Session Report
Summary:
Test run at: 2020-10-09 00:13:42 GMT
Client Prefix (v4): 139.5.177.x/24
Client AS (v4): 55720 (GIGABIT-MY)
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 (139.5.177.x/24) can spoof 0 neighboring addresses
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 139.5.177.x/24 | /31 | 55720 | natblock |
| 139.5.177.x/24 | /30 | 55720 | natblock |
| 139.5.177.x/24 | /29 | 55720 | natblock |
| 139.5.177.x/24 | /28 | 55720 | natblock |
| 139.5.177.x/24 | /27 | 55720 | natblock |
| 139.5.177.x/24 | /26 | 55720 | natblock |
| 139.5.177.x/24 | /25 | 55720 | natblock |
| 139.5.177.x/24 | /24 | 55720 | natblock |
| 139.5.176.x/24 | /23 | 133448 | natblock |
| 139.5.179.x/24 | /22 | 55720 | natblock |
| 139.5.181.x/24 | /21 | 26658 | natblock |
| 139.5.185.x/24 | /20 | 55303 | natblock |
| 139.5.161.x/24 | /19 | UNROUTED | natblock |
| 139.5.145.x/24 | /18 | 45328 | natblock |
| 139.5.241.x/24 | /17 | 133982 | natblock |
| 139.5.49.x/24 | /16 | 134000 | natblock |
| 139.4.177.x/24 | /15 | 702 | natblock |
| 139.7.177.x/24 | /14 | 3209 | natblock |
| 139.1.177.x/24 | /13 | UNROUTED | natblock |
| 139.13.177.x/24 | /12 | 680 | natblock |
| 139.21.177.x/24 | /11 | UNROUTED | natblock |
| 139.37.177.x/24 | /10 | UNROUTED | natblock |
| 139.69.177.x/24 | /9 | 3549 | natblock |
| 139.133.177.x/24 | /8 | 786 | 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.
