Logo

Session Report

Summary:
Test run at: 2020-09-08 18:06:07 GMT
Client Prefix (v4): 173.244.192.x/24
Client AS (v4): 36351 (SOFTLAYER)
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length /24
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.

IPv4 Adjacent Netblock Testing:

Your host (173.244.192.x/24) can spoof 255 neighboring addresses (within your /24 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
173.244.192.x/24/3136351yes
173.244.192.x/24/3036351yes
173.244.192.x/24/2936351yes
173.244.192.x/24/2836351natblock
173.244.192.x/24/2736351yes
173.244.192.x/24/2636351yes
173.244.192.x/24/2536351yes
173.244.192.x/24/2436351yes
173.244.193.x/24/2336351natblock
173.244.194.x/24/2213213natblock
173.244.196.x/24/2136351natblock
173.244.200.x/24/2032780natblock
173.244.208.x/24/1929854natblock
173.244.224.x/24/1815227natblock
173.244.128.x/24/1715164natblock
173.244.64.x/24/16UNROUTEDnatblock
173.245.192.x/24/1526769natblock
173.246.192.x/24/1453488natblock
173.240.192.x/24/13UNROUTEDnatblock
173.252.192.x/24/1220248natblock
173.228.192.x/24/1110396natblock
173.212.192.x/24/1051167natblock
173.180.192.x/24/9852natblock
173.116.192.x/24/810507natblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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 able to spoof routable, non-adjacent source addresses through the first 1 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