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: 2017-10-21 21:33:04 GMT
Client Prefix (v4): 108.176.149.x/24
Client AS (v4): 12271 (TWC-12271-NYC)
IPv4 Probes: 105
Client Prefix (v6): 2604:2000:b8xx::/40
Client AS (v6): 12271 (TWC-12271-NYC)
IPv6 Probes: 68

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 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	rewritten	blocked
Routable	rewritten	blocked
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.

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

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

108.176.149.x/24 /31 12271 rewritten

108.176.149.x/24 /30 12271 rewritten

108.176.149.x/24 /29 12271 natblock

108.176.149.x/24 /28 12271 natblock

108.176.149.x/24 /27 12271 natblock

108.176.149.x/24 /26 12271 natblock

108.176.149.x/24 /25 12271 natblock

108.176.149.x/24 /24 12271 natblock

108.176.148.x/24 /23 12271 natblock

108.176.151.x/24 /22 12271 natblock

108.176.145.x/24 /21 12271 natblock

108.176.157.x/24 /20 12271 natblock

108.176.133.x/24 /19 12271 natblock

108.176.181.x/24 /18 12271 natblock

108.176.213.x/24 /17 11351 natblock

108.176.21.x/24 /16 12271 natblock

108.177.149.x/24 /15 15003 natblock

108.178.149.x/24 /14 20001 natblock

108.180.149.x/24 /13 852 natblock

108.184.149.x/24 /12 20001 natblock

108.160.149.x/24 /11 26094 natblock

108.144.149.x/24 /10 20057 natblock

108.240.149.x/24 /9 7018 natblock

108.48.149.x/24 /8 701 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
108.176.149.x/24	/31	12271	rewritten
108.176.149.x/24	/30	12271	rewritten
108.176.149.x/24	/29	12271	natblock
108.176.149.x/24	/28	12271	natblock
108.176.149.x/24	/27	12271	natblock
108.176.149.x/24	/26	12271	natblock
108.176.149.x/24	/25	12271	natblock
108.176.149.x/24	/24	12271	natblock
108.176.148.x/24	/23	12271	natblock
108.176.151.x/24	/22	12271	natblock
108.176.145.x/24	/21	12271	natblock
108.176.157.x/24	/20	12271	natblock
108.176.133.x/24	/19	12271	natblock
108.176.181.x/24	/18	12271	natblock
108.176.213.x/24	/17	11351	natblock
108.176.21.x/24	/16	12271	natblock
108.177.149.x/24	/15	15003	natblock
108.178.149.x/24	/14	20001	natblock
108.180.149.x/24	/13	852	natblock
108.184.149.x/24	/12	20001	natblock
108.160.149.x/24	/11	26094	natblock
108.144.149.x/24	/10	20057	natblock
108.240.149.x/24	/9	7018	natblock
108.48.149.x/24	/8	701	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 probes:

Spoofed source address Destination Received
2001:4978:1fb:6400::d2 2001:388:1:5001:21c:c0ff:fea2:4a3a no
2001:49aa:111:aa00::11 2001:388:1:5001:21c:c0ff:fea2:4a3a no
fd11:1111:1111::1111 2001:388:1:5001:21c:c0ff:fea2:4a3a no
2001:4978:1fb:6400::d2 2001:410:102:1::78 no
2001:49aa:111:aa00::11 2001:410:102:1::78 no
fd11:1111:1111::1111 2001:410:102:1::78 no
2001:4978:1fb:6400::d2 2001:410:90ff::5 no
2001:49aa:111:aa00::11 2001:410:90ff::5 no
fd11:1111:1111::1111 2001:410:90ff::5 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
2001:4978:1fb: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
2001:4978:1fb: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
2001:4978:1fb: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
2001:4978:1fb:6400::d2 2001:708:40:2001:21c:c0ff:fea2:4c5c no
2001:49aa:111:aa00::11 2001:708:40:2001:21c:c0ff:fea2:4c5c no
fd11:1111:1111::1111 2001:708:40:2001:21c:c0ff:fea2:4c5c 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

Spoofed source address	Destination	Received
2001:4978:1fb:6400::d2	2001:388:1:5001:21c:c0ff:fea2:4a3a	no
2001:49aa:111:aa00::11	2001:388:1:5001:21c:c0ff:fea2:4a3a	no
fd11:1111:1111::1111	2001:388:1:5001:21c:c0ff:fea2:4a3a	no
2001:4978:1fb:6400::d2	2001:410:102:1::78	no
2001:49aa:111:aa00::11	2001:410:102:1::78	no
fd11:1111:1111::1111	2001:410:102:1::78	no
2001:4978:1fb:6400::d2	2001:410:90ff::5	no
2001:49aa:111:aa00::11	2001:410:90ff::5	no
fd11:1111:1111::1111	2001:410:90ff::5	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
2001:4978:1fb: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
2001:4978:1fb: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
2001:4978:1fb: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
2001:4978:1fb:6400::d2	2001:708:40:2001:21c:c0ff:fea2:4c5c	no
2001:49aa:111:aa00::11	2001:708:40:2001:21c:c0ff:fea2:4c5c	no
fd11:1111:1111::1111	2001:708:40:2001:21c:c0ff:fea2:4c5c	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

IPv6 Adjacent Netblock Testing:

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

2604:2000:b8xx::/40 /120 12271 no

2604:2000:b8xx::/40 /112 12271 no

2604:2000:b8xx::/40 /104 12271 no

2604:2000:b8xx::/40 /96 12271 no

2604:2000:b8xx::/40 /88 12271 no

2604:2000:b8xx::/40 /80 12271 no

2604:2000:b8xx::/40 /72 12271 no

2604:2000:b8xx::/40 /64 12271 no

2604:2000:b8xx::/40 /56 12271 no

2604:2000:b8xx::/40 /48 12271 no

2604:2000:b8xx::/40 /40 12271 no

2604:2000:38xx::/40 /32 12271 no

2604:2080:b8xx::/40 /24 26689 no

2604:a000:b8xx::/40 /16 UNROUTED 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
2604:2000:b8xx::/40	/120	12271	no
2604:2000:b8xx::/40	/112	12271	no
2604:2000:b8xx::/40	/104	12271	no
2604:2000:b8xx::/40	/96	12271	no
2604:2000:b8xx::/40	/88	12271	no
2604:2000:b8xx::/40	/80	12271	no
2604:2000:b8xx::/40	/72	12271	no
2604:2000:b8xx::/40	/64	12271	no
2604:2000:b8xx::/40	/56	12271	no
2604:2000:b8xx::/40	/48	12271	no
2604:2000:b8xx::/40	/40	12271	no
2604:2000:38xx::/40	/32	12271	no
2604:2080:b8xx::/40	/24	26689	no
2604:a000:b8xx::/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.