Session Report
Summary:
Test run at: 2020-09-05 21:06:09 GMT
Client Prefix (v4): 191.232.172.x/24
Client AS (v4): 8075 (MICROSOFT-CORP-MSN-AS-BLOCK)
IPv4 Probes: 75
| 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 (191.232.172.x/24) can spoof 0 neighboring addresses
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 191.232.172.x/24 | /31 | 8075 | natblock |
| 191.232.172.x/24 | /30 | 8075 | natblock |
| 191.232.172.x/24 | /29 | 8075 | natblock |
| 191.232.172.x/24 | /28 | 8075 | natblock |
| 191.232.172.x/24 | /27 | 8075 | natblock |
| 191.232.172.x/24 | /26 | 8075 | natblock |
| 191.232.172.x/24 | /25 | 8075 | natblock |
| 191.232.172.x/24 | /24 | 8075 | natblock |
| 191.232.173.x/24 | /23 | 8075 | natblock |
| 191.232.174.x/24 | /22 | 8075 | natblock |
| 191.232.168.x/24 | /21 | 8075 | natblock |
| 191.232.164.x/24 | /20 | 8075 | natblock |
| 191.232.188.x/24 | /19 | 8075 | natblock |
| 191.232.140.x/24 | /18 | 8075 | natblock |
| 191.232.236.x/24 | /17 | 8075 | natblock |
| 191.232.44.x/24 | /16 | 8075 | natblock |
| 191.233.172.x/24 | /15 | 8075 | natblock |
| 191.234.172.x/24 | /14 | 8075 | natblock |
| 191.236.172.x/24 | /13 | 8075 | natblock |
| 191.224.172.x/24 | /12 | 26615 | natblock |
| 191.248.172.x/24 | /11 | 18881 | natblock |
| 191.200.172.x/24 | /10 | 26599 | natblock |
| 191.168.172.x/24 | /9 | 26615 | natblock |
| 191.104.172.x/24 | /8 | UNROUTED | 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.
