Session Report
Summary:
Test run at: 2020-10-23 03:59:49 GMT
Client Prefix (v4): 5.187.21.x/24
Client AS (v4): 20860 (IOMART-AS)
IPv4 Probes: 75
Client Prefix (v6): 2a02:8c8:cxx::/40
Client AS (v6): 20860 (IOMART-AS)
IPv6 Probes: 68
Outbound spoofing summary (from the client to our server) |
Source address type |
IPv4 | IPv6 |
Private -
RFC1918 or ULA |
blocked | blocked |
Routable |
blocked | blocked |
Largest spoofable neighbor prefix length |
none | 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 (5.187.21.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) | Prefix Length | ASN of spoofed source address | Received |
5.187.21.x/24 | /31 | 20860 | natblock |
5.187.21.x/24 | /30 | 20860 | natblock |
5.187.21.x/24 | /29 | 20860 | natblock |
5.187.21.x/24 | /28 | 20860 | natblock |
5.187.21.x/24 | /27 | 20860 | natblock |
5.187.21.x/24 | /26 | 20860 | natblock |
5.187.21.x/24 | /25 | 20860 | natblock |
5.187.21.x/24 | /24 | 20860 | natblock |
5.187.20.x/24 | /23 | 20860 | natblock |
5.187.23.x/24 | /22 | 20860 | natblock |
5.187.17.x/24 | /21 | 43082 | natblock |
5.187.29.x/24 | /20 | 20860 | natblock |
5.187.5.x/24 | /19 | 44066 | natblock |
5.187.53.x/24 | /18 | 197155 | natblock |
5.187.85.x/24 | /17 | UNROUTED | natblock |
5.187.149.x/24 | /16 | 5483 | natblock |
5.186.21.x/24 | /15 | 44869 | natblock |
5.185.21.x/24 | /14 | 5617 | natblock |
5.191.21.x/24 | /13 | 31721 | natblock |
5.179.21.x/24 | /12 | 8605 | natblock |
5.171.21.x/24 | /11 | 16232 | natblock |
5.155.21.x/24 | /10 | 29256 | natblock |
5.251.21.x/24 | /9 | 9198 | natblock |
5.59.21.x/24 | /8 | 48146 | 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.
IPv6 probes:
Spoofed source address | Destination | Received
|
---|
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon) | Prefix Length | ASN of spoofed source address | Received |
2a02:8c8:cxx::/40 | /120 | 20860 | natblock |
2a02:8c8:cxx::/40 | /112 | 20860 | natblock |
2a02:8c8:cxx::/40 | /104 | 20860 | natblock |
2a02:8c8:cxx::/40 | /96 | 20860 | natblock |
2a02:8c8:cxx::/40 | /88 | 20860 | natblock |
2a02:8c8:cxx::/40 | /80 | 20860 | natblock |
2a02:8c8:cxx::/40 | /72 | 20860 | natblock |
2a02:8c8:cxx::/40 | /64 | 20860 | natblock |
2a02:8c8:cxx::/40 | /56 | 20860 | natblock |
2a02:8c8:cxx::/40 | /48 | 20860 | natblock |
2a02:8c8:cxx::/40 | /40 | 20860 | natblock |
2a02:8c8:8cxx::/40 | /32 | 20860 | natblock |
2a02:848:cxx::/40 | /24 | 33868 | natblock |
2a02:88c8:cxx::/40 | /16 | 5089 | 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. |
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.
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