Session Report
Summary:
Test run at: 2020-08-19 21:32:47 GMT
Client Prefix (v4): 141.98.254.x/24
Client AS (v4): 39351 (ESAB-AS)
IPv4 Probes: 75
Client Prefix (v6): 2a03:1b20:xx::/40
Client AS (v6): 39351 (ESAB-AS)
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 (141.98.254.x/24) can spoof 0 neighboring addresses
| Spoofed source address (anon) | Prefix
Length | ASN of spoofed
source address | Received |
|---|
| 141.98.254.x/24 | /31 | 39351 | natblock |
| 141.98.254.x/24 | /30 | 39351 | natblock |
| 141.98.254.x/24 | /29 | 39351 | natblock |
| 141.98.254.x/24 | /28 | 39351 | natblock |
| 141.98.254.x/24 | /27 | 39351 | natblock |
| 141.98.254.x/24 | /26 | 39351 | natblock |
| 141.98.254.x/24 | /25 | 39351 | natblock |
| 141.98.254.x/24 | /24 | 39351 | natblock |
| 141.98.255.x/24 | /23 | 39351 | natblock |
| 141.98.252.x/24 | /22 | 39351 | natblock |
| 141.98.250.x/24 | /21 | 57389 | natblock |
| 141.98.246.x/24 | /20 | 213207 | natblock |
| 141.98.238.x/24 | /19 | 34244 | natblock |
| 141.98.222.x/24 | /18 | 34993 | natblock |
| 141.98.190.x/24 | /17 | 18978 | natblock |
| 141.98.126.x/24 | /16 | 209591 | natblock |
| 141.99.254.x/24 | /15 | 680 | natblock |
| 141.96.254.x/24 | /14 | 25367 | natblock |
| 141.102.254.x/24 | /13 | UNROUTED | natblock |
| 141.106.254.x/24 | /12 | 33503 | natblock |
| 141.114.254.x/24 | /11 | 557 | natblock |
| 141.66.254.x/24 | /10 | 13040 | natblock |
| 141.34.254.x/24 | /9 | 1754 | natblock |
| 141.226.254.x/24 | /8 | 48851 | 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 |
|---|
| 2a03:1b20:xx::/40 | /120 | 39351 | natblock |
| 2a03:1b20:xx::/40 | /112 | 39351 | natblock |
| 2a03:1b20:xx::/40 | /104 | 39351 | natblock |
| 2a03:1b20:xx::/40 | /96 | 39351 | natblock |
| 2a03:1b20:xx::/40 | /88 | 39351 | natblock |
| 2a03:1b20:xx::/40 | /80 | 39351 | natblock |
| 2a03:1b20:xx::/40 | /72 | 39351 | natblock |
| 2a03:1b20:xx::/40 | /64 | 39351 | natblock |
| 2a03:1b20:xx::/40 | /56 | 39351 | natblock |
| 2a03:1b20:xx::/40 | /48 | 39351 | natblock |
| 2a03:1b20:xx::/40 | /40 | UNROUTED | natblock |
| 2a03:1b20:80xx::/40 | /32 | UNROUTED | natblock |
| 2a03:1ba0:xx::/40 | /24 | UNROUTED | natblock |
| 2a03:9b20: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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