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Session Report

Summary:
Test run at: 2022-07-18 11:04:56 GMT
Client Prefix (v4): 62.77.173.x/24
Client AS (v4): 5466 (EIRCOM)
IPv4 Probes: 60
Client Prefix (v6): 2001:bb0:ccxx::/40
Client AS (v6): 5466 (EIRCOM)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenblocked
Routable rewrittenblocked
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.

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 (62.77.173.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
62.77.173.x/24/315466rewritten
62.77.173.x/24/305466rewritten
62.77.173.x/24/295466rewritten
62.77.173.x/24/285466rewritten
62.77.173.x/24/275466rewritten
62.77.173.x/24/265466rewritten
62.77.173.x/24/255466rewritten
62.77.173.x/24/245466rewritten
62.77.172.x/24/235466rewritten
62.77.175.x/24/225466rewritten
62.77.169.x/24/215466rewritten
62.77.165.x/24/205466rewritten
62.77.189.x/24/195466rewritten
62.77.141.x/24/186821rewritten
62.77.237.x/24/1712301rewritten
62.77.45.x/24/1620746rewritten
62.76.173.x/24/158981rewritten
62.79.173.x/24/149158rewritten
62.73.173.x/24/132914rewritten
62.69.173.x/24/12UNROUTEDrewritten
62.93.173.x/24/113257rewritten
62.109.173.x/24/1024783rewritten
62.13.173.x/24/924608rewritten
62.205.173.x/24/88402rewritten

Meaning of status in Received column:

rewrittenThe source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.

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 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
2001:48d0:101:501::1592001:48d0:101:501::247no
2001:4978:1fb:6400::d22001:48d0:101:501::247no
2001:49aa:111:aa00::112001:48d0:101:501::247no
fd11:1111:1111::11112001:48d0:101:501::247no
2001:48d0:101:501::1592001:610:510:115:192:42:115:98no
2001:4978:1fb:6400::d22001:610:510:115:192:42:115:98no
2001:49aa:111:aa00::112001:610:510:115:192:42:115:98no
fd11:1111:1111::11112001:610:510:115:192:42:115:98no
2001:48d0:101:501::1592001:630:212:225:225:90ff:fe0c:45a6no
2001:4978:1fb:6400::d22001:630:212:225:225:90ff:fe0c:45a6no
2001:49aa:111:aa00::112001:630:212:225:225:90ff:fe0c:45a6no
fd11:1111:1111::11112001:630:212:225:225:90ff:fe0c:45a6no
2001:48d0:101:501::1592001:770:1c:7:225:90ff:fe0c:acb4no
2001:4978:1fb:6400::d22001:770:1c:7:225:90ff:fe0c:acb4no
2001:49aa:111:aa00::112001:770:1c:7:225:90ff:fe0c:acb4no
fd11:1111:1111::11112001:770:1c:7:225:90ff:fe0c:acb4no
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2001:bb0:ccxx::/40/1205466yes
2001:bb0:ccxx::/40/1125466yes
2001:bb0:ccxx::/40/1045466yes
2001:bb0:ccxx::/40/965466yes
2001:bb0:ccxx::/40/885466yes
2001:bb0:ccxx::/40/805466yes
2001:bb0:ccxx::/40/725466yes
2001:bb0:ccxx::/40/645466yes
2001:bb0:ccxx::/40/565466yes
2001:bb0:ccxx::/40/485466yes
2001:bb0:ccxx::/40/405466no
2001:bb0:4cxx::/40/325466no
2001:b30:ccxx::/40/242614no
2001:8bb0:ccxx::/40/161221no

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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