Session Report
Summary:
Test run at: 2020-09-08 18:43:10 GMT
Client Prefix (v4): 87.120.253.x/24
Client AS (v4): 34224 (NETERRA-AS)
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 |
/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 (87.120.253.x/24) can spoof 1023 neighboring addresses (within your /22 prefix)
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 87.120.253.x/24 | /31 | 34224 | yes |
| 87.120.253.x/24 | /30 | 34224 | yes |
| 87.120.253.x/24 | /29 | 34224 | yes |
| 87.120.253.x/24 | /28 | 34224 | yes |
| 87.120.253.x/24 | /27 | 34224 | yes |
| 87.120.253.x/24 | /26 | 34224 | yes |
| 87.120.253.x/24 | /25 | 34224 | yes |
| 87.120.253.x/24 | /24 | 34224 | yes |
| 87.120.252.x/24 | /23 | UNROUTED | natblock |
| 87.120.255.x/24 | /22 | 34224 | yes |
| 87.120.249.x/24 | /21 | 207044 | natblock |
| 87.120.245.x/24 | /20 | 25374 | natblock |
| 87.120.237.x/24 | /19 | UNROUTED | natblock |
| 87.120.221.x/24 | /18 | 43561 | natblock |
| 87.120.189.x/24 | /17 | UNROUTED | natblock |
| 87.120.125.x/24 | /16 | 25206 | natblock |
| 87.121.253.x/24 | /15 | 34224 | natblock |
| 87.122.253.x/24 | /14 | 8881 | natblock |
| 87.124.253.x/24 | /13 | 12430 | natblock |
| 87.112.253.x/24 | /12 | 6871 | natblock |
| 87.104.253.x/24 | /11 | 3292 | natblock |
| 87.88.253.x/24 | /10 | 5410 | natblock |
| 87.56.253.x/24 | /9 | 3292 | natblock |
| 87.248.253.x/24 | /8 | 35807 | 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:
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and invite users to join the Spoofer
Users Mailing List for discussion and announcements.
