Session Report
Summary:
Test run at: 2021-02-27 15:48:56 GMT
Client Prefix (v4): 193.36.224.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 |
/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 (193.36.224.x/24) can spoof 255 neighboring addresses (within your /24 prefix)
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 193.36.224.x/24 | /31 | 8100 | natblock |
| 193.36.224.x/24 | /30 | 8100 | yes |
| 193.36.224.x/24 | /29 | 8100 | yes |
| 193.36.224.x/24 | /28 | 8100 | yes |
| 193.36.224.x/24 | /27 | 8100 | yes |
| 193.36.224.x/24 | /26 | 8100 | yes |
| 193.36.224.x/24 | /25 | 8100 | yes |
| 193.36.224.x/24 | /24 | 8100 | yes |
| 193.36.225.x/24 | /23 | 395954 | natblock |
| 193.36.226.x/24 | /22 | 8437 | natblock |
| 193.36.228.x/24 | /21 | 207027 | natblock |
| 193.36.232.x/24 | /20 | 210218 | natblock |
| 193.36.240.x/24 | /19 | 2856 | natblock |
| 193.36.192.x/24 | /18 | UNROUTED | natblock |
| 193.36.160.x/24 | /17 | UNROUTED | natblock |
| 193.36.96.x/24 | /16 | 29119 | natblock |
| 193.37.224.x/24 | /15 | 52052 | natblock |
| 193.38.224.x/24 | /14 | 209235 | natblock |
| 193.32.224.x/24 | /13 | 208187 | natblock |
| 193.44.224.x/24 | /12 | 3301 | natblock |
| 193.52.224.x/24 | /11 | 2200 | natblock |
| 193.4.224.x/24 | /10 | 12969 | natblock |
| 193.100.224.x/24 | /9 | 702 | natblock |
| 193.164.224.x/24 | /8 | 24647 | 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.
