Session Report
Summary:
Test run at: 2020-08-19 20:58:11 GMT
Client Prefix (v4): 172.83.40.x/24
Client AS (v4): 46562 (PERFORMIVE)
IPv4 Probes: 75
Client Prefix (v6): 2607:f7a0:xx::/40
Client AS (v6): 46562 (PERFORMIVE)
IPv6 Probes: 68
| Outbound spoofing summary (from the client to our server) |
|---|
| Source address type |
IPv4 | IPv6 |
|---|
| Private -
RFC1918 or ULA |
unknown | unknown |
| Routable |
unknown | unknown |
| Largest spoofable neighbor prefix length |
none | 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. |
Warnings:
- ⚠️ Your host was unable to source even non-spoofed IPv4 UDP traffic to our servers. A firewall, router or other middlebox is preventing our testing. To test your provider's network further, you must remove the firewall or router and connect directly.
- ⚠️ Your host was unable to source even non-spoofed IPv6 UDP traffic to our servers. A firewall, router or other middlebox is preventing our testing. To test your provider's network further, you must remove the firewall or router and connect directly.
IPv4 Adjacent Netblock Testing:
Your host (172.83.40.x/24) can spoof 0 neighboring addresses
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 172.83.40.x/24 | /31 | 46562 | natblock |
| 172.83.40.x/24 | /30 | 46562 | natblock |
| 172.83.40.x/24 | /29 | 46562 | natblock |
| 172.83.40.x/24 | /28 | 46562 | natblock |
| 172.83.40.x/24 | /27 | 46562 | natblock |
| 172.83.40.x/24 | /26 | 46562 | natblock |
| 172.83.40.x/24 | /25 | 46562 | natblock |
| 172.83.40.x/24 | /24 | 46562 | natblock |
| 172.83.41.x/24 | /23 | 46562 | natblock |
| 172.83.42.x/24 | /22 | 46562 | natblock |
| 172.83.44.x/24 | /21 | 46562 | natblock |
| 172.83.32.x/24 | /20 | 62917 | natblock |
| 172.83.56.x/24 | /19 | 6327 | natblock |
| 172.83.8.x/24 | /18 | 394996 | natblock |
| 172.83.104.x/24 | /17 | 395309 | natblock |
| 172.83.168.x/24 | /16 | 397168 | natblock |
| 172.82.40.x/24 | /15 | UNROUTED | natblock |
| 172.81.40.x/24 | /14 | UNROUTED | natblock |
| 172.87.40.x/24 | /13 | 40386 | natblock |
| 172.91.40.x/24 | /12 | 20001 | natblock |
| 172.67.40.x/24 | /11 | 13335 | natblock |
| 172.115.40.x/24 | /10 | 20001 | natblock |
| 172.19.40.x/24 | /9 | UNROUTED | natblock |
| 172.211.40.x/24 | /8 | UNROUTED | 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.
IPv6 Adjacent Netblock Testing:
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 2607:f7a0:xx::/40 | /120 | 46562 | natblock |
| 2607:f7a0:xx::/40 | /112 | 46562 | natblock |
| 2607:f7a0:xx::/40 | /104 | 46562 | natblock |
| 2607:f7a0:xx::/40 | /96 | 46562 | natblock |
| 2607:f7a0:xx::/40 | /88 | 46562 | natblock |
| 2607:f7a0:xx::/40 | /80 | 46562 | natblock |
| 2607:f7a0:xx::/40 | /72 | 46562 | natblock |
| 2607:f7a0:xx::/40 | /64 | 46562 | natblock |
| 2607:f7a0:xx::/40 | /56 | 46562 | natblock |
| 2607:f7a0:xx::/40 | /48 | 46562 | natblock |
| 2607:f7a0:xx::/40 | /40 | UNROUTED | natblock |
| 2607:f7a0:80xx::/40 | /32 | UNROUTED | natblock |
| 2607:f720:xx::/40 | /24 | 7377 | natblock |
| 2607:77a0:xx::/40 | /16 | UNROUTED | 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. |
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.
Feedback:
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and invite users to join the Spoofer
Users Mailing List for discussion and announcements.
