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04.02.2008 at 07:58PM PDT, ID: 23291590
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Why does FTP show an established connection to a non-existant host?

Asked by kevin_buchanan in TCP/IP, File Transfer Protocol (FTP), Microsoft Operating Systems

Try this:  (from XP workstaton)
Open two command prompts.

In one command prompt, type:
     ftp 10.255.254.254  (or any non-existant host address you make up)

In the other command prompt, type:
netstat -na | find /i ":21"
  TCP    10.0.1.22:4945         10.255.254.254:21      ESTABLISHED
  TCP    10.0.1.22:4947         10.255.254.254:21      SYN_SENT

I can understand the SYN_SENT because it is trying to establish a handshake, but why would it show a "ESTABLISHED" connection when the host address is non-existant?Start Free Trial
 
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[+][-]04.02.2008 at 11:03PM PDT, ID: 21270001

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About this solution

Zones: TCP/IP, File Transfer Protocol (FTP), Microsoft Operating Systems
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Solution Provided By: Bamit99
Participating Experts: 2
Solution Grade: A
 
 
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