Session Report
Summary:
Test run at: 2017-01-13 07:13:57 GMT
Client Prefix (v4): 81.20.120.x/24
Client AS (v4): 39835 (GoeTel)
IPv4 Probes: 104
| 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 (81.20.120.x/24) can spoof 0 neighboring addresses
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 81.20.120.x/24 | /31 | 39835 | natblock |
| 81.20.120.x/24 | /30 | 39835 | natblock |
| 81.20.120.x/24 | /29 | 39835 | natblock |
| 81.20.120.x/24 | /28 | 39835 | natblock |
| 81.20.120.x/24 | /27 | 39835 | natblock |
| 81.20.120.x/24 | /26 | 39835 | natblock |
| 81.20.120.x/24 | /25 | 39835 | natblock |
| 81.20.120.x/24 | /24 | 39835 | natblock |
| 81.20.121.x/24 | /23 | 39835 | natblock |
| 81.20.122.x/24 | /22 | 39835 | natblock |
| 81.20.124.x/24 | /21 | 39835 | natblock |
| 81.20.112.x/24 | /20 | 39835 | natblock |
| 81.20.104.x/24 | /19 | 24699 | natblock |
| 81.20.88.x/24 | /18 | 25260 | natblock |
| 81.20.56.x/24 | /17 | 39202 | natblock |
| 81.20.248.x/24 | /16 | 42580 | natblock |
| 81.21.120.x/24 | /15 | 35370 | natblock |
| 81.22.120.x/24 | /14 | UNROUTED | natblock |
| 81.16.120.x/24 | /13 | UNROUTED | natblock |
| 81.28.120.x/24 | /12 | 47887 | natblock |
| 81.4.120.x/24 | /11 | 198203 | natblock |
| 81.52.120.x/24 | /10 | UNROUTED | natblock |
| 81.84.120.x/24 | /9 | 2860 | natblock |
| 81.148.120.x/24 | /8 | 2856 | 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
able to spoof routable, non-adjacent source addresses through the
first 1 IP hop(s).
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.
