Session Report
Test run at: 2025-07-24 01:36:47 GMTIPv4 AS Route:
Client Prefix (v4): 185.53.90.x/24
Client AS (v4): 3920 (IMS-RTFM)
IPv4 Probes: 162
Client Prefix (v6): 2a13:adc0:xx::/40
Client AS (v6): 3920 (IMS-RTFM)
IPv6 Probes: 180
Outbound spoofing summary (from the client to our server) Source address type IPv4 IPv6 Private - RFC1918 or ULA ✔ blocked ✔ received Routable ✔ blocked received Largest spoofable neighbor prefix length /23 /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.
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 (185.53.90.x/24) can spoof 511 neighboring addresses (within your /23 prefix)
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 185.53.90.x/24 /31 3920 yes 185.53.90.x/24 /30 3920 yes 185.53.90.x/24 /29 3920 yes 185.53.90.x/24 /28 3920 yes 185.53.90.x/24 /27 3920 yes 185.53.90.x/24 /26 3920 yes 185.53.90.x/24 /25 3920 yes 185.53.90.x/24 /24 3920 yes 185.53.91.x/24 /23 3920 yes 185.53.88.x/24 /22 213371 no 185.53.94.x/24 /21 57793 no 185.53.82.x/24 /20 30781 no 185.53.74.x/24 /19 59770 no 185.53.122.x/24 /18 204118 no 185.53.26.x/24 /17 UNROUTED no 185.53.218.x/24 /16 28876 no 185.52.90.x/24 /15 15805 no 185.55.90.x/24 /14 51580 no 185.49.90.x/24 /13 202463 no 185.61.90.x/24 /12 31472 no 185.37.90.x/24 /11 UNROUTED no 185.21.90.x/24 /10 42708 no 185.117.90.x/24 /9 59711 no 185.181.90.x/24 /8 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)
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 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 no 2001:4978:1fb:6400::d2 2001:40b0:7500:280::5458:517a no 2001:49aa:111:aa00::11 2001:40b0:7500:280::5458:517a no 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 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 2001:770:1c: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 yes 2001:48d0:101:501::159 2607:8400:2880:4::80df:9d0d yes 2001:4978:1fb:6400::d2 2607:8400:2880:4::80df:9d0d yes 2001:49aa:111:aa00::11 2607:8400:2880:4::80df:9d0d yes fd11:1111:1111::1111 2607:8400:2880:4::80df:9d0d no 2001:48d0:101:501::159 2607:f278:2:13:da3a:ddff:fe30:ce14 yes 2001:4978:1fb:6400::d2 2607:f278:2:13:da3a:ddff:fe30:ce14 yes 2001:49aa:111:aa00::11 2607:f278:2:13:da3a:ddff:fe30:ce14 yes fd11:1111:1111::1111 2607:f278:2:13:da3a:ddff:fe30:ce14 yes
Summary:
Spoofed source address (anon) Prefix
LengthASN of spoofed
source addressReceived 2a13:adc0:xx::/40 /120 3920 yes 2a13:adc0:xx::/40 /112 3920 yes 2a13:adc0:xx::/40 /104 3920 yes 2a13:adc0:xx::/40 /96 3920 yes 2a13:adc0:xx::/40 /88 3920 yes 2a13:adc0:xx::/40 /80 3920 yes 2a13:adc0:xx::/40 /72 3920 yes 2a13:adc0:xx::/40 /64 3920 yes 2a13:adc0:xx::/40 /56 3920 yes 2a13:adc0:xx::/40 /48 3920 yes 2a13:adc0:xx::/40 /40 UNROUTED yes 2a13:adc0:80xx::/40 /32 UNROUTED yes 2a13:ad40:xx::/40 /24 214991 yes 2a13:2dc0:xx::/40 /16 28753 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:
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.