Session Report

Summary:

Test run at: 2017-12-24 18:18:36 GMT
Client Prefix (v4): 136.243.106.x/24
Client AS (v4): 24940 (HETZNER-AS)
IPv4 Probes: 102
Client Prefix (v6): 2a01:4f8:1xx::/40
Client AS (v6): 24940 (HETZNER-AS)
IPv6 Probes: 62

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	/26		/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 Adjacent Netblock Testing:

Your host (136.243.106.x/24) can spoof 63 neighboring addresses (within your /26 prefix)

Spoofed source address (anon)	Prefix Length	ASN of spoofed source address	Received
136.243.106.x/24	/31	24940	yes
136.243.106.x/24	/30	24940	yes
136.243.106.x/24	/29	24940	yes
136.243.106.x/24	/28	24940	yes
136.243.106.x/24	/27	24940	yes
136.243.106.x/24	/26	24940	yes
136.243.106.x/24	/25	24940	no
136.243.106.x/24	/24	24940	no
136.243.107.x/24	/23	24940	no
136.243.104.x/24	/22	24940	no
136.243.110.x/24	/21	24940	no
136.243.98.x/24	/20	24940	no
136.243.122.x/24	/19	24940	no
136.243.74.x/24	/18	24940	no
136.243.42.x/24	/17	24940	no
136.243.234.x/24	/16	24940	no
136.242.106.x/24	/15	186	no
136.241.106.x/24	/14	UNROUTED	no
136.247.106.x/24	/13	2025	no
136.251.106.x/24	/12	72	no
136.227.106.x/24	/11	600	no
136.211.106.x/24	/10	UNROUTED	no
136.179.106.x/24	/9	23005	no
136.115.106.x/24	/8	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)

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
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
2a01:4f8:1xx::/40	/120	24940	yes
2a01:4f8:1xx::/40	/112	24940	yes
2a01:4f8:1xx::/40	/104	24940	yes
2a01:4f8:1xx::/40	/96	24940	yes
2a01:4f8:1xx::/40	/88	24940	yes
2a01:4f8:1xx::/40	/80	24940	yes
2a01:4f8:1xx::/40	/72	24940	yes
2a01:4f8:1xx::/40	/64	24940	yes
2a01:4f8:1xx::/40	/56	24940	no
2a01:4f8:1xx::/40	/48	24940	no
2a01:4f8:1xx::/40	/40	24940	no
2a01:4f8:81xx::/40	/32	24940	no
2a01:478:1xx::/40	/24	12552	no
2a01:84f8:1xx::/40	/16	12552	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)

Summary:

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

Feedback:

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