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Session Report

Summary:
Test run at: 2020-08-15 00:01:56 GMT
Client Prefix (v4): 198.255.93.x/24
Client AS (v4): 174 (COGENT-174)
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 unknown
Routable unknown
Largest spoofable neighbor prefix length none
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 Adjacent Netblock Testing:

Your host (198.255.93.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
198.255.93.x/24/31174natblock
198.255.93.x/24/30174natblock
198.255.93.x/24/29174natblock
198.255.93.x/24/28174natblock
198.255.93.x/24/27174natblock
198.255.93.x/24/26174natblock
198.255.93.x/24/25174natblock
198.255.93.x/24/24174natblock
198.255.92.x/24/23174natblock
198.255.95.x/24/22174natblock
198.255.89.x/24/21174natblock
198.255.85.x/24/20174natblock
198.255.77.x/24/19174natblock
198.255.125.x/24/18174natblock
198.255.29.x/24/17174natblock
198.255.221.x/24/1611351natblock
198.254.93.x/24/1526827natblock
198.253.93.x/24/14UNROUTEDnatblock
198.251.93.x/24/139009natblock
198.247.93.x/24/122914natblock
198.239.93.x/24/114193natblock
198.223.93.x/24/106167natblock
198.191.93.x/24/9UNROUTEDnatblock
198.127.93.x/24/8291natblock

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.
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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