Session Report
Summary:
Test run at: 2020-08-24 14:40:26 GMT
Client Prefix (v4): 31.216.55.x/24
Client AS (v4): 20860 (IOMART-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 |
/24 |
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 (31.216.55.x/24) can spoof 255 neighboring addresses (within your /24 prefix)
Spoofed source address (anon) | Prefix Length | ASN of spoofed source address | Received |
31.216.55.x/24 | /31 | 20860 | natblock |
31.216.55.x/24 | /30 | 20860 | natblock |
31.216.55.x/24 | /29 | 20860 | natblock |
31.216.55.x/24 | /28 | 20860 | yes |
31.216.55.x/24 | /27 | 20860 | natblock |
31.216.55.x/24 | /26 | 20860 | yes |
31.216.55.x/24 | /25 | 20860 | yes |
31.216.55.x/24 | /24 | 20860 | yes |
31.216.54.x/24 | /23 | 20860 | natblock |
31.216.53.x/24 | /22 | 20860 | natblock |
31.216.51.x/24 | /21 | 20860 | natblock |
31.216.63.x/24 | /20 | UNROUTED | natblock |
31.216.39.x/24 | /19 | 197308 | natblock |
31.216.23.x/24 | /18 | 49463 | natblock |
31.216.119.x/24 | /17 | 15805 | natblock |
31.216.183.x/24 | /16 | 196660 | natblock |
31.217.55.x/24 | /15 | 5391 | natblock |
31.218.55.x/24 | /14 | 5384 | natblock |
31.220.55.x/24 | /13 | 47583 | natblock |
31.208.55.x/24 | /12 | 29518 | natblock |
31.200.55.x/24 | /11 | 12978 | natblock |
31.248.55.x/24 | /10 | 3320 | natblock |
31.152.55.x/24 | /9 | 29247 | natblock |
31.88.55.x/24 | /8 | 12576 | 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.
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