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Session Report

Summary:
Test run at: 2022-10-20 16:51:09 GMT
Client Prefix (v4): 177.81.74.x/24
Client AS (v4): 28573
IPv4 Probes: 60
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 (177.81.74.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
177.81.74.x/24/3128573rewritten
177.81.74.x/24/3028573rewritten
177.81.74.x/24/2928573rewritten
177.81.74.x/24/2828573rewritten
177.81.74.x/24/2728573rewritten
177.81.74.x/24/2628573rewritten
177.81.74.x/24/2528573rewritten
177.81.74.x/24/2428573rewritten
177.81.75.x/24/2328573rewritten
177.81.72.x/24/2228573rewritten
177.81.78.x/24/2128573rewritten
177.81.66.x/24/2028573rewritten
177.81.90.x/24/1928573rewritten
177.81.106.x/24/1828573rewritten
177.81.10.x/24/1728573rewritten
177.81.202.x/24/1628573rewritten
177.80.74.x/24/1528573rewritten
177.83.74.x/24/1428573rewritten
177.85.74.x/24/1352739rewritten
177.89.74.x/24/1228220rewritten
177.65.74.x/24/11UNROUTEDrewritten
177.113.74.x/24/1026599rewritten
177.17.74.x/24/918881rewritten
177.209.74.x/24/87738rewritten

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 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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