Session Report

Summary:

Test run at: 2017-11-15 05:48:41 GMT
Client Prefix (v4): 31.133.151.x/24
Client AS (v4): 56554 (IETF-MEETING)
IPv4 Probes: 105
Client Prefix (v6): 2001:67c:12xx::/40
Client AS (v6): 56554 (IETF-MEETING)

Outbound spoofing summary (from the client to our server)
Source address type	IPv4
Private - RFC1918	✔	blocked
Routable	✔	blocked
Largest spoofable neighbor prefix length	/26

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 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 (31.133.151.x/24) can spoof 63 neighboring addresses (within your /26 prefix)

Spoofed source address (anon)	Prefix Length	ASN of spoofed source address	Received
31.133.151.x/24	/31	56554	yes
31.133.151.x/24	/30	56554	yes
31.133.151.x/24	/29	56554	yes
31.133.151.x/24	/28	56554	yes
31.133.151.x/24	/27	56554	yes
31.133.151.x/24	/26	56554	yes
31.133.151.x/24	/25	56554	sendto
31.133.151.x/24	/24	56554	sendto
31.133.150.x/24	/23	56554	sendto
31.133.149.x/24	/22	56554	sendto
31.133.147.x/24	/21	56554	sendto
31.133.159.x/24	/20	56554	sendto
31.133.135.x/24	/19	56554	sendto
31.133.183.x/24	/18	56554	sendto
31.133.215.x/24	/17	56786	sendto
31.133.23.x/24	/16	56646	sendto
31.132.151.x/24	/15	42145	sendto
31.135.151.x/24	/14	20539	sendto
31.129.151.x/24	/13	51669	sendto
31.141.151.x/24	/12	UNROUTED	sendto
31.149.151.x/24	/11	1136	sendto
31.165.151.x/24	/10	6730	sendto
31.197.151.x/24	/9	3269	sendto
31.5.151.x/24	/8	6830	sendto

Meaning of status in Received column:

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 1 IP hop(s).

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.