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: 2021-08-18 22:26:06 GMT
Client Prefix (v4): 191.37.139.x/24
Client AS (v4): 263360
IPv4 Probes: 66
Client Prefix (v6): 2804:14f0:10xx::/40
Client AS (v6): 263360
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 received

Largest spoofable neighbor prefix length none /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	blocked
Routable	rewritten	received
Largest spoofable neighbor prefix length	none	/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 (191.37.139.x/24) can spoof 0 neighboring addresses

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

191.37.139.x/24 /31 263360 rewritten

191.37.139.x/24 /30 263360 rewritten

191.37.139.x/24 /29 263360 rewritten

191.37.139.x/24 /28 263360 rewritten

191.37.139.x/24 /27 263360 rewritten

191.37.139.x/24 /26 263360 rewritten

191.37.139.x/24 /25 263360 rewritten

191.37.139.x/24 /24 263360 rewritten

191.37.138.x/24 /23 263360 rewritten

191.37.137.x/24 /22 263360 rewritten

191.37.143.x/24 /21 266387 rewritten

191.37.131.x/24 /20 263359 rewritten

191.37.155.x/24 /19 263362 rewritten

191.37.171.x/24 /18 271023 rewritten

191.37.203.x/24 /17 263371 rewritten

191.37.11.x/24 /16 263348 rewritten

191.36.139.x/24 /15 263335 rewritten

191.39.139.x/24 /14 53037 rewritten

191.33.139.x/24 /13 18881 rewritten

191.45.139.x/24 /12 7738 rewritten

191.53.139.x/24 /11 28202 rewritten

191.5.139.x/24 /10 263536 rewritten

191.101.139.x/24 /9 61317 rewritten

191.165.139.x/24 /8 26615 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
191.37.139.x/24	/31	263360	rewritten
191.37.139.x/24	/30	263360	rewritten
191.37.139.x/24	/29	263360	rewritten
191.37.139.x/24	/28	263360	rewritten
191.37.139.x/24	/27	263360	rewritten
191.37.139.x/24	/26	263360	rewritten
191.37.139.x/24	/25	263360	rewritten
191.37.139.x/24	/24	263360	rewritten
191.37.138.x/24	/23	263360	rewritten
191.37.137.x/24	/22	263360	rewritten
191.37.143.x/24	/21	266387	rewritten
191.37.131.x/24	/20	263359	rewritten
191.37.155.x/24	/19	263362	rewritten
191.37.171.x/24	/18	271023	rewritten
191.37.203.x/24	/17	263371	rewritten
191.37.11.x/24	/16	263348	rewritten
191.36.139.x/24	/15	263335	rewritten
191.39.139.x/24	/14	53037	rewritten
191.33.139.x/24	/13	18881	rewritten
191.45.139.x/24	/12	7738	rewritten
191.53.139.x/24	/11	28202	rewritten
191.5.139.x/24	/10	263536	rewritten
191.101.139.x/24	/9	61317	rewritten
191.165.139.x/24	/8	26615	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 2001:48d0:101:501::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 no
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 no
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 2001:770:1c:7:225:90ff:fe0c:acb4 yes
2001:4978:1fb:6400::d2 2001:770:1c:7:225:90ff:fe0c:acb4 yes
2001:49aa:111:aa00::11 2001:770:1c:7:225:90ff:fe0c:acb4 yes
fd11:1111:1111::1111 2001:770:1c:7:225:90ff:fe0c:acb4 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	no
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	no
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	2001:770:1c:7:225:90ff:fe0c:acb4	yes
2001:4978:1fb:6400::d2	2001:770:1c:7:225:90ff:fe0c:acb4	yes
2001:49aa:111:aa00::11	2001:770:1c:7:225:90ff:fe0c:acb4	yes
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

2804:14f0:10xx::/40 /120 263360 yes

2804:14f0:10xx::/40 /112 263360 yes

2804:14f0:10xx::/40 /104 263360 yes

2804:14f0:10xx::/40 /96 263360 yes

2804:14f0:10xx::/40 /88 263360 yes

2804:14f0:10xx::/40 /80 263360 yes

2804:14f0:10xx::/40 /72 263360 yes

2804:14f0:10xx::/40 /64 263360 yes

2804:14f0:10xx::/40 /56 263360 yes

2804:14f0:10xx::/40 /48 263360 yes

2804:14f0:10xx::/40 /40 263360 yes

2804:14f0:90xx::/40 /32 263360 yes

2804:1470:10xx::/40 /24 UNROUTED yes

2804:94f0:10xx::/40 /16 UNROUTED yes

Meaning of status in Received column:

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
2804:14f0:10xx::/40	/120	263360	yes
2804:14f0:10xx::/40	/112	263360	yes
2804:14f0:10xx::/40	/104	263360	yes
2804:14f0:10xx::/40	/96	263360	yes
2804:14f0:10xx::/40	/88	263360	yes
2804:14f0:10xx::/40	/80	263360	yes
2804:14f0:10xx::/40	/72	263360	yes
2804:14f0:10xx::/40	/64	263360	yes
2804:14f0:10xx::/40	/56	263360	yes
2804:14f0:10xx::/40	/48	263360	yes
2804:14f0:10xx::/40	/40	263360	yes
2804:14f0:90xx::/40	/32	263360	yes
2804:1470:10xx::/40	/24	UNROUTED	yes
2804:94f0:10xx::/40	/16	UNROUTED	yes

Summary:

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

Feedback:

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