Session Report
Summary:
Test run at: 2020-06-11 06:10:30 GMT
Client Prefix (v4): 195.144.21.x/24
Client AS (v4): 174 (COGENT-174)
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 |
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 (195.144.21.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) | Prefix Length | ASN of spoofed source address | Received |
195.144.21.x/24 | /31 | 174 | no |
195.144.21.x/24 | /30 | 174 | no |
195.144.21.x/24 | /29 | 174 | no |
195.144.21.x/24 | /28 | 174 | no |
195.144.21.x/24 | /27 | 174 | no |
195.144.21.x/24 | /26 | 174 | no |
195.144.21.x/24 | /25 | 174 | no |
195.144.21.x/24 | /24 | 174 | no |
195.144.20.x/24 | /23 | 12301 | no |
195.144.23.x/24 | /22 | 197883 | no |
195.144.17.x/24 | /21 | 35414 | no |
195.144.29.x/24 | /20 | 38954 | no |
195.144.5.x/24 | /19 | 702 | no |
195.144.53.x/24 | /18 | 3303 | no |
195.144.85.x/24 | /17 | 8201 | no |
195.144.149.x/24 | /16 | UNROUTED | no |
195.145.21.x/24 | /15 | 3320 | no |
195.146.21.x/24 | /14 | 6663 | no |
195.148.21.x/24 | /13 | 1741 | no |
195.152.21.x/24 | /12 | 1290 | no |
195.128.21.x/24 | /11 | 61157 | no |
195.176.21.x/24 | /10 | 559 | no |
195.208.21.x/24 | /9 | UNROUTED | no |
195.16.21.x/24 | /8 | 6848 | no |
Meaning of status in Received column:
no | Packets spoofed from adjacent netblock were not received, probably due to blocking |
IPv4 Outbound Filtering Depth:
The tracefilter test found your host
unable to spoof routable, non-adjacent source addresses through
even the first IP hop.
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.
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