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: 2020-09-10 11:51:05 GMT
Client Prefix (v4): 131.161.112.x/24
Client AS (v4): 264374
IPv4 Probes: 75
Client Prefix (v6): 2804:1d80:40xx::/40
Client AS (v6): 264374
IPv6 Probes: 68

Outbound spoofing summary (from the client to our server)

Source address type IPv4 IPv6

Private - RFC1918 or ULA rewritten received

Routable rewritten received

Largest spoofable neighbor prefix length /29 /16

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	received
Routable	rewritten	received
Largest spoofable neighbor prefix length	/29	/16

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 (131.161.112.x/24) can spoof 7 neighboring addresses (within your /29 prefix)

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

131.161.112.x/24 /31 264374 yes

131.161.112.x/24 /30 264374 natblock

131.161.112.x/24 /29 264374 yes

131.161.112.x/24 /28 264374 rewritten

131.161.112.x/24 /27 264374 rewritten

131.161.112.x/24 /26 264374 rewritten

131.161.112.x/24 /25 264374 rewritten

131.161.112.x/24 /24 264374 rewritten

131.161.113.x/24 /23 264374 rewritten

131.161.114.x/24 /22 UNROUTED rewritten

131.161.116.x/24 /21 264382 rewritten

131.161.120.x/24 /20 264377 rewritten

131.161.96.x/24 /19 61789 rewritten

131.161.80.x/24 /18 263694 rewritten

131.161.48.x/24 /17 264368 rewritten

131.161.240.x/24 /16 262332 rewritten

131.160.112.x/24 /15 158 rewritten

131.163.112.x/24 /14 6591 rewritten

131.165.112.x/24 /13 6834 rewritten

131.169.112.x/24 /12 1754 rewritten

131.177.112.x/24 /11 1759 rewritten

131.129.112.x/24 /10 4685 rewritten

131.225.112.x/24 /9 3152 rewritten

131.33.112.x/24 /8 721 rewritten

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.
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
131.161.112.x/24	/31	264374	yes
131.161.112.x/24	/30	264374	natblock
131.161.112.x/24	/29	264374	yes
131.161.112.x/24	/28	264374	rewritten
131.161.112.x/24	/27	264374	rewritten
131.161.112.x/24	/26	264374	rewritten
131.161.112.x/24	/25	264374	rewritten
131.161.112.x/24	/24	264374	rewritten
131.161.113.x/24	/23	264374	rewritten
131.161.114.x/24	/22	UNROUTED	rewritten
131.161.116.x/24	/21	264382	rewritten
131.161.120.x/24	/20	264377	rewritten
131.161.96.x/24	/19	61789	rewritten
131.161.80.x/24	/18	263694	rewritten
131.161.48.x/24	/17	264368	rewritten
131.161.240.x/24	/16	262332	rewritten
131.160.112.x/24	/15	158	rewritten
131.163.112.x/24	/14	6591	rewritten
131.165.112.x/24	/13	6834	rewritten
131.169.112.x/24	/12	1754	rewritten
131.177.112.x/24	/11	1759	rewritten
131.129.112.x/24	/10	4685	rewritten
131.225.112.x/24	/9	3152	rewritten
131.33.112.x/24	/8	721	rewritten

IPv4 Outbound Filtering Depth:

The tracefilter test found your host able to spoof routable, non-adjacent source addresses through the first 4 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 yes
2001:4978:1fb:6400::d2 2001:48d0:101:501::242 yes
2001:49aa:111:aa00::11 2001:48d0:101:501::242 yes
fd11:1111:1111::1111 2001:48d0:101:501::242 yes
2001:48d0:101:501::159 2001:48d0:101:501::247 yes
2001:4978:1fb:6400::d2 2001:48d0:101:501::247 yes
2001:49aa:111:aa00::11 2001:48d0:101:501::247 yes
fd11:1111:1111::1111 2001:48d0:101:501::247 yes
2001:48d0:101:501::159 2001:610:510:115:192:42:115:98 yes
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 yes
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 2001:770:18:7:225:90ff:fe0c:acb4 yes
2001:4978:1fb:6400::d2 2001:770:18:7:225:90ff:fe0c:acb4 no
2001:49aa:111:aa00::11 2001:770:18:7:225:90ff:fe0c:acb4 no
fd11:1111:1111::1111 2001:770:18:7:225:90ff:fe0c:acb4 no
2001:48d0:101:501::159 2001:df0:4:800:21c:c0ff:feb2:ad5f yes
2001:4978:1fb:6400::d2 2001:df0:4:800:21c:c0ff:feb2:ad5f no
2001:49aa:111:aa00::11 2001:df0:4:800:21c:c0ff:feb2:ad5f no
fd11:1111:1111::1111 2001:df0:4:800:21c:c0ff:feb2:ad5f no

Spoofed source address	Destination	Received
2001:48d0:101:501::159	2001:48d0:101:501::242	yes
2001:4978:1fb:6400::d2	2001:48d0:101:501::242	yes
2001:49aa:111:aa00::11	2001:48d0:101:501::242	yes
fd11:1111:1111::1111	2001:48d0:101:501::242	yes
2001:48d0:101:501::159	2001:48d0:101:501::247	yes
2001:4978:1fb:6400::d2	2001:48d0:101:501::247	yes
2001:49aa:111:aa00::11	2001:48d0:101:501::247	yes
fd11:1111:1111::1111	2001:48d0:101:501::247	yes
2001:48d0:101:501::159	2001:610:510:115:192:42:115:98	yes
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	yes
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	2001:770:18:7:225:90ff:fe0c:acb4	yes
2001:4978:1fb:6400::d2	2001:770:18:7:225:90ff:fe0c:acb4	no
2001:49aa:111:aa00::11	2001:770:18:7:225:90ff:fe0c:acb4	no
fd11:1111:1111::1111	2001:770:18:7:225:90ff:fe0c:acb4	no
2001:48d0:101:501::159	2001:df0:4:800:21c:c0ff:feb2:ad5f	yes
2001:4978:1fb:6400::d2	2001:df0:4:800:21c:c0ff:feb2:ad5f	no
2001:49aa:111:aa00::11	2001:df0:4:800:21c:c0ff:feb2:ad5f	no
fd11:1111:1111::1111	2001:df0:4:800:21c:c0ff:feb2:ad5f	no

IPv6 Adjacent Netblock Testing:

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

2804:1d80:40xx::/40 /120 264374 yes

2804:1d80:40xx::/40 /112 264374 yes

2804:1d80:40xx::/40 /104 264374 yes

2804:1d80:40xx::/40 /96 264374 yes

2804:1d80:40xx::/40 /88 264374 yes

2804:1d80:40xx::/40 /80 264374 yes

2804:1d80:40xx::/40 /72 264374 yes

2804:1d80:40xx::/40 /64 264374 yes

2804:1d80:40xx::/40 /56 264374 yes

2804:1d80:40xx::/40 /48 264374 yes

2804:1d80:40xx::/40 /40 264374 yes

2804:1d80:c0xx::/40 /32 UNROUTED yes

2804:1d00:40xx::/40 /24 61688 yes

2804:9d80:40xx::/40 /16 UNROUTED yes

Meaning of status in Received column:

yes Packets spoofed from adjacent netblock were received
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
2804:1d80:40xx::/40	/120	264374	yes
2804:1d80:40xx::/40	/112	264374	yes
2804:1d80:40xx::/40	/104	264374	yes
2804:1d80:40xx::/40	/96	264374	yes
2804:1d80:40xx::/40	/88	264374	yes
2804:1d80:40xx::/40	/80	264374	yes
2804:1d80:40xx::/40	/72	264374	yes
2804:1d80:40xx::/40	/64	264374	yes
2804:1d80:40xx::/40	/56	264374	yes
2804:1d80:40xx::/40	/48	264374	yes
2804:1d80:40xx::/40	/40	264374	yes
2804:1d80:c0xx::/40	/32	UNROUTED	yes
2804:1d00:40xx::/40	/24	61688	yes
2804:9d80:40xx::/40	/16	UNROUTED	yes

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.

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.
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.