Session Report

Summary:

Test run at: 2026-01-12 09:08:57 GMT
Client Prefix (v4): 103.180.240.x/24
Client AS (v4): 139922 (SMNPL-AS-AP)
IPv4 Probes: 162

Outbound spoofing summary (from the client to our server)
Source address type	IPv4
Private - RFC1918	✔	blocked
Routable	✔	blocked
Largest spoofable neighbor prefix length	/24

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 (103.180.240.x/24) can spoof 255 neighboring addresses (within your /24 prefix)

Spoofed source address (anon)	Prefix Length	ASN of spoofed source address	Received
103.180.240.x/24	/31	139922	no
103.180.240.x/24	/30	139922	yes
103.180.240.x/24	/29	139922	yes
103.180.240.x/24	/28	139922	yes
103.180.240.x/24	/27	139922	yes
103.180.240.x/24	/26	139922	yes
103.180.240.x/24	/25	139922	yes
103.180.240.x/24	/24	139922	yes
103.180.241.x/24	/23	139922	no
103.180.242.x/24	/22	139820	no
103.180.244.x/24	/21	134732	no
103.180.248.x/24	/20	149372	no
103.180.224.x/24	/19	UNROUTED	no
103.180.208.x/24	/18	UNROUTED	no
103.180.176.x/24	/17	151734	no
103.180.112.x/24	/16	149474	no
103.181.240.x/24	/15	16509	no
103.182.240.x/24	/14	17995	no
103.176.240.x/24	/13	55352	no
103.188.240.x/24	/12	UNROUTED	no
103.164.240.x/24	/11	134932	no
103.148.240.x/24	/10	132906	no
103.244.240.x/24	/9	45804	no
103.52.240.x/24	/8	UNROUTED	no

Meaning of status in Received column:

no	Packets spoofed from adjacent netblock were not received, probably due to blocking
yes	Packets spoofed from adjacent netblock were received (but that netblock is within the source AS)

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:

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