Session Report
Summary:
Test run at: 2020-09-05 20:55:12 GMT
Client Prefix (v4): 138.204.171.x/24
Client AS (v4): 36351 (SOFTLAYER)
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 (138.204.171.x/24) can spoof 0 neighboring addresses
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 138.204.171.x/24 | /31 | 36351 | natblock |
| 138.204.171.x/24 | /30 | 36351 | natblock |
| 138.204.171.x/24 | /29 | 36351 | natblock |
| 138.204.171.x/24 | /28 | 36351 | natblock |
| 138.204.171.x/24 | /27 | 36351 | natblock |
| 138.204.171.x/24 | /26 | 36351 | natblock |
| 138.204.171.x/24 | /25 | 36351 | natblock |
| 138.204.171.x/24 | /24 | 36351 | natblock |
| 138.204.170.x/24 | /23 | 36351 | natblock |
| 138.204.169.x/24 | /22 | 36351 | natblock |
| 138.204.175.x/24 | /21 | 263911 | natblock |
| 138.204.163.x/24 | /20 | 22927 | natblock |
| 138.204.187.x/24 | /19 | 263907 | natblock |
| 138.204.139.x/24 | /18 | 263899 | natblock |
| 138.204.235.x/24 | /17 | 263917 | natblock |
| 138.204.43.x/24 | /16 | 263756 | natblock |
| 138.205.171.x/24 | /15 | 207730 | natblock |
| 138.206.171.x/24 | /14 | UNROUTED | natblock |
| 138.200.171.x/24 | /13 | UNROUTED | natblock |
| 138.196.171.x/24 | /12 | UNROUTED | natblock |
| 138.220.171.x/24 | /11 | 10497 | natblock |
| 138.236.171.x/24 | /10 | 17234 | natblock |
| 138.140.171.x/24 | /9 | 721 | natblock |
| 138.76.171.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.
