RE: [fw-wiz] Issues opeing firewall for SSH/SecureFTP?

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To: David West <davedub@yahoo.com>
Date: Fri, 20 Aug 2004 11:38:39 -0400 (EDT)

The May 2004 issue of sysadmin mag had an article on "secure file transfer
w/ chrooted sftp-only accounts", perhaps that might be useful?

Thanks,

Ron DuFresne

On Thu, 19 Aug 2004, David West wrote:

> I've recently been looking at a similar request.
>
> Has anyone on the list looked at using a restricted
> shell such as rssh or scponly to restrict scp or sftp
> without a remote shell?
>
> rssh - http://www.pizzashack.org/rssh/
> scponly - http://sublimation.org/scponly/
>
> David
>
>
> > From: "Bill Royds" <broyds@rogers.com>
> > To: <firewall-wizards@honor.icsalabs.com>
> > Subject: RE: [fw-wiz] Issues opeing firewall for
> > SSH/SecureFTP?
> > Date: Thu, 12 Aug 2004 15:44:39 -0400
> >
> > Whether VPN or SSH is appropriate really depends on
> > the situation. A contractor
> > needing access to a particular server on your
> > internal network would be better
> > served by a VPN directly to that server with a stack
> > that blocks splitting the
> > routing when the VPN is up (no access to internal
> > network when VPN is working).
> > They can look at the server fully including using
> > something like Terminal Server
> > to run installs and diagnostics. This VPN would be
> > through your firewall, not
> > terminated at your firewall.
> > But if all they needed was a single purpose
> > access, such as file transfer then
> > SFTP over SSH generally is appropriate. But remember
> > that SSH is Secure SHELL.
> > It gives command line access to the remote machine,
> > which means a lot of control
> > over your server. Some clients and servers can
> > control it to only allow SFTP,
> > but one has to set things up carefully to avoid
> > giving access to the system.
> >
> > -----Original Message-----
> > From: firewall-wizards-admin@honor.icsalabs.com
> > [mailto:firewall-wizards-admin@honor.icsalabs.com]
> > On Behalf Of Chris Conacher
> > Sent: Monday, August 09, 2004 3:35 PM
> > To: firewall-wizards@honor.icsalabs.com
> > Subject: [fw-wiz] Issues opeing firewall for
> > SSH/SecureFTP?
> >
> > Dear List
> >
> > I am currently trying to move an organization's
> > current solution of VPN for
> > external contractors performing file transfer, to
> > SecureFTP.
> >
> > My belief has always been that SecureFTP is the
> > appropriate solution for
> > secure file transfer and the aim should always be to
> > avoid giving remote
> > access to internal networks [especially
> > non-employee] where it is not
> > specifically required.
> >
> > My question is are there any other issues that I
> > should be aware of with
> > allowing SecureFTP/SSH through the firewall as one
> > of the standard pushes
> > (read knee jerk reactions) against this appears to
> > be that another port is
> > opened on the firewall?
> >
> > 1. I have worked in a lot of different organizations
> > where VPN seems to be
> > the norm for everyone even where the only
> > requirement is file transfer
> > 2. My belief is that this is because the
> > organization does not appreciate
> > the implications of allowing non-employees access to
> > the internal network
> > and does not understand that SecureFTP is an
> > appropriate solution
> > 3. I understand that SSH is a great opportunity for
> > tunneling attacks if an
> > exploit is discovered, but I feel that there is it
> > possible to manage this
> > exposure through the existence of a DMZ based
> > bastion host, rather than
> > providing external people with access to the VPN.
> >
> > Comments appreciated.
> >
> > Chris
> >
> >
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• Previous message: Bill Royds: "RE: [fw-wiz] NAPT - NAT Port selection"
• In reply to: David West: "RE: [fw-wiz] Issues opeing firewall for SSH/SecureFTP?"
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