Session Report
Test run at: 2023-06-08 07:59:51 GMT
Client Prefix (v4): 145.103.249.x/24
Client AS (v4): 1103 (SURFNET-NL)
IPv4 Probes: 60
Client Prefix (v6): 2a04:8400:xx::/40
Client AS (v6): 207176 (OPENFIBER)
IPv6 Probes: 52
Outbound spoofing summary (from the client to our server) Source address type IPv4 IPv6 Private - RFC1918 or ULA rewritten received Routable rewritten received Largest spoofable neighbor prefix length none /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 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 (145.103.249.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 145.103.249.x/24 /31 1103 natblock 145.103.249.x/24 /30 1103 rewritten 145.103.249.x/24 /29 1103 rewritten 145.103.249.x/24 /28 1103 rewritten 145.103.249.x/24 /27 1103 rewritten 145.103.249.x/24 /26 1103 rewritten 145.103.249.x/24 /25 1103 rewritten 145.103.249.x/24 /24 1103 rewritten 145.103.248.x/24 /23 1103 rewritten 145.103.251.x/24 /22 1103 rewritten 145.103.253.x/24 /21 1103 rewritten 145.103.241.x/24 /20 1103 rewritten 145.103.233.x/24 /19 1103 rewritten 145.103.217.x/24 /18 1103 rewritten 145.103.185.x/24 /17 1103 rewritten 145.103.121.x/24 /16 1103 rewritten 145.102.249.x/24 /15 1103 rewritten 145.101.249.x/24 /14 1103 rewritten 145.99.249.x/24 /13 1101 rewritten 145.111.249.x/24 /12 1101 rewritten 145.119.249.x/24 /11 1136 rewritten 145.71.249.x/24 /10 UNROUTED rewritten 145.39.249.x/24 /9 1103 rewritten 145.231.249.x/24 /8 UNROUTED rewritten Meaning of status in Received column:
natblock Spoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address. 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 able to spoof routable, non-adjacent source addresses through the first 1 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 2001:40b0:7500:280::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 no
Summary:
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 2a04:8400:xx::/40 /120 207176 yes 2a04:8400:xx::/40 /112 207176 yes 2a04:8400:xx::/40 /104 207176 yes 2a04:8400:xx::/40 /96 207176 yes 2a04:8400:xx::/40 /88 207176 yes 2a04:8400:xx::/40 /80 207176 yes 2a04:8400:xx::/40 /72 207176 yes 2a04:8400:xx::/40 /64 207176 yes 2a04:8400:xx::/40 /56 207176 yes 2a04:8400:xx::/40 /48 207176 yes 2a04:8400:xx::/40 /40 207176 yes 2a04:8400:80xx::/40 /32 207176 yes 2a04:8480:xx::/40 /24 196714 yes 2a04:400:xx::/40 /16 34254 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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