Session Report
Test run at: 2017-03-27 00:20:36 GMT
Client Prefix (v4): 87.122.4.x/24
Client AS (v4): 8881 (VERSATEL)
IPv4 Probes: 104
Client Prefix (v6): 2001:16b8:6xx::/40
Client AS (v6): 8881 (VERSATEL)
IPv6 Probes: 77
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 none /56
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.
IPv4 Adjacent Netblock Testing:
Your host (87.122.4.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 87.122.4.x/24 /31 8881 natblock 87.122.4.x/24 /30 8881 natblock 87.122.4.x/24 /29 8881 natblock 87.122.4.x/24 /28 8881 natblock 87.122.4.x/24 /27 8881 natblock 87.122.4.x/24 /26 8881 natblock 87.122.4.x/24 /25 8881 natblock 87.122.4.x/24 /24 8881 natblock 87.122.5.x/24 /23 8881 natblock 87.122.6.x/24 /22 8881 natblock 87.122.0.x/24 /21 8881 natblock 87.122.12.x/24 /20 8881 natblock 87.122.20.x/24 /19 8881 natblock 87.122.36.x/24 /18 8881 natblock 87.122.68.x/24 /17 8881 natblock 87.122.132.x/24 /16 8881 natblock 87.123.4.x/24 /15 8881 natblock 87.120.4.x/24 /14 UNROUTED natblock 87.126.4.x/24 /13 8866 natblock 87.114.4.x/24 /12 6871 natblock 87.106.4.x/24 /11 8560 natblock 87.90.4.x/24 /10 5410 natblock 87.58.4.x/24 /9 3292 natblock 87.250.4.x/24 /8 3226 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 unable to spoof routable, non-adjacent source addresses through even the first IP hop.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 2001:4978:1fb:6400::d2 2001:770:18:7:225:90ff:fe0c:acb4 no 2001:49aa:111:aa00::11 2001:770:18:7:225:90ff:fe0c:acb4 no fd11:1111:1111::1111 2001:770:18:7:225:90ff:fe0c:acb4 no
Summary:
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 2001:16b8:6xx::/40 /120 8881 yes 2001:16b8:6xx::/40 /112 8881 yes 2001:16b8:6xx::/40 /104 8881 yes 2001:16b8:6xx::/40 /96 8881 yes 2001:16b8:6xx::/40 /88 8881 yes 2001:16b8:6xx::/40 /80 8881 yes 2001:16b8:6xx::/40 /72 8881 yes 2001:16b8:6xx::/40 /64 8881 yes 2001:16b8:6xx::/40 /56 8881 yes 2001:16b8:6xx::/40 /48 8881 no 2001:16b8:6xx::/40 /40 8881 no 2001:16b8:86xx::/40 /32 8881 no 2001:1638:6xx::/40 /24 31400 no 2001:96b8:6xx::/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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