Session Report
Summary:
Test run at: 2020-10-04 15:15:35 GMT
Client Prefix (v4): 193.235.207.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 (193.235.207.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) | Prefix Length | ASN of spoofed source address | Received |
193.235.207.x/24 | /31 | 174 | natblock |
193.235.207.x/24 | /30 | 174 | natblock |
193.235.207.x/24 | /29 | 174 | natblock |
193.235.207.x/24 | /28 | 174 | natblock |
193.235.207.x/24 | /27 | 174 | natblock |
193.235.207.x/24 | /26 | 174 | natblock |
193.235.207.x/24 | /25 | 174 | natblock |
193.235.207.x/24 | /24 | 174 | natblock |
193.235.206.x/24 | /23 | 8403 | natblock |
193.235.205.x/24 | /22 | UNROUTED | natblock |
193.235.203.x/24 | /21 | UNROUTED | natblock |
193.235.199.x/24 | /20 | 56946 | natblock |
193.235.223.x/24 | /19 | 35041 | natblock |
193.235.239.x/24 | /18 | 51747 | natblock |
193.235.143.x/24 | /17 | 2119 | natblock |
193.235.79.x/24 | /16 | 3301 | natblock |
193.234.207.x/24 | /15 | UNROUTED | natblock |
193.233.207.x/24 | /14 | UNROUTED | natblock |
193.239.207.x/24 | /13 | 33951 | natblock |
193.227.207.x/24 | /12 | 12998 | natblock |
193.251.207.x/24 | /11 | UNROUTED | natblock |
193.203.207.x/24 | /10 | 41835 | natblock |
193.171.207.x/24 | /9 | 1853 | natblock |
193.107.207.x/24 | /8 | 50763 | 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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