47.x/24 | /23 | 8100 | yes |
| 104.238.44.x/24 | /22 | 60068 | natblock |
| 104.238.42.x/24 | /21 | UNROUTED | natblock |
| 104.238.38.x/24 | /20 | 62874 | natblock |
| 104.238.62.x/24 | /19 | 206092 | natblock |
| 104.238.14.x/24 | /18 | 3356 | natblock |
| 104.238.110.x/24 | /17 | 26496 | natblock |
| 104.238.174.x/24 | /16 | 20473 | natblock |
| 104.239.46.x/24 | /15 | 13886 | natblock |
| 104.236.46.x/24 | /14 | 14061 | natblock |
| 104.234.46.x/24 | /13 | 30407 | natblock |
| 104.230.46.x/24 | /12 | 10796 | natblock |
| 104.254.46.x/24 | /11 | UNROUTED | natblock |
| 104.206.46.x/24 | /10 | 62904 | natblock |
| 104.174.46.x/24 | /9 | 20001 | natblock |
| 104.110.46.x/24 | /8 | 28573 | 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
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.
