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: 2024-03-12 01:02:41 GMT
Client Prefix (v4): 186.249.217.x/24
Client AS (v4): 263569
IPv4 Probes: 66
Client Prefix (v6): 2804:f30:40xx::/40
Client AS (v6): 263569
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 blocked

Largest spoofable neighbor prefix length none /72

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	/72

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

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

186.249.217.x/24 /31 263569 rewritten

186.249.217.x/24 /30 263569 natblock

186.249.217.x/24 /29 263569 rewritten

186.249.217.x/24 /28 263569 rewritten

186.249.217.x/24 /27 263569 natblock

186.249.217.x/24 /26 263569 natblock

186.249.217.x/24 /25 263569 natblock

186.249.217.x/24 /24 263569 natblock

186.249.216.x/24 /23 263569 natblock

186.249.219.x/24 /22 263569 natblock

186.249.221.x/24 /21 61892 natblock

186.249.209.x/24 /20 263026 rewritten

186.249.201.x/24 /19 28343 natblock

186.249.249.x/24 /18 263570 natblock

186.249.153.x/24 /17 28649 natblock

186.249.89.x/24 /16 263024 natblock

186.248.217.x/24 /15 23106 natblock

186.251.217.x/24 /14 263005 natblock

186.253.217.x/24 /13 26615 natblock

186.241.217.x/24 /12 7738 natblock

186.233.217.x/24 /11 263085 rewritten

186.217.217.x/24 /10 53166 natblock

186.185.217.x/24 /9 6306 rewritten

186.121.217.x/24 /8 26210 natblock

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
186.249.217.x/24	/31	263569	rewritten
186.249.217.x/24	/30	263569	natblock
186.249.217.x/24	/29	263569	rewritten
186.249.217.x/24	/28	263569	rewritten
186.249.217.x/24	/27	263569	natblock
186.249.217.x/24	/26	263569	natblock
186.249.217.x/24	/25	263569	natblock
186.249.217.x/24	/24	263569	natblock
186.249.216.x/24	/23	263569	natblock
186.249.219.x/24	/22	263569	natblock
186.249.221.x/24	/21	61892	natblock
186.249.209.x/24	/20	263026	rewritten
186.249.201.x/24	/19	28343	natblock
186.249.249.x/24	/18	263570	natblock
186.249.153.x/24	/17	28649	natblock
186.249.89.x/24	/16	263024	natblock
186.248.217.x/24	/15	23106	natblock
186.251.217.x/24	/14	263005	natblock
186.253.217.x/24	/13	26615	natblock
186.241.217.x/24	/12	7738	natblock
186.233.217.x/24	/11	263085	rewritten
186.217.217.x/24	/10	53166	natblock
186.185.217.x/24	/9	6306	rewritten
186.121.217.x/24	/8	26210	natblock

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 2001:638:902:2000:ba27:ebff:fe86:2c51 no
2001:4978:1fb:6400::d2 2001:638:902:2000:ba27:ebff:fe86:2c51 no
2001:49aa:111:aa00::11 2001:638:902:2000:ba27:ebff:fe86:2c51 no
fd11:1111:1111::1111 2001:638:902:2000:ba27:ebff:fe86:2c51 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 2607:8400:2880:4::80df:9d0d no
2001:4978:1fb:6400::d2 2607:8400:2880:4::80df:9d0d no
2001:49aa:111:aa00::11 2607:8400:2880:4::80df:9d0d no
fd11:1111:1111::1111 2607:8400:2880:4::80df:9d0d no
2001:48d0:101:501::159 2607:f278:2:13:da3a:ddff:fe30:ce14 no
2001:4978:1fb:6400::d2 2607:f278:2:13:da3a:ddff:fe30:ce14 no
2001:49aa:111:aa00::11 2607:f278:2:13:da3a:ddff:fe30:ce14 no
fd11:1111:1111::1111 2607:f278:2:13:da3a:ddff:fe30:ce14 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	2001:638:902:2000:ba27:ebff:fe86:2c51	no
2001:4978:1fb:6400::d2	2001:638:902:2000:ba27:ebff:fe86:2c51	no
2001:49aa:111:aa00::11	2001:638:902:2000:ba27:ebff:fe86:2c51	no
fd11:1111:1111::1111	2001:638:902:2000:ba27:ebff:fe86:2c51	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	2607:8400:2880:4::80df:9d0d	no
2001:4978:1fb:6400::d2	2607:8400:2880:4::80df:9d0d	no
2001:49aa:111:aa00::11	2607:8400:2880:4::80df:9d0d	no
fd11:1111:1111::1111	2607:8400:2880:4::80df:9d0d	no
2001:48d0:101:501::159	2607:f278:2:13:da3a:ddff:fe30:ce14	no
2001:4978:1fb:6400::d2	2607:f278:2:13:da3a:ddff:fe30:ce14	no
2001:49aa:111:aa00::11	2607:f278:2:13:da3a:ddff:fe30:ce14	no
fd11:1111:1111::1111	2607:f278:2:13:da3a:ddff:fe30:ce14	no

IPv6 Adjacent Netblock Testing:

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

2804:f30:40xx::/40 /120 263569 sendto
2804:f30:40xx::/40 /112 263569 no

2804:f30:40xx::/40 /104 263569 sendto
2804:f30:40xx::/40 /96 263569 yes

2804:f30:40xx::/40 /88 263569 no

2804:f30:40xx::/40 /80 263569 no

2804:f30:40xx::/40 /72 263569 yes

2804:f30:40xx::/40 /64 263569 sendto
2804:f30:40xx::/40 /56 263569 no

2804:f30:40xx::/40 /48 263569 no

2804:f30:40xx::/40 /40 263569 no

2804:f30:c0xx::/40 /32 263569 no

2804:fb0:40xx::/40 /24 262841 no

2804:8f30:40xx::/40 /16 UNROUTED 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)
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
2804:f30:40xx::/40	/120	263569	sendto
2804:f30:40xx::/40	/112	263569	no
2804:f30:40xx::/40	/104	263569	sendto
2804:f30:40xx::/40	/96	263569	yes
2804:f30:40xx::/40	/88	263569	no
2804:f30:40xx::/40	/80	263569	no
2804:f30:40xx::/40	/72	263569	yes
2804:f30:40xx::/40	/64	263569	sendto
2804:f30:40xx::/40	/56	263569	no
2804:f30:40xx::/40	/48	263569	no
2804:f30:40xx::/40	/40	263569	no
2804:f30:c0xx::/40	/32	263569	no
2804:fb0:40xx::/40	/24	262841	no
2804:8f30:40xx::/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.

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