Session Report
Summary:
Test run at: 2018-09-07 14:39:52 GMT
Client Prefix (v4): 5.189.187.x/24
Client AS (v4): 51167 (CONTABO)
IPv4 Probes: 124
Client Prefix (v6): 2a02:c207:xx::/40
Client AS (v6): 51167 (CONTABO)
IPv6 Probes: 82
| Outbound spoofing summary (from the client to our server) |
|---|
| Source address type |
IPv4 | IPv6 |
|---|
| Private -
RFC1918 or ULA |
blocked | blocked |
| Routable |
received | received |
| Largest spoofable neighbor prefix length |
/8 | /24 |
| 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 (5.189.187.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 5.189.187.x/24 | /31 | 51167 | yes |
| 5.189.187.x/24 | /30 | 51167 | sendto |
| 5.189.187.x/24 | /29 | 51167 | yes |
| 5.189.187.x/24 | /28 | 51167 | yes |
| 5.189.187.x/24 | /27 | 51167 | yes |
| 5.189.187.x/24 | /26 | 51167 | sendto |
| 5.189.187.x/24 | /25 | 51167 | yes |
| 5.189.187.x/24 | /24 | 51167 | yes |
| 5.189.186.x/24 | /23 | 51167 | yes |
| 5.189.185.x/24 | /22 | 51167 | yes |
| 5.189.191.x/24 | /21 | 51167 | yes |
| 5.189.179.x/24 | /20 | 51167 | yes |
| 5.189.171.x/24 | /19 | 51167 | yes |
| 5.189.155.x/24 | /18 | 51167 | yes |
| 5.189.251.x/24 | /17 | 44050 | yes |
| 5.189.59.x/24 | /16 | 12668 | yes |
| 5.188.187.x/24 | /15 | 44050 | yes |
| 5.191.187.x/24 | /14 | 31721 | yes |
| 5.185.187.x/24 | /13 | 5617 | yes |
| 5.181.187.x/24 | /12 | UNROUTED | no |
| 5.173.187.x/24 | /11 | 39603 | yes |
| 5.157.187.x/24 | /10 | 197476 | yes |
| 5.253.187.x/24 | /9 | UNROUTED | no |
| 5.61.187.x/24 | /8 | 58243 | yes |
Meaning of status in Received column:
| no | Packets spoofed from adjacent netblock were not received, probably due to blocking |
| yes | Packets spoofed from adjacent netblock were received |
| yes | Packets spoofed from adjacent netblock were received (but that netblock is within the source AS) |
| sendto | The spoofer client was unable to send spoofed headers due to an operating system restriction. |
IPv4 Outbound Filtering Depth:
The tracefilter test found your host
able to spoof routable, non-adjacent source addresses through the
first 10 IP hop(s).
IPv6 probes:
| Spoofed source address | Destination | Received
|
|---|
| 2001:48d0:101:501:ec4:7aff:fea8:71a8 | 2001:48d0:101:501::242 | yes |
| 2001:4978:1fb:6400::d2 | 2001:48d0:101:501::242 | no |
| 2001:49aa:111:aa00::11 | 2001:48d0:101:501::242 | yes |
| fd11:1111:1111::1111 | 2001:48d0:101:501::242 | no |
IPv6 Adjacent Netblock Testing:
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 2a02:c207:xx::/40 | /120 | 51167 | sendto
|
| 2a02:c207:xx::/40 | /112 | 51167 | yes |
| 2a02:c207:xx::/40 | /104 | 51167 | yes |
| 2a02:c207:xx::/40 | /96 | 51167 | yes |
| 2a02:c207:xx::/40 | /88 | 51167 | yes |
| 2a02:c207:xx::/40 | /80 | 51167 | sendto
|
| 2a02:c207:xx::/40 | /72 | 51167 | yes |
| 2a02:c207:xx::/40 | /64 | 51167 | sendto
|
| 2a02:c207:xx::/40 | /56 | 51167 | yes |
| 2a02:c207:xx::/40 | /48 | 51167 | yes |
| 2a02:c207:xx::/40 | /40 | 51167 | yes |
| 2a02:c207:80xx::/40 | /32 | 51167 | yes |
| 2a02:c287:xx::/40 | /24 | 198725 | yes |
| 2a02:4207:xx::/40 | /16 | UNROUTED | no |
Meaning of status in Received column:
| no | Packets spoofed from adjacent netblock were not received, probably due to blocking |
| yes | Packets spoofed from adjacent netblock were received |
| yes | Packets spoofed from adjacent netblock were received (but that netblock is within the source AS) |
| sendto | The spoofer client was unable to send spoofed headers due to an operating system restriction. |
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.
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