Session Report
Test run at: 2021-12-03 03:13:29 GMT
Client Prefix (v4): 103.251.99.x/24
Client AS (v4): 4837 (CHINA169-Backbone)
IPv4 Probes: 66
Client Prefix (v6): 2408:845c:1xx::/40
Client AS (v6): 4837 (CHINA169-Backbone)
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 /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.
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.
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 (103.251.99.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 103.251.99.x/24 /31 4837 rewritten 103.251.99.x/24 /30 4837 rewritten 103.251.99.x/24 /29 4837 rewritten 103.251.99.x/24 /28 4837 rewritten 103.251.99.x/24 /27 4837 rewritten 103.251.99.x/24 /26 4837 rewritten 103.251.99.x/24 /25 4837 rewritten 103.251.99.x/24 /24 4837 rewritten 103.251.98.x/24 /23 4837 rewritten 103.251.97.x/24 /22 4837 rewritten 103.251.103.x/24 /21 132943 rewritten 103.251.107.x/24 /20 4766 rewritten 103.251.115.x/24 /19 UNROUTED rewritten 103.251.67.x/24 /18 22363 rewritten 103.251.35.x/24 /17 17816 rewritten 103.251.227.x/24 /16 45916 rewritten 103.250.99.x/24 /15 UNROUTED rewritten 103.249.99.x/24 /14 45815 rewritten 103.255.99.x/24 /13 UNROUTED rewritten 103.243.99.x/24 /12 133187 rewritten 103.235.99.x/24 /11 UNROUTED rewritten 103.219.99.x/24 /10 UNROUTED rewritten 103.187.99.x/24 /9 UNROUTED rewritten 103.123.99.x/24 /8 138074 rewritten Meaning of status in Received column:
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.
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:
IPv6 Adjacent Netblock Testing:
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
Summary:
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 2408:845c:1xx::/40 /120 4837 yes 2408:845c:1xx::/40 /112 4837 yes 2408:845c:1xx::/40 /104 4837 yes 2408:845c:1xx::/40 /96 4837 yes 2408:845c:1xx::/40 /88 4837 yes 2408:845c:1xx::/40 /80 4837 yes 2408:845c:1xx::/40 /72 4837 yes 2408:845c:1xx::/40 /64 4837 yes 2408:845c:1xx::/40 /56 4837 no 2408:845c:1xx::/40 /48 4837 no 2408:845c:1xx::/40 /40 4837 no 2408:845c:81xx::/40 /32 4837 no 2408:84dc:1xx::/40 /24 UNROUTED no 2408:45c:1xx::/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)
The results from all tests are aggregated to produce a summary "State of IP Spoofing" report.Feedback:
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