Re: Allowing CVS, RCP & SCP

Linux Advanced Routing and Traffic Control

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On Thu, Jul 04, 2002 at 02:01:07PM +0100, Alex Bennee wrote:
> A. Peter Mee said:
> > Hi all,
> >
> > Could someone give me some pointers to achieving stable cvs and rcp
> > access through a fairly restrictive firewall.  I'm using a 2.4.18
> > kernel which defaults to dropping everthing, then punching holes where
> > needed and SNATting the internal network.  Single-socket protocols
> > (http, smtp, pop3) do currently function correctly through the firewall
> > so I'm assuming the cvs and rcp/scp protocols are not single-socket.
> > The ftp and irc protocols also function correctly through the firewall.
> 
> ssh is a single socket protocol. If you can ssh through your firewall then
> you can use scp. You can even tunnel other ports over the single ssh
> connection (e.g. X).
> 
> CVS isn't a network protocol. You generally run it using remote shell tools,
> in the CVS manual it allows you to specifify how with the CVS_RSH evrionment
> variable.

CVS 'pserver' lives on port 2401. Use netstat -an to see which ports have
LISTENing sockets, and open up those ports.

Regards,

bert

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