Session Report

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| Data: Stats Summary Recent Tests Remediation Results by AS Results by Country Results by Provider |

Summary:

Test run at: 2025-08-28 21:54:58 GMT
Client Prefix (v4): 98.7.210.x/24
Client AS (v4): 12271 (TWC-12271-NYC)
IPv4 Probes: 162
Client Prefix (v6): 2603:7000:2bxx::/40
Client AS (v6): 12271 (TWC-12271-NYC)
IPv6 Probes: 180

Outbound spoofing summary (from the client to our server)

Source address type IPv4 IPv6

Private - RFC1918 or ULA rewritten blocked

Routable rewritten blocked

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.

Outbound spoofing summary (from the client to our server)
Source address type	IPv4	IPv6
Private - RFC1918 or ULA	rewritten	blocked
Routable	rewritten	blocked
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 is behind a Network Address Translation (NAT) router or firewall which rewrites the source addresses of the test traffic. To test your provider's network further, you must remove the NAT/firewall/router and connect directly.

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 (98.7.210.x/24) can spoof 0 neighboring addresses

Spoofed source address (anon) Prefix
Length ASN of spoofed
source address Received

98.7.210.x/24 /31 12271 rewritten

98.7.210.x/24 /30 12271 rewritten

98.7.210.x/24 /29 12271 rewritten

98.7.210.x/24 /28 12271 rewritten

98.7.210.x/24 /27 12271 rewritten

98.7.210.x/24 /26 12271 rewritten

98.7.210.x/24 /25 12271 rewritten

98.7.210.x/24 /24 12271 rewritten

98.7.211.x/24 /23 12271 rewritten

98.7.208.x/24 /22 12271 rewritten

98.7.214.x/24 /21 12271 rewritten

98.7.218.x/24 /20 12271 rewritten

98.7.194.x/24 /19 12271 rewritten

98.7.242.x/24 /18 12271 rewritten

98.7.146.x/24 /17 40294 rewritten

98.7.82.x/24 /16 12271 rewritten

98.6.210.x/24 /15 11427 rewritten

98.5.210.x/24 /14 11351 rewritten

98.3.210.x/24 /13 11351 rewritten

98.15.210.x/24 /12 12271 rewritten

98.23.210.x/24 /11 7029 rewritten

98.39.210.x/24 /10 7922 rewritten

98.71.210.x/24 /9 8075 rewritten

98.135.210.x/24 /8 UNROUTED rewritten

Meaning of status in Received column:

rewritten The source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.

Spoofed source address (anon)	Prefix Length	ASN of spoofed source address	Received
98.7.210.x/24	/31	12271	rewritten
98.7.210.x/24	/30	12271	rewritten
98.7.210.x/24	/29	12271	rewritten
98.7.210.x/24	/28	12271	rewritten
98.7.210.x/24	/27	12271	rewritten
98.7.210.x/24	/26	12271	rewritten
98.7.210.x/24	/25	12271	rewritten
98.7.210.x/24	/24	12271	rewritten
98.7.211.x/24	/23	12271	rewritten
98.7.208.x/24	/22	12271	rewritten
98.7.214.x/24	/21	12271	rewritten
98.7.218.x/24	/20	12271	rewritten
98.7.194.x/24	/19	12271	rewritten
98.7.242.x/24	/18	12271	rewritten
98.7.146.x/24	/17	40294	rewritten
98.7.82.x/24	/16	12271	rewritten
98.6.210.x/24	/15	11427	rewritten
98.5.210.x/24	/14	11351	rewritten
98.3.210.x/24	/13	11351	rewritten
98.15.210.x/24	/12	12271	rewritten
98.23.210.x/24	/11	7029	rewritten
98.39.210.x/24	/10	7922	rewritten
98.71.210.x/24	/9	8075	rewritten
98.135.210.x/24	/8	UNROUTED	rewritten

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).

IPv6 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.

IPv6 probes:

Spoofed source address Destination Received
2001:48d0:101:501::159 2001:40b0:7500:280::5458:517a no
2001:4978:1fb:6400::d2 2001:40b0:7500:280::5458:517a no
2001:49aa:111:aa00::11 2001:40b0:7500:280::5458:517a no
fd11:1111:1111::1111 2001:40b0:7500:280::5458:517a no
2001:48d0:101:501::159 2001:48d0:101:501::242 no
2001:4978:1fb:6400::d2 2001:48d0:101:501::242 no
2001:49aa:111:aa00::11 2001:48d0:101:501::242 no
fd11:1111:1111::1111 2001:48d0:101:501::242 no
2001:48d0:101:501::159 2001:48d0:101:501::247 no
2001:4978:1fb:6400::d2 2001:48d0:101:501::247 no
2001:49aa:111:aa00::11 2001:48d0:101:501::247 no
fd11:1111:1111::1111 2001:48d0:101:501::247 no
2001:48d0:101:501::159 2001:770:1c:7:225:90ff:fe0c:acb4 no
2001:4978:1fb:6400::d2 2001:770:1c:7:225:90ff:fe0c:acb4 no
2001:49aa:111:aa00::11 2001:770:1c:7:225:90ff:fe0c:acb4 no
fd11:1111:1111::1111 2001:770:1c:7:225:90ff:fe0c:acb4 no
2001:48d0:101:501::159 2607:8400:2880:4::80df:9d0d no
2001:4978:1fb:6400::d2 2607:8400:2880:4::80df:9d0d no
2001:49aa:111:aa00::11 2607:8400:2880:4::80df:9d0d no
fd11:1111:1111::1111 2607:8400:2880:4::80df:9d0d no
2001:48d0:101:501::159 2607:f278:2:13:da3a:ddff:fe30:ce14 no
2001:4978:1fb:6400::d2 2607:f278:2:13:da3a:ddff:fe30:ce14 no
2001:49aa:111:aa00::11 2607:f278:2:13:da3a:ddff:fe30:ce14 no
fd11:1111:1111::1111 2607:f278:2:13:da3a:ddff:fe30:ce14 no

Spoofed source address	Destination	Received
2001:48d0:101:501::159	2001:40b0:7500:280::5458:517a	no
2001:4978:1fb:6400::d2	2001:40b0:7500:280::5458:517a	no
2001:49aa:111:aa00::11	2001:40b0:7500:280::5458:517a	no
fd11:1111:1111::1111	2001:40b0:7500:280::5458:517a	no
2001:48d0:101:501::159	2001:48d0:101:501::242	no
2001:4978:1fb:6400::d2	2001:48d0:101:501::242	no
2001:49aa:111:aa00::11	2001:48d0:101:501::242	no
fd11:1111:1111::1111	2001:48d0:101:501::242	no
2001:48d0:101:501::159	2001:48d0:101:501::247	no
2001:4978:1fb:6400::d2	2001:48d0:101:501::247	no
2001:49aa:111:aa00::11	2001:48d0:101:501::247	no
fd11:1111:1111::1111	2001:48d0:101:501::247	no
2001:48d0:101:501::159	2001:770:1c:7:225:90ff:fe0c:acb4	no
2001:4978:1fb:6400::d2	2001:770:1c:7:225:90ff:fe0c:acb4	no
2001:49aa:111:aa00::11	2001:770:1c:7:225:90ff:fe0c:acb4	no
fd11:1111:1111::1111	2001:770:1c:7:225:90ff:fe0c:acb4	no
2001:48d0:101:501::159	2607:8400:2880:4::80df:9d0d	no
2001:4978:1fb:6400::d2	2607:8400:2880:4::80df:9d0d	no
2001:49aa:111:aa00::11	2607:8400:2880:4::80df:9d0d	no
fd11:1111:1111::1111	2607:8400:2880:4::80df:9d0d	no
2001:48d0:101:501::159	2607:f278:2:13:da3a:ddff:fe30:ce14	no
2001:4978:1fb:6400::d2	2607:f278:2:13:da3a:ddff:fe30:ce14	no
2001:49aa:111:aa00::11	2607:f278:2:13:da3a:ddff:fe30:ce14	no
fd11:1111:1111::1111	2607:f278:2:13:da3a:ddff:fe30:ce14	no

IPv6 Adjacent Netblock Testing:

Spoofed source address (anon) Prefix
Length ASN of spoofed
source address Received

2603:7000:2bxx::/40 /120 12271 sendto
2603:7000:2bxx::/40 /112 12271 sendto
2603:7000:2bxx::/40 /104 12271 sendto
2603:7000:2bxx::/40 /96 12271 sendto
2603:7000:2bxx::/40 /88 12271 sendto
2603:7000:2bxx::/40 /80 12271 sendto
2603:7000:2bxx::/40 /72 12271 sendto
2603:7000:2bxx::/40 /64 12271 sendto
2603:7000:2bxx::/40 /56 12271 sendto
2603:7000:2bxx::/40 /48 12271 sendto
2603:7000:2bxx::/40 /40 12271 sendto
2603:7000:abxx::/40 /32 12271 sendto
2603:7080:2bxx::/40 /24 11351 sendto
2603:f000:2bxx::/40 /16 UNROUTED sendto

Meaning of status in Received column:

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

Spoofed source address (anon)	Prefix Length	ASN of spoofed source address	Received
2603:7000:2bxx::/40	/120	12271	sendto
2603:7000:2bxx::/40	/112	12271	sendto
2603:7000:2bxx::/40	/104	12271	sendto
2603:7000:2bxx::/40	/96	12271	sendto
2603:7000:2bxx::/40	/88	12271	sendto
2603:7000:2bxx::/40	/80	12271	sendto
2603:7000:2bxx::/40	/72	12271	sendto
2603:7000:2bxx::/40	/64	12271	sendto
2603:7000:2bxx::/40	/56	12271	sendto
2603:7000:2bxx::/40	/48	12271	sendto
2603:7000:2bxx::/40	/40	12271	sendto
2603:7000:abxx::/40	/32	12271	sendto
2603:7080:2bxx::/40	/24	11351	sendto
2603:f000:2bxx::/40	/16	UNROUTED	sendto

Summary:

The results from all tests are aggregated to produce a summary "State of IP Spoofing" report.

Feedback:

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