Session Report
Test run at: 2017-06-11 16:47:34 GMT
Client Prefix (v4): 81.205.239.x/24
Client AS (v4): 1136 (KPN)
IPv4 Probes: 131
Client Prefix (v6): 2a02:a443:c8xx::/40
Client AS (v6): 1136 (KPN)
IPv6 Probes: 78
Outbound spoofing summary (from the client to our server) Source address type IPv4 IPv6 Private - RFC1918 or ULA rewritten blocked Routable rewritten blocked Largest spoofable neighbor prefix length none /48
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.
IPv4 Adjacent Netblock Testing:
Your host (81.205.239.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 81.205.239.x/24 /31 1136 natblock 81.205.239.x/24 /30 1136 natblock 81.205.239.x/24 /29 1136 natblock 81.205.239.x/24 /28 1136 natblock 81.205.239.x/24 /27 1136 natblock 81.205.239.x/24 /26 1136 natblock 81.205.239.x/24 /25 1136 natblock 81.205.239.x/24 /24 1136 natblock 81.205.238.x/24 /23 1136 natblock 81.205.237.x/24 /22 1136 natblock 81.205.235.x/24 /21 1136 natblock 81.205.231.x/24 /20 1136 natblock 81.205.255.x/24 /19 1136 natblock 81.205.207.x/24 /18 1136 natblock 81.205.175.x/24 /17 1136 natblock 81.205.111.x/24 /16 1136 natblock 81.204.239.x/24 /15 1136 natblock 81.207.239.x/24 /14 1136 natblock 81.201.239.x/24 /13 12923 natblock 81.197.239.x/24 /12 719 natblock 81.221.239.x/24 /11 1836 natblock 81.237.239.x/24 /10 3301 natblock 81.141.239.x/24 /9 2856 natblock 81.77.239.x/24 /8 5388 natblock 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.
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 probes:
IPv6 Adjacent Netblock Testing:
Spoofed source address Destination Received 2001:4978:1fb:6400::d2 2001:388:1:5001:21c:c0ff:fea2:4a3a no 2001:49aa:111:aa00::11 2001:388:1:5001:21c:c0ff:fea2:4a3a no fd11:1111:1111::1111 2001:388:1:5001:21c:c0ff:fea2:4a3a no 2001:4978:1fb:6400::d2 2001:410:102:1::78 no 2001:49aa:111:aa00::11 2001:410:102:1::78 no fd11:1111:1111::1111 2001:410:102:1::78 no 2001:4978:1fb:6400::d2 2001:410:90ff::5 no 2001:49aa:111:aa00::11 2001:410:90ff::5 no fd11:1111:1111::1111 2001:410:90ff::5 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 2001:4978:1fb: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 2001:4978:1fb: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 2001:4978:1fb: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 2001:4978:1fb:6400::d2 2001:708:40:2001:21c:c0ff:fea2:4c5c no 2001:49aa:111:aa00::11 2001:708:40:2001:21c:c0ff:fea2:4c5c no fd11:1111:1111::1111 2001:708:40:2001:21c:c0ff:fea2:4c5c no
Summary:
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 2a02:a443:c8xx::/40 /120 1136 yes 2a02:a443:c8xx::/40 /112 1136 yes 2a02:a443:c8xx::/40 /104 1136 yes 2a02:a443:c8xx::/40 /96 1136 yes 2a02:a443:c8xx::/40 /88 1136 yes 2a02:a443:c8xx::/40 /80 1136 yes 2a02:a443:c8xx::/40 /72 1136 yes 2a02:a443:c8xx::/40 /64 1136 yes 2a02:a443:c8xx::/40 /56 1136 yes 2a02:a443:c8xx::/40 /48 1136 yes 2a02:a443:c8xx::/40 /40 1136 no 2a02:a443:48xx::/40 /32 1136 no 2a02:a4c3:c8xx::/40 /24 UNROUTED no 2a02:2443:c8xx::/40 /16 UNROUTED 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)
The results from all tests are aggregated to produce a summary "State of IP Spoofing" report.Feedback:
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