Session Report
Test run at: 2025-03-09 12:23:03 GMT
Client Prefix (v4): 103.26.27.x/24
Client AS (v4): 150369
IPv4 Probes: 162
Client Prefix (v6): 2401:2d60:xx::/40
Client AS (v6): 150369
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server) Source address type IPv4 IPv6 Private - RFC1918 or ULA ✔ received received Routable received received Largest spoofable neighbor prefix length /9 /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.
Warnings:
- ⚠️ Your host is behind a Network Address Translation (NAT) router or firewall but spoofed packets are still being received without modification. See here for more information.
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 (103.26.27.x/24) can spoof 8388607 neighboring addresses (within your /9 prefix)
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 103.26.27.x/24 /31 150369 yes 103.26.27.x/24 /30 150369 yes 103.26.27.x/24 /29 150369 yes 103.26.27.x/24 /28 150369 yes 103.26.27.x/24 /27 150369 yes 103.26.27.x/24 /26 150369 yes 103.26.27.x/24 /25 150369 yes 103.26.27.x/24 /24 150369 yes 103.26.26.x/24 /23 150369 yes 103.26.25.x/24 /22 7690 yes 103.26.31.x/24 /21 151783 yes 103.26.19.x/24 /20 132255 yes 103.26.11.x/24 /19 20473 yes 103.26.59.x/24 /18 58678 yes 103.26.91.x/24 /17 38894 yes 103.26.155.x/24 /16 10019 yes 103.27.27.x/24 /15 58834 yes 103.24.27.x/24 /14 UNROUTED natblock 103.30.27.x/24 /13 UNROUTED natblock 103.18.27.x/24 /12 23778 yes 103.10.27.x/24 /11 151086 yes 103.58.27.x/24 /10 UNROUTED natblock 103.90.27.x/24 /9 132673 yes 103.154.27.x/24 /8 UNROUTED natblock 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) natblock Spoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.
IPv4 Outbound Filtering Depth:
The tracefilter test found your host able to spoof routable, non-adjacent source addresses through the first 10 IP hop(s).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 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 2001:770:1c: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 no 2001:48d0:101:501::159 2607:8400:2880:4::80df:9d0d yes 2001:4978:1fb:6400::d2 2607:8400:2880:4::80df:9d0d yes 2001:49aa:111:aa00::11 2607:8400:2880:4::80df:9d0d yes 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 yes 2001:49aa:111:aa00::11 2607:f278:2:13:da3a:ddff:fe30:ce14 yes fd11:1111:1111::1111 2607:f278:2:13:da3a:ddff:fe30:ce14 yes
Summary:
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 2401:2d60:xx::/40 /120 150369 yes 2401:2d60:xx::/40 /112 150369 yes 2401:2d60:xx::/40 /104 150369 yes 2401:2d60:xx::/40 /96 150369 yes 2401:2d60:xx::/40 /88 150369 yes 2401:2d60:xx::/40 /80 150369 yes 2401:2d60:xx::/40 /72 150369 yes 2401:2d60:xx::/40 /64 150369 yes 2401:2d60:xx::/40 /56 150369 yes 2401:2d60:xx::/40 /48 150369 yes 2401:2d60:xx::/40 /40 150369 yes 2401:2d60:80xx::/40 /32 150369 yes 2401:2de0:xx::/40 /24 UNROUTED yes 2401:ad60:xx::/40 /16 UNROUTED yes Meaning of status in Received column:
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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