Session Report
Summary:
Test run at: 2017-07-01 18:39:12 GMT
Client Prefix (v4): 122.43.105.x/24
Client AS (v4): 17858 (POWERVIS-AS-KR)
IPv4 Probes: 117
| Outbound spoofing summary (from the client to our server) |
|---|
| Source address type |
IPv4 |
|---|
| Private -
RFC1918 |
blocked |
| Routable |
blocked |
| Largest spoofable neighbor prefix length |
/22 |
| 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 (122.43.105.x/24) can spoof 1023 neighboring addresses (within your /22 prefix)
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 122.43.105.x/24 | /31 | 17858 | natblock |
| 122.43.105.x/24 | /30 | 17858 | natblock |
| 122.43.105.x/24 | /29 | 17858 | natblock |
| 122.43.105.x/24 | /28 | 17858 | natblock |
| 122.43.105.x/24 | /27 | 17858 | natblock |
| 122.43.105.x/24 | /26 | 17858 | natblock |
| 122.43.105.x/24 | /25 | 17858 | natblock |
| 122.43.105.x/24 | /24 | 17858 | natblock |
| 122.43.104.x/24 | /23 | 17858 | yes |
| 122.43.107.x/24 | /22 | 17858 | yes |
| 122.43.109.x/24 | /21 | 17858 | natblock |
| 122.43.97.x/24 | /20 | 17858 | natblock |
| 122.43.121.x/24 | /19 | 17858 | natblock |
| 122.43.73.x/24 | /18 | 17858 | natblock |
| 122.43.41.x/24 | /17 | 17858 | natblock |
| 122.43.233.x/24 | /16 | 17858 | natblock |
| 122.42.105.x/24 | /15 | 17858 | natblock |
| 122.41.105.x/24 | /14 | 17858 | natblock |
| 122.47.105.x/24 | /13 | 17858 | natblock |
| 122.35.105.x/24 | /12 | 17858 | natblock |
| 122.59.105.x/24 | /11 | 4771 | natblock |
| 122.11.105.x/24 | /10 | UNROUTED | natblock |
| 122.107.105.x/24 | /9 | 4804 | natblock |
| 122.171.105.x/24 | /8 | 24560 | natblock |
Meaning of status in Received column:
| yes | Packets spoofed from adjacent netblock were received (but that netblock is within the source AS) |
| 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:
We welcome questions and feedback to the Spoofer Information Mailing List
and invite users to join the Spoofer
Users Mailing List for discussion and announcements.
