Session Report
Test run at: 2023-05-27 15:11:59 GMTIPv4 AS Route:
Client Prefix (v4): 58.251.166.x/24
Client AS (v4): 17623 (CNCGROUP-SZ)
IPv4 Probes: 60
Client Prefix (v6): 2001:da8:2dxx::/40
Client AS (v6): 138369 (CNGI-SZH-IX-AS-AP)
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 ✔ received Largest spoofable neighbor prefix length /25 /24
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 (58.251.166.x/24) can spoof 127 neighboring addresses (within your /25 prefix)
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 58.251.166.x/24 /31 17623 yes 58.251.166.x/24 /30 17623 yes 58.251.166.x/24 /29 17623 yes 58.251.166.x/24 /28 17623 yes 58.251.166.x/24 /27 17623 yes 58.251.166.x/24 /26 17623 yes 58.251.166.x/24 /25 17623 yes 58.251.166.x/24 /24 17623 natblock 58.251.167.x/24 /23 17623 natblock 58.251.164.x/24 /22 17623 natblock 58.251.162.x/24 /21 17623 natblock 58.251.174.x/24 /20 17623 natblock 58.251.182.x/24 /19 17623 natblock 58.251.134.x/24 /18 17623 natblock 58.251.230.x/24 /17 17623 natblock 58.251.38.x/24 /16 17623 natblock 58.250.166.x/24 /15 17623 natblock 58.249.166.x/24 /14 17816 natblock 58.255.166.x/24 /13 17816 natblock 58.243.166.x/24 /12 140726 natblock 58.235.166.x/24 /11 9318 natblock 58.219.166.x/24 /10 4134 natblock 58.187.166.x/24 /9 18403 natblock 58.123.166.x/24 /8 9318 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 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 2001:40b0:7500:280::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 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 2001:610:510:115:192:42:115:98 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 yes 2001:49aa:111:aa00::11 2001:630:212:225:225:90ff:fe0c:45a6 yes 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 no
Summary:
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 2001:da8:2dxx::/40 /120 138369 yes 2001:da8:2dxx::/40 /112 138369 yes 2001:da8:2dxx::/40 /104 138369 yes 2001:da8:2dxx::/40 /96 138369 yes 2001:da8:2dxx::/40 /88 138369 yes 2001:da8:2dxx::/40 /80 138369 yes 2001:da8:2dxx::/40 /72 138369 yes 2001:da8:2dxx::/40 /64 138369 yes 2001:da8:2dxx::/40 /56 138369 yes 2001:da8:2dxx::/40 /48 138369 yes 2001:da8:2dxx::/40 /40 23910 yes 2001:da8:adxx::/40 /32 23910 yes 2001:d28:2dxx::/40 /24 9621 yes 2001:8da8:2dxx::/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)
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.