Session Report

| Spoofer Project Page Download Client Software FAQ API Notifications |

| Data: Stats Summary Recent Tests Remediation Results by AS Results by Country Results by Provider |

Summary:

Test run at: 2021-08-10 13:55:59 GMT
Client Prefix (v4): 77.171.131.x/24
Client AS (v4): 1136 (KPN)
IPv4 Probes: 66
Client Prefix (v6): 2a02:a45f:bfxx::/40
Client AS (v6): 1136 (KPN)
IPv6 Probes: 56

Outbound spoofing summary (from the client to our server)

Source address type IPv4 IPv6

Private - RFC1918 or ULA blocked unknown

Routable blocked unknown

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	blocked	unknown
Routable	blocked	unknown
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.

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

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

77.171.131.x/24 /31 1136 no

77.171.131.x/24 /30 1136 no

77.171.131.x/24 /29 1136 no

77.171.131.x/24 /28 1136 no

77.171.131.x/24 /27 1136 no

77.171.131.x/24 /26 1136 no

77.171.131.x/24 /25 1136 no

77.171.131.x/24 /24 1136 no

77.171.130.x/24 /23 1136 no

77.171.129.x/24 /22 1136 no

77.171.135.x/24 /21 1136 no

77.171.139.x/24 /20 1136 no

77.171.147.x/24 /19 1136 no

77.171.163.x/24 /18 1136 no

77.171.195.x/24 /17 1136 no

77.171.3.x/24 /16 1136 no

77.170.131.x/24 /15 1136 no

77.169.131.x/24 /14 1136 no

77.175.131.x/24 /13 1136 no

77.163.131.x/24 /12 1136 no

77.187.131.x/24 /11 6805 no

77.139.131.x/24 /10 12849 no

77.235.131.x/24 /9 42334 no

77.43.131.x/24 /8 15640 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
77.171.131.x/24	/31	1136	no
77.171.131.x/24	/30	1136	no
77.171.131.x/24	/29	1136	no
77.171.131.x/24	/28	1136	no
77.171.131.x/24	/27	1136	no
77.171.131.x/24	/26	1136	no
77.171.131.x/24	/25	1136	no
77.171.131.x/24	/24	1136	no
77.171.130.x/24	/23	1136	no
77.171.129.x/24	/22	1136	no
77.171.135.x/24	/21	1136	no
77.171.139.x/24	/20	1136	no
77.171.147.x/24	/19	1136	no
77.171.163.x/24	/18	1136	no
77.171.195.x/24	/17	1136	no
77.171.3.x/24	/16	1136	no
77.170.131.x/24	/15	1136	no
77.169.131.x/24	/14	1136	no
77.175.131.x/24	/13	1136	no
77.163.131.x/24	/12	1136	no
77.187.131.x/24	/11	6805	no
77.139.131.x/24	/10	12849	no
77.235.131.x/24	/9	42334	no
77.43.131.x/24	/8	15640	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 2001:770:1c: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 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	2001:770:1c: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	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

2a02:a45f:bfxx::/40 /120 1136 sendto
2a02:a45f:bfxx::/40 /112 1136 sendto
2a02:a45f:bfxx::/40 /104 1136 sendto
2a02:a45f:bfxx::/40 /96 1136 sendto
2a02:a45f:bfxx::/40 /88 1136 sendto
2a02:a45f:bfxx::/40 /80 1136 sendto
2a02:a45f:bfxx::/40 /72 1136 sendto
2a02:a45f:bfxx::/40 /64 1136 sendto
2a02:a45f:bfxx::/40 /56 1136 sendto
2a02:a45f:bfxx::/40 /48 1136 sendto
2a02:a45f:bfxx::/40 /40 1136 sendto
2a02:a45f:3fxx::/40 /32 1136 sendto
2a02:a4df:bfxx::/40 /24 UNROUTED sendto
2a02:245f:bfxx::/40 /16 UNROUTED sendto

Meaning of status in Received column:

sendto The spoofer client was unable to send spoofed headers due to an operating system restriction.

Spoofed source address (anon)	Prefix Length	ASN of spoofed source address	Received
2a02:a45f:bfxx::/40	/120	1136	sendto
2a02:a45f:bfxx::/40	/112	1136	sendto
2a02:a45f:bfxx::/40	/104	1136	sendto
2a02:a45f:bfxx::/40	/96	1136	sendto
2a02:a45f:bfxx::/40	/88	1136	sendto
2a02:a45f:bfxx::/40	/80	1136	sendto
2a02:a45f:bfxx::/40	/72	1136	sendto
2a02:a45f:bfxx::/40	/64	1136	sendto
2a02:a45f:bfxx::/40	/56	1136	sendto
2a02:a45f:bfxx::/40	/48	1136	sendto
2a02:a45f:bfxx::/40	/40	1136	sendto
2a02:a45f:3fxx::/40	/32	1136	sendto
2a02:a4df:bfxx::/40	/24	UNROUTED	sendto
2a02:245f:bfxx::/40	/16	UNROUTED	sendto

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.