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Session Report

Summary:
Test run at: 2026-01-29 09:36:56 GMT
Client Prefix (v4): 41.70.104.x/24
Client AS (v4): 37215 (MAREN)
IPv4 Probes: 162
Client Prefix (v6): 2c0f:ea60:41xx::/40
Client AS (v6): 37215 (MAREN)
IPv6 Probes: 180
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA receivedblocked
Routable receivedblocked
Largest spoofable neighbor prefix length /8/32
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.

Warnings:

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.

  

  

IPv4 Adjacent Netblock Testing:

Your host (41.70.104.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
41.70.104.x/24/3137215yes
41.70.104.x/24/3037215yes
41.70.104.x/24/2937215yes
41.70.104.x/24/2837215yes
41.70.104.x/24/2737215yes
41.70.104.x/24/2637215yes
41.70.104.x/24/2537215yes
41.70.104.x/24/2437215yes
41.70.105.x/24/2337215yes
41.70.106.x/24/2237215yes
41.70.108.x/24/2137215yes
41.70.96.x/24/2037215yes
41.70.120.x/24/1937215yes
41.70.72.x/24/1837215yes
41.70.40.x/24/1737215yes
41.70.232.x/24/1637081yes
41.71.104.x/24/1537053yes
41.68.104.x/24/1424835yes
41.66.104.x/24/1351265yes
41.78.104.x/24/12UNROUTEDyes
41.86.104.x/24/11UNROUTEDyes
41.102.104.x/24/1036947yes
41.6.104.x/24/929975yes
41.198.104.x/24/8UNROUTEDyes

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received
yesPackets 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 10 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:
Spoofed source addressDestinationReceived
2001:48d0:101:501::1592001:19f0:1000:363e:5400:4ff:fea6:6a66no
2001:4978:1fb:6400::d22001:19f0:1000:363e:5400:4ff:fea6:6a66no
2001:49aa:111:aa00::112001:19f0:1000:363e:5400:4ff:fea6:6a66no
fd11:1111:1111::11112001:19f0:1000:363e:5400:4ff:fea6:6a66no
2001:48d0:101:501::1592001:19f0:5401:182d:5400:4ff:fea6:69f9no
2001:4978:1fb:6400::d22001:19f0:5401:182d:5400:4ff:fea6:69f9no
2001:49aa:111:aa00::112001:19f0:5401:182d:5400:4ff:fea6:69f9no
fd11:1111:1111::11112001:19f0:5401:182d:5400:4ff:fea6:69f9no
2001:48d0:101:501::1592001:19f0:5c00:1e23:5400:4ff:fea6:6b47no
2001:4978:1fb:6400::d22001:19f0:5c00:1e23:5400:4ff:fea6:6b47no
2001:49aa:111:aa00::112001:19f0:5c00:1e23:5400:4ff:fea6:6b47no
fd11:1111:1111::11112001:19f0:5c00:1e23:5400:4ff:fea6:6b47no
2001:48d0:101:501::1592001:19f0:6001:5827:5400:4ff:fea6:6ab2no
2001:4978:1fb:6400::d22001:19f0:6001:5827:5400:4ff:fea6:6ab2no
2001:49aa:111:aa00::112001:19f0:6001:5827:5400:4ff:fea6:6ab2no
fd11:1111:1111::11112001:19f0:6001:5827:5400:4ff:fea6:6ab2no
2001:48d0:101:501::1592001:19f0:6402:893:5400:4ff:fea6:6a5cno
2001:4978:1fb:6400::d22001:19f0:6402:893:5400:4ff:fea6:6a5cno
2001:49aa:111:aa00::112001:19f0:6402:893:5400:4ff:fea6:6a5cno
fd11:1111:1111::11112001:19f0:6402:893:5400:4ff:fea6:6a5cno
2001:48d0:101:501::1592001:19f0:6801:6b9:5400:4ff:fea6:6a34no
2001:4978:1fb:6400::d22001:19f0:6801:6b9:5400:4ff:fea6:6a34no
2001:49aa:111:aa00::112001:19f0:6801:6b9:5400:4ff:fea6:6a34no
fd11:1111:1111::11112001:19f0:6801:6b9:5400:4ff:fea6:6a34no
2001:48d0:101:501::1592001:19f0:6c00:1da9:5400:4ff:fea6:6a74no
2001:4978:1fb:6400::d22001:19f0:6c00:1da9:5400:4ff:fea6:6a74no
2001:49aa:111:aa00::112001:19f0:6c00:1da9:5400:4ff:fea6:6a74no
fd11:1111:1111::11112001:19f0:6c00:1da9:5400:4ff:fea6:6a74no
2001:48d0:101:501::1592001:19f0:7402:9aa:5400:4ff:fea6:6ac6no
2001:4978:1fb:6400::d22001:19f0:7402:9aa:5400:4ff:fea6:6ac6no
2001:49aa:111:aa00::112001:19f0:7402:9aa:5400:4ff:fea6:6ac6no
fd11:1111:1111::11112001:19f0:7402:9aa:5400:4ff:fea6:6ac6no
2001:48d0:101:501::1592001:19f0:9003:8b9:5400:4ff:fea6:6b22no
2001:4978:1fb:6400::d22001:19f0:9003:8b9:5400:4ff:fea6:6b22no
2001:49aa:111:aa00::112001:19f0:9003:8b9:5400:4ff:fea6:6b22no
fd11:1111:1111::11112001:19f0:9003:8b9:5400:4ff:fea6:6b22no
2001:48d0:101:501::1592001:19f0:ac00:3671:5400:4ff:fea6:6b71no
2001:4978:1fb:6400::d22001:19f0:ac00:3671:5400:4ff:fea6:6b71no
2001:49aa:111:aa00::112001:19f0:ac00:3671:5400:4ff:fea6:6b71no
fd11:1111:1111::11112001:19f0:ac00:3671:5400:4ff:fea6:6b71no
2001:48d0:101:501::1592001:19f0:b002:1ef:5400:4ff:fea6:6be9no
2001:4978:1fb:6400::d22001:19f0:b002:1ef:5400:4ff:fea6:6be9no
2001:49aa:111:aa00::112001:19f0:b002:1ef:5400:4ff:fea6:6be9no
fd11:1111:1111::11112001:19f0:b002:1ef:5400:4ff:fea6:6be9no
2001:48d0:101:501::1592001:19f0:b400:16a4:5400:4ff:fea6:6b0dno
2001:4978:1fb:6400::d22001:19f0:b400:16a4:5400:4ff:fea6:6b0dno
2001:49aa:111:aa00::112001:19f0:b400:16a4:5400:4ff:fea6:6b0dno
fd11:1111:1111::11112001:19f0:b400:16a4:5400:4ff:fea6:6b0dno
2001:48d0:101:501::1592001:19f0:b800:1b21:5400:4ff:fea5:cd5ano
2001:4978:1fb:6400::d22001:19f0:b800:1b21:5400:4ff:fea5:cd5ano
2001:49aa:111:aa00::112001:19f0:b800:1b21:5400:4ff:fea5:cd5ano
fd11:1111:1111::11112001:19f0:b800:1b21:5400:4ff:fea5:cd5ano
2001:48d0:101:501::1592001:19f0:c000:d254:5400:4ff:fea5:cd47no
2001:4978:1fb:6400::d22001:19f0:c000:d254:5400:4ff:fea5:cd47no
2001:49aa:111:aa00::112001:19f0:c000:d254:5400:4ff:fea5:cd47no
fd11:1111:1111::11112001:19f0:c000:d254:5400:4ff:fea5:cd47no
2001:48d0:101:501::1592001:19f0:c800:2f95:5400:4ff:fea6:6b55no
2001:4978:1fb:6400::d22001:19f0:c800:2f95:5400:4ff:fea6:6b55no
2001:49aa:111:aa00::112001:19f0:c800:2f95:5400:4ff:fea6:6b55no
fd11:1111:1111::11112001:19f0:c800:2f95:5400:4ff:fea6:6b55no
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
2001:48d0:101:501::1592401:c080:1000:4fdc:5400:4ff:fea6:6b3ano
2001:4978:1fb:6400::d22401:c080:1000:4fdc:5400:4ff:fea6:6b3ano
2001:49aa:111:aa00::112401:c080:1000:4fdc:5400:4ff:fea6:6b3ano
fd11:1111:1111::11112401:c080:1000:4fdc:5400:4ff:fea6:6b3ano
2001:48d0:101:501::1592401:c080:1400:763f:5400:4ff:fea6:6b65no
2001:4978:1fb:6400::d22401:c080:1400:763f:5400:4ff:fea6:6b65no
2001:49aa:111:aa00::112401:c080:1400:763f:5400:4ff:fea6:6b65no
fd11:1111:1111::11112401:c080:1400:763f:5400:4ff:fea6:6b65no
2001:48d0:101:501::1592401:c080:1800:4f38:5400:4ff:fea6:6ba4no
2001:4978:1fb:6400::d22401:c080:1800:4f38:5400:4ff:fea6:6ba4no
2001:49aa:111:aa00::112401:c080:1800:4f38:5400:4ff:fea6:6ba4no
fd11:1111:1111::11112401:c080:1800:4f38:5400:4ff:fea6:6ba4no
2001:48d0:101:501::1592401:c080:1c00:2303:5400:4ff:fea6:6a7eno
2001:4978:1fb:6400::d22401:c080:1c00:2303:5400:4ff:fea6:6a7eno
2001:49aa:111:aa00::112401:c080:1c00:2303:5400:4ff:fea6:6a7eno
fd11:1111:1111::11112401:c080:1c00:2303:5400:4ff:fea6:6a7eno
2001:48d0:101:501::1592401:c080:2000:1929:5400:4ff:fea6:6b07no
2001:4978:1fb:6400::d22401:c080:2000:1929:5400:4ff:fea6:6b07no
2001:49aa:111:aa00::112401:c080:2000:1929:5400:4ff:fea6:6b07no
fd11:1111:1111::11112401:c080:2000:1929:5400:4ff:fea6:6b07no
2001:48d0:101:501::1592401:c080:2400:167d:5400:4ff:fea6:6a20no
2001:4978:1fb:6400::d22401:c080:2400:167d:5400:4ff:fea6:6a20no
2001:49aa:111:aa00::112401:c080:2400:167d:5400:4ff:fea6:6a20no
fd11:1111:1111::11112401:c080:2400:167d:5400:4ff:fea6:6a20no
2001:48d0:101:501::1592401:c080:3000:27ce:5400:4ff:fea6:6a0bno
2001:4978:1fb:6400::d22401:c080:3000:27ce:5400:4ff:fea6:6a0bno
2001:49aa:111:aa00::112401:c080:3000:27ce:5400:4ff:fea6:6a0bno
fd11:1111:1111::11112401:c080:3000:27ce:5400:4ff:fea6:6a0bno
2001:48d0:101:501::1592401:c080:3400:2851:5400:4ff:fea6:6a4dno
2001:4978:1fb:6400::d22401:c080:3400:2851:5400:4ff:fea6:6a4dno
2001:49aa:111:aa00::112401:c080:3400:2851:5400:4ff:fea6:6a4dno
fd11:1111:1111::11112401:c080:3400:2851:5400:4ff:fea6:6a4dno
2001:48d0:101:501::1592401:c080:3800:3731:5400:4ff:fea6:6a90no
2001:4978:1fb:6400::d22401:c080:3800:3731:5400:4ff:fea6:6a90no
2001:49aa:111:aa00::112401:c080:3800:3731:5400:4ff:fea6:6a90no
fd11:1111:1111::11112401:c080:3800:3731:5400:4ff:fea6:6a90no
2001:48d0:101:501::1592a05:f480:1400:28fc:5400:4ff:fea6:69e9no
2001:4978:1fb:6400::d22a05:f480:1400:28fc:5400:4ff:fea6:69e9no
2001:49aa:111:aa00::112a05:f480:1400:28fc:5400:4ff:fea6:69e9no
fd11:1111:1111::11112a05:f480:1400:28fc:5400:4ff:fea6:69e9no
2001:48d0:101:501::1592a05:f480:2000:1f7b:5400:4ff:fea6:6b85no
2001:4978:1fb:6400::d22a05:f480:2000:1f7b:5400:4ff:fea6:6b85no
2001:49aa:111:aa00::112a05:f480:2000:1f7b:5400:4ff:fea6:6b85no
fd11:1111:1111::11112a05:f480:2000:1f7b:5400:4ff:fea6:6b85no
2001:48d0:101:501::1592a05:f480:2400:1f3f:5400:4ff:fea6:6bdbno
2001:4978:1fb:6400::d22a05:f480:2400:1f3f:5400:4ff:fea6:6bdbno
2001:49aa:111:aa00::112a05:f480:2400:1f3f:5400:4ff:fea6:6bdbno
fd11:1111:1111::11112a05:f480:2400:1f3f:5400:4ff:fea6:6bdbno
2001:48d0:101:501::1592a05:f480:2800:16b7:5400:4ff:fea6:6adfno
2001:4978:1fb:6400::d22a05:f480:2800:16b7:5400:4ff:fea6:6adfno
2001:49aa:111:aa00::112a05:f480:2800:16b7:5400:4ff:fea6:6adfno
fd11:1111:1111::11112a05:f480:2800:16b7:5400:4ff:fea6:6adfno
2001:48d0:101:501::1592a05:f480:2c00:15ba:5400:4ff:fea6:6bccno
2001:4978:1fb:6400::d22a05:f480:2c00:15ba:5400:4ff:fea6:6bccno
2001:49aa:111:aa00::112a05:f480:2c00:15ba:5400:4ff:fea6:6bccno
fd11:1111:1111::11112a05:f480:2c00:15ba:5400:4ff:fea6:6bccno
2001:48d0:101:501::1592a05:f480:3000:22ab:5400:4ff:fea6:6aa6no
2001:4978:1fb:6400::d22a05:f480:3000:22ab:5400:4ff:fea6:6aa6no
2001:49aa:111:aa00::112a05:f480:3000:22ab:5400:4ff:fea6:6aa6no
fd11:1111:1111::11112a05:f480:3000:22ab:5400:4ff:fea6:6aa6no
2001:48d0:101:501::1592a05:f480:3400:294b:5400:4ff:fea6:6af1no
2001:4978:1fb:6400::d22a05:f480:3400:294b:5400:4ff:fea6:6af1no
2001:49aa:111:aa00::112a05:f480:3400:294b:5400:4ff:fea6:6af1no
fd11:1111:1111::11112a05:f480:3400:294b:5400:4ff:fea6:6af1no
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2c0f:ea60:41xx::/40/12037215yes
2c0f:ea60:41xx::/40/11237215yes
2c0f:ea60:41xx::/40/10437215yes
2c0f:ea60:41xx::/40/9637215yes
2c0f:ea60:41xx::/40/8837215yes
2c0f:ea60:41xx::/40/8037215yes
2c0f:ea60:41xx::/40/7237215yes
2c0f:ea60:41xx::/40/6437215yes
2c0f:ea60:41xx::/40/5637215yes
2c0f:ea60:41xx::/40/4837215yes
2c0f:ea60:41xx::/40/4037215yes
2c0f:ea60:c1xx::/40/3237215yes
2c0f:eae0:41xx::/40/2437521no
2c0f:6a60:41xx::/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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