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: 2024-04-27 02:20:09 GMT
Client Prefix (v4): 72.104.248.x/24
Client AS (v4): 6167 (CELLCO-PART)
IPv4 Probes: 66
Client Prefix (v6): 2600:1008:a1xx::/40
Client AS (v6): 6167 (CELLCO-PART)
IPv6 Probes: 56

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 /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.

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	/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.

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

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

72.104.248.x/24 /31 6167 natblock

72.104.248.x/24 /30 6167 natblock

72.104.248.x/24 /29 6167 rewritten

72.104.248.x/24 /28 6167 rewritten

72.104.248.x/24 /27 6167 rewritten

72.104.248.x/24 /26 6167 rewritten

72.104.248.x/24 /25 6167 rewritten

72.104.248.x/24 /24 6167 rewritten

72.104.249.x/24 /23 6167 rewritten

72.104.250.x/24 /22 6167 rewritten

72.104.252.x/24 /21 6167 rewritten

72.104.240.x/24 /20 6167 rewritten

72.104.232.x/24 /19 6167 rewritten

72.104.216.x/24 /18 6167 rewritten

72.104.184.x/24 /17 6167 rewritten

72.104.120.x/24 /16 6167 rewritten

72.105.248.x/24 /15 6167 rewritten

72.106.248.x/24 /14 6167 rewritten

72.108.248.x/24 /13 6167 rewritten

72.96.248.x/24 /12 6167 rewritten

72.120.248.x/24 /11 22394 rewritten

72.72.248.x/24 /10 701 rewritten

72.40.248.x/24 /9 UNROUTED rewritten

72.232.248.x/24 /8 33070 rewritten

Meaning of status in Received column:

natblock Spoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.
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
72.104.248.x/24	/31	6167	natblock
72.104.248.x/24	/30	6167	natblock
72.104.248.x/24	/29	6167	rewritten
72.104.248.x/24	/28	6167	rewritten
72.104.248.x/24	/27	6167	rewritten
72.104.248.x/24	/26	6167	rewritten
72.104.248.x/24	/25	6167	rewritten
72.104.248.x/24	/24	6167	rewritten
72.104.249.x/24	/23	6167	rewritten
72.104.250.x/24	/22	6167	rewritten
72.104.252.x/24	/21	6167	rewritten
72.104.240.x/24	/20	6167	rewritten
72.104.232.x/24	/19	6167	rewritten
72.104.216.x/24	/18	6167	rewritten
72.104.184.x/24	/17	6167	rewritten
72.104.120.x/24	/16	6167	rewritten
72.105.248.x/24	/15	6167	rewritten
72.106.248.x/24	/14	6167	rewritten
72.108.248.x/24	/13	6167	rewritten
72.96.248.x/24	/12	6167	rewritten
72.120.248.x/24	/11	22394	rewritten
72.72.248.x/24	/10	701	rewritten
72.40.248.x/24	/9	UNROUTED	rewritten
72.232.248.x/24	/8	33070	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 2001:48d0:101:501::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 2001:610:510:115:192:42:115:98 no
2001:4978:1fb:6400::d2 2001:610:510:115:192:42:115:98 no
2001:49aa:111:aa00::11 2001:610:510:115:192:42:115:98 no
fd11:1111:1111::1111 2001:610:510:115:192:42:115:98 no
2001:48d0:101:501::159 2001:630:212:225:225:90ff:fe0c:45a6 no
2001:4978:1fb:6400::d2 2001:630:212:225:225:90ff:fe0c:45a6 no
2001:49aa:111:aa00::11 2001:630:212:225:225:90ff:fe0c:45a6 no
fd11:1111:1111::1111 2001:630:212:225:225:90ff:fe0c:45a6 no
2001:48d0:101:501::159 2001:638:902:2000:ba27:ebff:fe86:2c51 no
2001:4978:1fb:6400::d2 2001:638:902:2000:ba27:ebff:fe86:2c51 no
2001:49aa:111:aa00::11 2001:638:902:2000:ba27:ebff:fe86:2c51 no
fd11:1111:1111::1111 2001:638:902:2000:ba27:ebff:fe86:2c51 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	2001:48d0:101:501::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	2001:610:510:115:192:42:115:98	no
2001:4978:1fb:6400::d2	2001:610:510:115:192:42:115:98	no
2001:49aa:111:aa00::11	2001:610:510:115:192:42:115:98	no
fd11:1111:1111::1111	2001:610:510:115:192:42:115:98	no
2001:48d0:101:501::159	2001:630:212:225:225:90ff:fe0c:45a6	no
2001:4978:1fb:6400::d2	2001:630:212:225:225:90ff:fe0c:45a6	no
2001:49aa:111:aa00::11	2001:630:212:225:225:90ff:fe0c:45a6	no
fd11:1111:1111::1111	2001:630:212:225:225:90ff:fe0c:45a6	no
2001:48d0:101:501::159	2001:638:902:2000:ba27:ebff:fe86:2c51	no
2001:4978:1fb:6400::d2	2001:638:902:2000:ba27:ebff:fe86:2c51	no
2001:49aa:111:aa00::11	2001:638:902:2000:ba27:ebff:fe86:2c51	no
fd11:1111:1111::1111	2001:638:902:2000:ba27:ebff:fe86:2c51	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

2600:1008:a1xx::/40 /120 6167 yes

2600:1008:a1xx::/40 /112 6167 yes

2600:1008:a1xx::/40 /104 6167 yes

2600:1008:a1xx::/40 /96 6167 yes

2600:1008:a1xx::/40 /88 6167 yes

2600:1008:a1xx::/40 /80 6167 yes

2600:1008:a1xx::/40 /72 6167 yes

2600:1008:a1xx::/40 /64 6167 yes

2600:1008:a1xx::/40 /56 6167 no

2600:1008:a1xx::/40 /48 6167 no

2600:1008:a1xx::/40 /40 22394 no

2600:1008:21xx::/40 /32 22394 no

2600:1088:a1xx::/40 /24 UNROUTED no

2600:9008:a1xx::/40 /16 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)

Spoofed source address (anon)	Prefix Length	ASN of spoofed source address	Received
2600:1008:a1xx::/40	/120	6167	yes
2600:1008:a1xx::/40	/112	6167	yes
2600:1008:a1xx::/40	/104	6167	yes
2600:1008:a1xx::/40	/96	6167	yes
2600:1008:a1xx::/40	/88	6167	yes
2600:1008:a1xx::/40	/80	6167	yes
2600:1008:a1xx::/40	/72	6167	yes
2600:1008:a1xx::/40	/64	6167	yes
2600:1008:a1xx::/40	/56	6167	no
2600:1008:a1xx::/40	/48	6167	no
2600:1008:a1xx::/40	/40	22394	no
2600:1008:21xx::/40	/32	22394	no
2600:1088:a1xx::/40	/24	UNROUTED	no
2600:9008:a1xx::/40	/16	UNROUTED	no

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.

natblock	Spoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.
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.

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)