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Session Report

Summary:
Test run at: 2021-08-01 18:37:58 GMT
Client Prefix (v4): 36.255.85.x/24
Client AS (v4): 132559 (GATIK-AS-IN)
IPv4 Probes: 66
Client Prefix (v6): 2405:a140:xx::/40
Client AS (v6): 132559 (GATIK-AS-IN)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedblocked
Routable blockedblocked
Largest spoofable neighbor prefix length none/48
Spoof status key
receivedSpoofed packet was received.Pattern of tests from this IP block indicates a switch from allowing spoofing to blocking it.
rewrittenSpoofed packet was received, but the source address was changed en route.
blockedSpoofed packet was not received, but unspoofed packet was.
unknownNeither spoofed nor unspoofed packet was received.
IPv4 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.
Connection timed out (110)

IPv4 Adjacent Netblock Testing:

Your host (36.255.85.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
36.255.85.x/24/31132559natblock
36.255.85.x/24/30132559natblock
36.255.85.x/24/29132559natblock
36.255.85.x/24/28132559natblock
36.255.85.x/24/27132559natblock
36.255.85.x/24/26132559natblock
36.255.85.x/24/25132559natblock
36.255.85.x/24/24132559natblock
36.255.84.x/24/23132559natblock
36.255.87.x/24/22132559natblock
36.255.81.x/24/21136732natblock
36.255.93.x/24/20213325natblock
36.255.69.x/24/1958923natblock
36.255.117.x/24/18UNROUTEDnatblock
36.255.21.x/24/17UNROUTEDnatblock
36.255.213.x/24/1664200natblock
36.254.85.x/24/15UNROUTEDnatblock
36.253.85.x/24/1438565natblock
36.251.85.x/24/134837natblock
36.247.85.x/24/1237903natblock
36.239.85.x/24/113462natblock
36.223.85.x/24/109394natblock
36.191.85.x/24/99808natblock
36.127.85.x/24/8UNROUTEDnatblock

Meaning of status in Received column:

natblockSpoofed 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:
Spoofed source addressDestinationReceived
2001:48d0:101:501::1592001:48d0:101:501::242no
2001:4978:1fb:6400::d22001:48d0:101:501::242no
2001:49aa:111:aa00::112001:48d0:101:501::242no
fd11:1111:1111::11112001:48d0:101:501::242no
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2405:a140:xx::/40/120132559yes
2405:a140:xx::/40/112132559yes
2405:a140:xx::/40/104132559yes
2405:a140:xx::/40/96132559yes
2405:a140:xx::/40/88132559yes
2405:a140:xx::/40/80132559yes
2405:a140:xx::/40/72132559yes
2405:a140:xx::/40/64132559yes
2405:a140:xx::/40/56132559yes
2405:a140:xx::/40/48132559yes
2405:a140:xx::/40/40132559no
2405:a140:80xx::/40/32132559no
2405:a1c0:xx::/40/24UNROUTEDno
2405:2140:xx::/40/16UNROUTEDno

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
Summary:
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.
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