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Date:      Tue, 2 Apr 2002 20:59:19 -0800 (PST)
From:      John Polstra <jdp@polstra.com>
To:        hubs@freebsd.org
Cc:        jhay@icomtek.csir.co.za
Subject:   Re: ftp-master slow or busy?
Message-ID:  <200204030459.g334xJ622292@vashon.polstra.com>
In-Reply-To: <200204030406.g3346Ih25738@zibbi.icomtek.csir.co.za>
References:  <200204030406.g3346Ih25738@zibbi.icomtek.csir.co.za>

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In article <200204030406.g3346Ih25738@zibbi.icomtek.csir.co.za>,
John Hay  <jhay@icomtek.csir.co.za> wrote:
> > > 
> > Yes, CVSup probably does have a problem with long fat pipes.  In
> > multiplexed mode (the default), the receive buffers are of fixed size
> > and are probably not big enough to accomodate fast links with high
> > latencies.
> 
> Hey this isn't a fast link. :-) We only have a 2Mbit link, so even if
> I could convince the rest of the CSIR to do nothing, I could only hope
> to do 256kByte/s. :-) I wouldn't have thought that fast in US terms. But
> then they do not have the delay. :-/

I'll take your 2 Mbit link with pleasure! :-)  I'm still stuck with
56 kbit frame relay.

> Does anyone know if ftp-master allow passive cvsup connections? I tried
> it, but cvsup just says this:
> 
> Connected to ftp-master
> Falling back to protocol version 16.1
> Cannot connect to data port: Connection refused
> Will retry at 05:59:18
> 
> Looking with netstat -a I see the second connection just stay in SYN_SENT
> state.

It sounds like their firewall is preventing passive mode by
blocking inbound connections to port 5998.  You can probably get
peter@freebsd.org to fix that.

Or, if you are not behind NAT, active mode will probably work.  To
select it, either use "-P a" or "-P 6666" (for example).  It works
like FTP, where the server initiates a connection back to the client.
With "-P a" the client will listen on an arbitrary transient port.
With the numeric form you can specify a particular port number or a
range of ports.  Your firewall will need to allow inbound connections
to the relevant ports, of course.

John
-- 
  John Polstra
  John D. Polstra & Co., Inc.                        Seattle, Washington USA
  "Disappointment is a good sign of basic intelligence."  -- Chögyam Trungpa


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