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: 2020-12-11 21:39:55 GMT
Client Prefix (v4): 81.187.27.x/24
Client AS (v4): 20712 (AS20712)
IPv4 Probes: 75
Client Prefix (v6): 2001:8b0:11xx::/40
Client AS (v6): 20712 (AS20712)
IPv6 Probes: 68

Outbound spoofing summary (from the client to our server)

Source address type IPv4 IPv6

Private - RFC1918 or ULA blocked blocked

Routable blocked blocked

Largest spoofable neighbor prefix length /27 /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	blocked	blocked
Routable	blocked	blocked
Largest spoofable neighbor prefix length	/27	/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.

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 (81.187.27.x/24) can spoof 31 neighboring addresses (within your /27 prefix)

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

81.187.27.x/24 /31 20712 yes

81.187.27.x/24 /30 20712 yes

81.187.27.x/24 /29 20712 yes

81.187.27.x/24 /28 20712 yes

81.187.27.x/24 /27 20712 yes

81.187.27.x/24 /26 20712 rewritten

81.187.27.x/24 /25 20712 no

81.187.27.x/24 /24 20712 no

81.187.26.x/24 /23 20712 no

81.187.25.x/24 /22 20712 no

81.187.31.x/24 /21 20712 no

81.187.19.x/24 /20 20712 no

81.187.11.x/24 /19 20712 no

81.187.59.x/24 /18 20712 no

81.187.91.x/24 /17 20712 no

81.187.155.x/24 /16 20712 no

81.186.27.x/24 /15 8248 no

81.185.27.x/24 /14 12626 no

81.191.27.x/24 /13 2116 no

81.179.27.x/24 /12 9105 no

81.171.27.x/24 /11 60781 no

81.155.27.x/24 /10 2856 no

81.251.27.x/24 /9 3215 no

81.59.27.x/24 /8 13127 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)
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
81.187.27.x/24	/31	20712	yes
81.187.27.x/24	/30	20712	yes
81.187.27.x/24	/29	20712	yes
81.187.27.x/24	/28	20712	yes
81.187.27.x/24	/27	20712	yes
81.187.27.x/24	/26	20712	rewritten
81.187.27.x/24	/25	20712	no
81.187.27.x/24	/24	20712	no
81.187.26.x/24	/23	20712	no
81.187.25.x/24	/22	20712	no
81.187.31.x/24	/21	20712	no
81.187.19.x/24	/20	20712	no
81.187.11.x/24	/19	20712	no
81.187.59.x/24	/18	20712	no
81.187.91.x/24	/17	20712	no
81.187.155.x/24	/16	20712	no
81.186.27.x/24	/15	8248	no
81.185.27.x/24	/14	12626	no
81.191.27.x/24	/13	2116	no
81.179.27.x/24	/12	9105	no
81.171.27.x/24	/11	60781	no
81.155.27.x/24	/10	2856	no
81.251.27.x/24	/9	3215	no
81.59.27.x/24	/8	13127	no

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 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 2001:770:18:7:225:90ff:fe0c:acb4 no
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 no
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	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	2001:770:18:7:225:90ff:fe0c:acb4	no
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	no
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

2001:8b0:11xx::/40 /120 20712 yes

2001:8b0:11xx::/40 /112 20712 yes

2001:8b0:11xx::/40 /104 20712 yes

2001:8b0:11xx::/40 /96 20712 yes

2001:8b0:11xx::/40 /88 20712 yes

2001:8b0:11xx::/40 /80 20712 yes

2001:8b0:11xx::/40 /72 20712 yes

2001:8b0:11xx::/40 /64 20712 yes

2001:8b0:11xx::/40 /56 20712 no

2001:8b0:11xx::/40 /48 20712 no

2001:8b0:11xx::/40 /40 20712 no

2001:8b0:91xx::/40 /32 20712 no

2001:830:11xx::/40 /24 61157 no

2001:88b0:11xx::/40 /16 1221 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
2001:8b0:11xx::/40	/120	20712	yes
2001:8b0:11xx::/40	/112	20712	yes
2001:8b0:11xx::/40	/104	20712	yes
2001:8b0:11xx::/40	/96	20712	yes
2001:8b0:11xx::/40	/88	20712	yes
2001:8b0:11xx::/40	/80	20712	yes
2001:8b0:11xx::/40	/72	20712	yes
2001:8b0:11xx::/40	/64	20712	yes
2001:8b0:11xx::/40	/56	20712	no
2001:8b0:11xx::/40	/48	20712	no
2001:8b0:11xx::/40	/40	20712	no
2001:8b0:91xx::/40	/32	20712	no
2001:830:11xx::/40	/24	61157	no
2001:88b0:11xx::/40	/16	1221	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.

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)
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.