Session Report
Summary:
Test run at: 2020-08-25 15:19:36 GMT
Client Prefix (v4): 194.50.19.x/24
Client AS (v4): 205591 (STEFAN6)
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 (194.50.19.x/24) can spoof 0 neighboring addresses
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 194.50.19.x/24 | /31 | 205591 | natblock |
| 194.50.19.x/24 | /30 | 205591 | natblock |
| 194.50.19.x/24 | /29 | 205591 | natblock |
| 194.50.19.x/24 | /28 | 205591 | natblock |
| 194.50.19.x/24 | /27 | 205591 | natblock |
| 194.50.19.x/24 | /26 | 205591 | natblock |
| 194.50.19.x/24 | /25 | 205591 | natblock |
| 194.50.19.x/24 | /24 | 205591 | natblock |
| 194.50.18.x/24 | /23 | 3214 | natblock |
| 194.50.17.x/24 | /22 | 213052 | natblock |
| 194.50.23.x/24 | /21 | 200382 | natblock |
| 194.50.27.x/24 | /20 | UNROUTED | natblock |
| 194.50.3.x/24 | /19 | UNROUTED | natblock |
| 194.50.51.x/24 | /18 | 15713 | natblock |
| 194.50.83.x/24 | /17 | 15694 | natblock |
| 194.50.147.x/24 | /16 | 51738 | natblock |
| 194.51.19.x/24 | /15 | 3215 | natblock |
| 194.48.19.x/24 | /14 | UNROUTED | natblock |
| 194.54.19.x/24 | /13 | 38923 | natblock |
| 194.58.19.x/24 | /12 | UNROUTED | natblock |
| 194.34.19.x/24 | /11 | UNROUTED | natblock |
| 194.18.19.x/24 | /10 | 3301 | natblock |
| 194.114.19.x/24 | /9 | UNROUTED | natblock |
| 194.178.19.x/24 | /8 | 702 | 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.
