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: 2024-11-20 10:27:55 GMT
Client Prefix (v4): 58.206.238.x/24
Client AS (v4): 4538 (ERX-CERNET-BKB)
IPv4 Probes: 69
Client Prefix (v6): 2001:da8:2xx::/40
Client AS (v6): 23910 (CNGI-CERNET2-AS-AP)
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 ✔ received

Largest spoofable neighbor prefix length none /32

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	✔	received
Largest spoofable neighbor prefix length	none	/32

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

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

58.206.238.x/24 /31 4538 no

58.206.238.x/24 /30 4538 no

58.206.238.x/24 /29 4538 no

58.206.238.x/24 /28 4538 no

58.206.238.x/24 /27 4538 no

58.206.238.x/24 /26 4538 no

58.206.238.x/24 /25 4538 no

58.206.238.x/24 /24 4538 no

58.206.239.x/24 /23 4538 no

58.206.236.x/24 /22 4538 no

58.206.234.x/24 /21 4538 no

58.206.230.x/24 /20 4538 no

58.206.254.x/24 /19 4538 no

58.206.206.x/24 /18 4538 no

58.206.174.x/24 /17 4538 no

58.206.110.x/24 /16 4538 no

58.207.238.x/24 /15 4538 no

58.204.238.x/24 /14 4538 no

58.202.238.x/24 /13 4538 no

58.198.238.x/24 /12 4538 no

58.222.238.x/24 /11 4134 no

58.238.238.x/24 /10 9318 no

58.142.238.x/24 /9 10036 no

58.78.238.x/24 /8 3786 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
58.206.238.x/24	/31	4538	no
58.206.238.x/24	/30	4538	no
58.206.238.x/24	/29	4538	no
58.206.238.x/24	/28	4538	no
58.206.238.x/24	/27	4538	no
58.206.238.x/24	/26	4538	no
58.206.238.x/24	/25	4538	no
58.206.238.x/24	/24	4538	no
58.206.239.x/24	/23	4538	no
58.206.236.x/24	/22	4538	no
58.206.234.x/24	/21	4538	no
58.206.230.x/24	/20	4538	no
58.206.254.x/24	/19	4538	no
58.206.206.x/24	/18	4538	no
58.206.174.x/24	/17	4538	no
58.206.110.x/24	/16	4538	no
58.207.238.x/24	/15	4538	no
58.204.238.x/24	/14	4538	no
58.202.238.x/24	/13	4538	no
58.198.238.x/24	/12	4538	no
58.222.238.x/24	/11	4134	no
58.238.238.x/24	/10	9318	no
58.142.238.x/24	/9	10036	no
58.78.238.x/24	/8	3786	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 probes:

Spoofed source address Destination Received
2001:48d0:101:501::159 2001:40b0:7500:280::5458:517a no
2001:4978:1fb:6400::d2 2001:40b0:7500:280::5458:517a no
2001:49aa:111:aa00::11 2001:40b0:7500:280::5458:517a no
fd11:1111:1111::1111 2001:40b0:7500:280::5458:517a no
2001:48d0:101:501::159 2001:48d0:101:501::242 yes
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 yes
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 2001:770:1c:7:225:90ff:fe0c:acb4 yes
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 yes
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 yes
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	2001:40b0:7500:280::5458:517a	no
2001:4978:1fb:6400::d2	2001:40b0:7500:280::5458:517a	no
2001:49aa:111:aa00::11	2001:40b0:7500:280::5458:517a	no
fd11:1111:1111::1111	2001:40b0:7500:280::5458:517a	no
2001:48d0:101:501::159	2001:48d0:101:501::242	yes
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	yes
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	2001:770:1c:7:225:90ff:fe0c:acb4	yes
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	yes
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	yes
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

2001:da8:2xx::/40 /120 23910 yes

2001:da8:2xx::/40 /112 23910 yes

2001:da8:2xx::/40 /104 23910 yes

2001:da8:2xx::/40 /96 23910 yes

2001:da8:2xx::/40 /88 23910 yes

2001:da8:2xx::/40 /80 23910 yes

2001:da8:2xx::/40 /72 23910 yes

2001:da8:2xx::/40 /64 23910 yes

2001:da8:2xx::/40 /56 23910 yes

2001:da8:2xx::/40 /48 23910 yes

2001:da8:2xx::/40 /40 4538 yes

2001:da8:82xx::/40 /32 23910 yes

2001:d28:2xx::/40 /24 9621 no

2001:8da8:2xx::/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
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:da8:2xx::/40	/120	23910	yes
2001:da8:2xx::/40	/112	23910	yes
2001:da8:2xx::/40	/104	23910	yes
2001:da8:2xx::/40	/96	23910	yes
2001:da8:2xx::/40	/88	23910	yes
2001:da8:2xx::/40	/80	23910	yes
2001:da8:2xx::/40	/72	23910	yes
2001:da8:2xx::/40	/64	23910	yes
2001:da8:2xx::/40	/56	23910	yes
2001:da8:2xx::/40	/48	23910	yes
2001:da8:2xx::/40	/40	4538	yes
2001:da8:82xx::/40	/32	23910	yes
2001:d28:2xx::/40	/24	9621	no
2001:8da8:2xx::/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
yes	Packets spoofed from adjacent netblock were received (but that netblock is within the source AS)