Session Report
Summary:
Test run at: 2020-08-25 16:40:27 GMT
Client Prefix (v4): 138.219.42.x/24
Client AS (v4): 27823
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 (138.219.42.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) | Prefix Length | ASN of spoofed source address | Received |
138.219.42.x/24 | /31 | 27823 | natblock |
138.219.42.x/24 | /30 | 27823 | natblock |
138.219.42.x/24 | /29 | 27823 | natblock |
138.219.42.x/24 | /28 | 27823 | natblock |
138.219.42.x/24 | /27 | 27823 | natblock |
138.219.42.x/24 | /26 | 27823 | natblock |
138.219.42.x/24 | /25 | 27823 | natblock |
138.219.42.x/24 | /24 | 27823 | natblock |
138.219.43.x/24 | /23 | 27823 | natblock |
138.219.40.x/24 | /22 | 27823 | natblock |
138.219.46.x/24 | /21 | 263939 | natblock |
138.219.34.x/24 | /20 | 263927 | natblock |
138.219.58.x/24 | /19 | 52510 | natblock |
138.219.10.x/24 | /18 | 263813 | natblock |
138.219.106.x/24 | /17 | 263925 | natblock |
138.219.170.x/24 | /16 | 264017 | natblock |
138.218.42.x/24 | /15 | 808 | natblock |
138.217.42.x/24 | /14 | 1221 | natblock |
138.223.42.x/24 | /13 | 3303 | natblock |
138.211.42.x/24 | /12 | UNROUTED | natblock |
138.203.42.x/24 | /11 | 5488 | natblock |
138.251.42.x/24 | /10 | 786 | natblock |
138.155.42.x/24 | /9 | 721 | natblock |
138.91.42.x/24 | /8 | 8075 | 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.
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.
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