Session Report
Test run at: 2022-09-22 18:20:19 GMTIPv4 AS Route:
Client Prefix (v4): 171.66.12.x/24
Client AS (v4): 32 (STANFORD)
IPv4 Probes: 60
Client Prefix (v6): 2607:f6d0:cxx::/40
Client AS (v6): 32 (STANFORD)
IPv6 Probes: 52
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 /14 none
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.
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 (171.66.12.x/24) can spoof 262143 neighboring addresses (within your /14 prefix)
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 171.66.12.x/24 /31 32 yes 171.66.12.x/24 /30 32 yes 171.66.12.x/24 /29 32 yes 171.66.12.x/24 /28 32 yes 171.66.12.x/24 /27 32 yes 171.66.12.x/24 /26 32 yes 171.66.12.x/24 /25 32 yes 171.66.12.x/24 /24 32 yes 171.66.13.x/24 /23 32 yes 171.66.14.x/24 /22 32 yes 171.66.8.x/24 /21 32 yes 171.66.4.x/24 /20 32 yes 171.66.28.x/24 /19 32 yes 171.66.44.x/24 /18 32 yes 171.66.76.x/24 /17 32 yes 171.66.140.x/24 /16 32 yes 171.67.12.x/24 /15 32 yes 171.64.12.x/24 /14 32 yes 171.70.12.x/24 /13 109 natblock 171.74.12.x/24 /12 19229 natblock 171.82.12.x/24 /11 4134 natblock 171.98.12.x/24 /10 17552 natblock 171.2.12.x/24 /9 UNROUTED natblock 171.194.12.x/24 /8 UNROUTED natblock Meaning of status in Received column:
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 2 IP hop(s).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 2607:f6d0:cxx::/40 /120 32 no 2607:f6d0:cxx::/40 /112 32 no 2607:f6d0:cxx::/40 /104 32 no 2607:f6d0:cxx::/40 /96 32 no 2607:f6d0:cxx::/40 /88 32 no 2607:f6d0:cxx::/40 /80 32 no 2607:f6d0:cxx::/40 /72 32 no 2607:f6d0:cxx::/40 /64 32 no 2607:f6d0:cxx::/40 /56 32 no 2607:f6d0:cxx::/40 /48 32 no 2607:f6d0:cxx::/40 /40 32 no 2607:f6d0:8cxx::/40 /32 32 no 2607:f650:cxx::/40 /24 32869 no 2607:76d0:cxx::/40 /16 UNROUTED no Meaning of status in Received column:
no Packets spoofed from adjacent netblock were not received, probably due to blocking
The results from all tests are aggregated to produce a summary "State of IP Spoofing" report.Feedback:
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