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: 2023-03-21 00:13:05 GMT
Client Prefix (v4): 131.0.124.x/24
Client AS (v4): 271133
IPv4 Probes: 60
Client Prefix (v6): 2804:32b0:31xx::/40
Client AS (v6): 265093
IPv6 Probes: 52

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

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

131.0.124.x/24 /31 271133 rewritten

131.0.124.x/24 /30 271133 rewritten

131.0.124.x/24 /29 271133 natblock

131.0.124.x/24 /28 271133 rewritten

131.0.124.x/24 /27 271133 rewritten

131.0.124.x/24 /26 271133 rewritten

131.0.124.x/24 /25 271133 rewritten

131.0.124.x/24 /24 271133 rewritten

131.0.125.x/24 /23 271133 natblock

131.0.126.x/24 /22 271133 rewritten

131.0.120.x/24 /21 262744 rewritten

131.0.116.x/24 /20 61884 rewritten

131.0.108.x/24 /19 27651 rewritten

131.0.92.x/24 /18 61871 rewritten

131.0.60.x/24 /17 61704 rewritten

131.0.252.x/24 /16 263555 rewritten

131.1.124.x/24 /15 3269 rewritten

131.2.124.x/24 /14 749 natblock

131.4.124.x/24 /13 721 natblock

131.8.124.x/24 /12 749 rewritten

131.16.124.x/24 /11 721 rewritten

131.32.124.x/24 /10 385 rewritten

131.64.124.x/24 /9 27064 rewritten

131.128.124.x/24 /8 14348 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
131.0.124.x/24	/31	271133	rewritten
131.0.124.x/24	/30	271133	rewritten
131.0.124.x/24	/29	271133	natblock
131.0.124.x/24	/28	271133	rewritten
131.0.124.x/24	/27	271133	rewritten
131.0.124.x/24	/26	271133	rewritten
131.0.124.x/24	/25	271133	rewritten
131.0.124.x/24	/24	271133	rewritten
131.0.125.x/24	/23	271133	natblock
131.0.126.x/24	/22	271133	rewritten
131.0.120.x/24	/21	262744	rewritten
131.0.116.x/24	/20	61884	rewritten
131.0.108.x/24	/19	27651	rewritten
131.0.92.x/24	/18	61871	rewritten
131.0.60.x/24	/17	61704	rewritten
131.0.252.x/24	/16	263555	rewritten
131.1.124.x/24	/15	3269	rewritten
131.2.124.x/24	/14	749	natblock
131.4.124.x/24	/13	721	natblock
131.8.124.x/24	/12	749	rewritten
131.16.124.x/24	/11	721	rewritten
131.32.124.x/24	/10	385	rewritten
131.64.124.x/24	/9	27064	rewritten
131.128.124.x/24	/8	14348	rewritten

IPv4 Outbound Filtering Depth:

The tracefilter test found your host unable to spoof routable, non-adjacent source addresses through even the first IP hop.

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 2001:610:510:115:192:42:115:98 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 2001:770:1c: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

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	2001:610:510:115:192:42:115:98	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	2001:770:1c: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

IPv6 Adjacent Netblock Testing:

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

2804:32b0:31xx::/40 /120 265093 no

2804:32b0:31xx::/40 /112 265093 no

2804:32b0:31xx::/40 /104 265093 no

2804:32b0:31xx::/40 /96 265093 no

2804:32b0:31xx::/40 /88 265093 no

2804:32b0:31xx::/40 /80 265093 no

2804:32b0:31xx::/40 /72 265093 no

2804:32b0:31xx::/40 /64 265093 no

2804:32b0:31xx::/40 /56 265093 no

2804:32b0:31xx::/40 /48 265093 no

2804:32b0:31xx::/40 /40 265093 no

2804:32b0:b1xx::/40 /32 265093 no

2804:3230:31xx::/40 /24 265061 no

2804:b2b0:31xx::/40 /16 UNROUTED no

Meaning of status in Received column:

no Packets spoofed from adjacent netblock were not received, probably due to blocking

Spoofed source address (anon)	Prefix Length	ASN of spoofed source address	Received
2804:32b0:31xx::/40	/120	265093	no
2804:32b0:31xx::/40	/112	265093	no
2804:32b0:31xx::/40	/104	265093	no
2804:32b0:31xx::/40	/96	265093	no
2804:32b0:31xx::/40	/88	265093	no
2804:32b0:31xx::/40	/80	265093	no
2804:32b0:31xx::/40	/72	265093	no
2804:32b0:31xx::/40	/64	265093	no
2804:32b0:31xx::/40	/56	265093	no
2804:32b0:31xx::/40	/48	265093	no
2804:32b0:31xx::/40	/40	265093	no
2804:32b0:b1xx::/40	/32	265093	no
2804:3230:31xx::/40	/24	265061	no
2804:b2b0:31xx::/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.