Logo

Session Report

Summary:
Test run at: 2020-09-02 16:03:09 GMT
Client Prefix (v4): 89.187.187.x/24
Client AS (v4): 60068 (CDN77)
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable rewritten
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 (89.187.187.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
89.187.187.x/24/3160068natblock
89.187.187.x/24/3060068rewritten
89.187.187.x/24/2960068rewritten
89.187.187.x/24/2860068rewritten
89.187.187.x/24/2760068rewritten
89.187.187.x/24/2660068rewritten
89.187.187.x/24/2560068rewritten
89.187.187.x/24/2460068rewritten
89.187.186.x/24/2360068rewritten
89.187.185.x/24/2260068rewritten
89.187.191.x/24/2160068rewritten
89.187.179.x/24/2060068rewritten
89.187.171.x/24/1960068rewritten
89.187.155.x/24/1835592rewritten
89.187.251.x/24/1743939rewritten
89.187.59.x/24/1625129rewritten
89.186.187.x/24/1516245rewritten
89.185.187.x/24/1439847rewritten
89.191.187.x/24/13UNROUTEDrewritten
89.179.187.x/24/128402rewritten
89.171.187.x/24/1112741rewritten
89.155.187.x/24/102860rewritten
89.251.187.x/24/941606rewritten
89.59.187.x/24/8UNROUTEDrewritten

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.
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 2 IP hop(s).
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.
Last Modified