Session Report
Summary:
Test run at: 2021-02-27 14:45:00 GMT
Client Prefix (v4): 85.203.22.x/24
Client AS (v4): 13213 (UK2NET-AS)
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 |
none |
| 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 (85.203.22.x/24) can spoof 0 neighboring addresses
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 85.203.22.x/24 | /31 | 13213 | natblock |
| 85.203.22.x/24 | /30 | 13213 | natblock |
| 85.203.22.x/24 | /29 | 13213 | natblock |
| 85.203.22.x/24 | /28 | 13213 | natblock |
| 85.203.22.x/24 | /27 | 13213 | natblock |
| 85.203.22.x/24 | /26 | 13213 | natblock |
| 85.203.22.x/24 | /25 | 13213 | natblock |
| 85.203.22.x/24 | /24 | 13213 | natblock |
| 85.203.23.x/24 | /23 | 36351 | natblock |
| 85.203.20.x/24 | /22 | 28753 | natblock |
| 85.203.18.x/24 | /21 | UNROUTED | natblock |
| 85.203.30.x/24 | /20 | 39855 | natblock |
| 85.203.6.x/24 | /19 | 31251 | natblock |
| 85.203.54.x/24 | /18 | UNROUTED | natblock |
| 85.203.86.x/24 | /17 | 30801 | natblock |
| 85.203.150.x/24 | /16 | 43557 | natblock |
| 85.202.22.x/24 | /15 | 207355 | natblock |
| 85.201.22.x/24 | /14 | 12392 | natblock |
| 85.207.22.x/24 | /13 | 25248 | natblock |
| 85.195.22.x/24 | /12 | 35706 | natblock |
| 85.219.22.x/24 | /11 | 6739 | natblock |
| 85.235.22.x/24 | /10 | 45011 | natblock |
| 85.139.22.x/24 | /9 | 2860 | natblock |
| 85.75.22.x/24 | /8 | 6799 | natblock |
Meaning of status in Received column:
| 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:
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and invite users to join the Spoofer
Users Mailing List for discussion and announcements.
