Session Report
Summary:
Test run at: 2020-08-27 23:48:20 GMT
Client Prefix (v4): 128.127.104.x/24
Client AS (v4): 51430 (ALTUS)
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 (128.127.104.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) | Prefix Length | ASN of spoofed source address | Received |
128.127.104.x/24 | /31 | 51430 | natblock |
128.127.104.x/24 | /30 | 51430 | natblock |
128.127.104.x/24 | /29 | 51430 | natblock |
128.127.104.x/24 | /28 | 51430 | natblock |
128.127.104.x/24 | /27 | 51430 | natblock |
128.127.104.x/24 | /26 | 51430 | natblock |
128.127.104.x/24 | /25 | 51430 | natblock |
128.127.104.x/24 | /24 | 51430 | natblock |
128.127.105.x/24 | /23 | 51430 | natblock |
128.127.106.x/24 | /22 | 51430 | natblock |
128.127.108.x/24 | /21 | 51430 | natblock |
128.127.96.x/24 | /20 | 25592 | natblock |
128.127.120.x/24 | /19 | UNROUTED | natblock |
128.127.72.x/24 | /18 | 198129 | natblock |
128.127.40.x/24 | /17 | 12871 | natblock |
128.127.232.x/24 | /16 | UNROUTED | natblock |
128.126.104.x/24 | /15 | UNROUTED | natblock |
128.125.104.x/24 | /14 | 47 | natblock |
128.123.104.x/24 | /13 | 40246 | natblock |
128.119.104.x/24 | /12 | 1249 | natblock |
128.111.104.x/24 | /11 | 131 | natblock |
128.95.104.x/24 | /10 | 73 | natblock |
128.63.104.x/24 | /9 | 13 | natblock |
128.255.104.x/24 | /8 | 3676 | 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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