Session Report

Summary:

Test run at: 2017-12-03 13:39:05 GMT
Client Prefix (v4): 139.138.222.x/24
Client AS (v4): 35432 (CABLENET-AS)
IPv4 Probes: 102

Outbound spoofing summary (from the client to our server)
Source address type	IPv4
Private - RFC1918	unknown
Routable	received
Largest spoofable neighbor prefix length	/9

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:

• ⚠️ The spoofer client was unable to send spoofed headers due to an operating system restriction.

IPv4 AS Route:

This test run probed the following paths in order to infer your ability to send different spoofed source packets. Each node in the graph corresponds to an autonomous system, i.e. different Internet service providers. NOTE: This graph does NOT show if an AS blocks spoofed packets, only the path taken by received spoofed packets. The IP Path Details are available for this run. If non-spoofed packets weren't received at a destination, the traceroute to that destination is not included in this graph and may even cause a totally empty graph.

IPv4 Adjacent Netblock Testing:

Your host (139.138.222.x/24) can spoof 8388607 neighboring addresses (within your /9 prefix)

Spoofed source address (anon)	Prefix Length	ASN of spoofed source address	Received
139.138.222.x/24	/31	35432	yes
139.138.222.x/24	/30	35432	yes
139.138.222.x/24	/29	35432	yes
139.138.222.x/24	/28	35432	yes
139.138.222.x/24	/27	35432	yes
139.138.222.x/24	/26	35432	yes
139.138.222.x/24	/25	35432	yes
139.138.222.x/24	/24	35432	yes
139.138.223.x/24	/23	35432	yes
139.138.220.x/24	/22	35432	yes
139.138.218.x/24	/21	35432	yes
139.138.214.x/24	/20	35432	yes
139.138.206.x/24	/19	35432	yes
139.138.254.x/24	/18	UNROUTED	sendto
139.138.158.x/24	/17	25956	yes
139.138.94.x/24	/16	30404	yes
139.139.222.x/24	/15	531	yes
139.136.222.x/24	/14	UNROUTED	sendto
139.142.222.x/24	/13	6539	yes
139.130.222.x/24	/12	1221	yes
139.154.222.x/24	/11	UNROUTED	sendto
139.170.222.x/24	/10	4837	yes
139.202.222.x/24	/9	4134	yes
139.10.222.x/24	/8	UNROUTED	sendto

Meaning of status in Received column:

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 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.

Feedback:

We welcome questions and feedback to the Spoofer Information Mailing List and invite users to join the Spoofer Users Mailing List for discussion and announcements.