Session Report

Summary:

Test run at: 2017-06-16 03:09:59 GMT
Client Prefix (v4): 174.51.21.x/24
Client AS (v4): 7922 (COMCAST-7922)
Client Prefix (v6): 2601:282:40xx::/40
Client AS (v6): 7922 (COMCAST-7922)
IPv6 Probes: 77

Outbound spoofing summary (from the client to our server)
Source address type	IPv6
Private - ULA	blocked
Routable	blocked
Largest spoofable neighbor prefix length	/64

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.

IPv6 probes:

Spoofed source address	Destination	Received

IPv6 Adjacent Netblock Testing:

Spoofed source address (anon)	Prefix Length	ASN of spoofed source address	Received
2601:282:40xx::/40	/120	7922	yes
2601:282:40xx::/40	/112	7922	yes
2601:282:40xx::/40	/104	7922	yes
2601:282:40xx::/40	/96	7922	yes
2601:282:40xx::/40	/88	7922	yes
2601:282:40xx::/40	/80	7922	yes
2601:282:40xx::/40	/72	7922	yes
2601:282:40xx::/40	/64	7922	yes
2601:282:40xx::/40	/56	7922	natblock
2601:282:40xx::/40	/48	7922	natblock
2601:282:40xx::/40	/40	7922	natblock
2601:282:c0xx::/40	/32	7922	natblock
2601:202:40xx::/40	/24	7922	natblock
2601:8282:40xx::/40	/16	UNROUTED	natblock

Meaning of status in Received column:

yes	Packets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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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