Re: FTP connected ... but ...

From: Barry Margolin (barmar_at_alum.mit.edu)
Date: 09/25/05 

Date: Sat, 24 Sep 2005 21:55:48 -0400

In article <02fZe.70316$SL.1379294@twister.southeast.rr.com>,
 base60 <nobody@whitehouse.com> wrote:

> Barry Margolin wrote:
> > In article <XicZe.70219$SL.1368633@twister.southeast.rr.com>,
> > base60 <nobody@whitehouse.com> wrote:
> >
> >
> >>>>Sounds like a firewall.... possibly a hosed route.
> >>>
> >>>
> >>>No it doesn't. If it were a routing problem, he'd never get connected
> >>>in the first place.
> >>
> >>Let me be more precise: A routing problem on the system to which he
> >>is trying to ftp -- not the originating system.
> >>
> >>If that were the case, I believe he would get a connection, but not
> >>receive any indication of the connection... and a snoop on the ftp
> >>server would show the connection.
> >
> >
> > How? In order to get a connection, you have to receive a SYN-ACK in
> > response to the SYN you send out. If the server doesn't have a route
> > back to you, you'll never get the SYN-ACK.
>
> Semantics, issue possibly...
>
> Agreed, the connection would never be *complete*, because the syn-ack
> would never be received.
>
> But, the ftp server would have received/responded to the syn... seems
> like this would result in a "hang" on the sending side. Correct?

Correct. It would hang *before* saying "Connected". The OP said that
he gets that message and *then* it hangs. 

-- 
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***

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