Test run at: 2023-06-11 13:32:40 GMT
Client Prefix (v4): 203.123.48.x/24
Client AS (v4): 37989 (DCS1-02-AS-AP)
IPv4 Probes: 60
Client Prefix (v6): 2405:fc00:xx::/40
Client AS (v6): 37989 (DCS1-02-AS-AP)
IPv6 Probes: 52
Outbound spoofing summary (from the client to our server) Source address type IPv4 IPv6 Private - RFC1918 or ULA blocked received Routable blocked received Largest spoofable neighbor prefix length /23 /16
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 (203.123.48.x/24) can spoof 511 neighboring addresses (within your /23 prefix)
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 203.123.48.x/24 /31 37989 yes 203.123.48.x/24 /30 37989 yes 203.123.48.x/24 /29 37989 yes 203.123.48.x/24 /28 37989 no 203.123.48.x/24 /27 37989 yes 203.123.48.x/24 /26 37989 no 203.123.48.x/24 /25 37989 no 203.123.48.x/24 /24 37989 yes 203.123.49.x/24 /23 37989 yes 203.123.50.x/24 /22 37989 no 203.123.52.x/24 /21 UNROUTED no 203.123.56.x/24 /20 139460 no 203.123.32.x/24 /19 10029 no 203.123.16.x/24 /18 17547 no 203.123.112.x/24 /17 38195 no 203.123.176.x/24 /16 4637 no 203.122.48.x/24 /15 10029 no 203.121.48.x/24 /14 9930 no 203.127.48.x/24 /13 3758 no 203.115.48.x/24 /12 17904 no 203.107.48.x/24 /11 134963 no 203.91.48.x/24 /10 23842 no 203.59.48.x/24 /9 4739 no 203.251.48.x/24 /8 4766 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 able to spoof routable, non-adjacent source addresses through the first 3 IP hop(s).IPv6 probes:
IPv6 Adjacent Netblock Testing:
Spoofed source address Destination Received 2001:48d0:101:501::159 2001:40b0:7500:280::5458:517a yes 2001:4978:1fb:6400::d2 2001:40b0:7500:280::5458:517a yes 2001:49aa:111:aa00::11 2001:40b0:7500:280::5458:517a yes fd11:1111:1111::1111 2001:40b0:7500:280::5458:517a yes 2001:48d0:101:501::159 2001:48d0:101:501::242 yes 2001:4978:1fb:6400::d2 2001:48d0:101:501::242 yes 2001:49aa:111:aa00::11 2001:48d0:101:501::242 yes fd11:1111:1111::1111 2001:48d0:101:501::242 yes 2001:48d0:101:501::159 2001:48d0:101:501::247 yes 2001:4978:1fb:6400::d2 2001:48d0:101:501::247 yes 2001:49aa:111:aa00::11 2001:48d0:101:501::247 yes fd11:1111:1111::1111 2001:48d0:101:501::247 yes 2001:48d0:101:501::159 2001:610:510:115:192:42:115:98 yes 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 yes 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 yes 2001:4978:1fb:6400::d2 2001:770:1c:7:225:90ff:fe0c:acb4 yes 2001:49aa:111:aa00::11 2001:770:1c:7:225:90ff:fe0c:acb4 yes fd11:1111:1111::1111 2001:770:1c:7:225:90ff:fe0c:acb4 yes
Summary:
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 2405:fc00:xx::/40 /120 37989 yes 2405:fc00:xx::/40 /112 37989 yes 2405:fc00:xx::/40 /104 37989 yes 2405:fc00:xx::/40 /96 37989 yes 2405:fc00:xx::/40 /88 37989 yes 2405:fc00:xx::/40 /80 37989 yes 2405:fc00:xx::/40 /72 37989 yes 2405:fc00:xx::/40 /64 37989 yes 2405:fc00:xx::/40 /56 37989 yes 2405:fc00:xx::/40 /48 37989 yes 2405:fc00:xx::/40 /40 37989 yes 2405:fc00:80xx::/40 /32 37989 yes 2405:fc80:xx::/40 /24 23805 yes 2405:7c00:xx::/40 /16 UNROUTED yes Meaning of status in Received column:
yes Packets spoofed from adjacent netblock were received 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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