Session Report
Summary:
Test run at: 2020-02-20 18:03:43 GMT
Client Prefix (v4): 189.90.111.x/24
Client AS (v4): 28634
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 |
/20 |
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 (189.90.111.x/24) can spoof 4095 neighboring addresses (within your /20 prefix)
Spoofed source address (anon) | Prefix Length | ASN of spoofed source address | Received |
189.90.111.x/24 | /31 | 28634 | yes |
189.90.111.x/24 | /30 | 28634 | yes |
189.90.111.x/24 | /29 | 28634 | yes |
189.90.111.x/24 | /28 | 28634 | natblock |
189.90.111.x/24 | /27 | 28634 | yes |
189.90.111.x/24 | /26 | 28634 | yes |
189.90.111.x/24 | /25 | 28634 | yes |
189.90.111.x/24 | /24 | 28634 | yes |
189.90.110.x/24 | /23 | 28634 | yes |
189.90.109.x/24 | /22 | 28634 | yes |
189.90.107.x/24 | /21 | 28634 | yes |
189.90.103.x/24 | /20 | 28634 | yes |
189.90.127.x/24 | /19 | 262808 | natblock |
189.90.79.x/24 | /18 | 28193 | natblock |
189.90.47.x/24 | /17 | 28191 | natblock |
189.90.239.x/24 | /16 | UNROUTED | natblock |
189.91.111.x/24 | /15 | 262589 | natblock |
189.88.111.x/24 | /14 | 4230 | natblock |
189.94.111.x/24 | /13 | 22085 | natblock |
189.82.111.x/24 | /12 | 7738 | natblock |
189.74.111.x/24 | /11 | 8167 | natblock |
189.122.111.x/24 | /10 | 28573 | natblock |
189.26.111.x/24 | /9 | 18881 | natblock |
189.218.111.x/24 | /8 | 265594 | 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 4 IP hop(s).
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.
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