[devel] [bowman на math.ualberta.ca: Re: NFS over ssh]

Dmitry V. Levin =?iso-8859-1?q?ldv_=CE=C1_alt-linux=2Eorg?=
Чт Май 10 18:32:26 MSD 2001

----- Forwarded message from John Bowman <bowman на math.ualberta.ca> -----

Date: 10 May 2001 14:05:52 -0000
From: John Bowman <bowman на math.ualberta.ca>
To: openssh-unix-dev на mindrot.org
Cc: skatalic на GENUITY.NET, devon на admin2.gisnetworks.com
Subject: Re: NFS over ssh

Secure NFS (SNFS) via SSH tunneling of UDP datagrams, as suggested in the
SSH FAQ, has now been implemented and is available for download from
http://www.math.ualberta.ca/imaging/snfs/. This is an enhancement of the
original sec_rpc package developed by Holger Trapp.

* Tunneling via SSH increases the security of the connection and prevents
IP spoofing.

* SNFS has been tested on Linux i386 and alpha platforms under RedHat 6.2.

* No changes to the kernel or existing daemons are required.

* On a high-end workstation, tunneling of large files results in only a slight
degradation in speed (eg. 4MB/s instead of 5MB/s).

* Detailed configuration instructions are contained in the file NFS/README.NFS.

Here is a question for this group: so far, of the 4 UDP services, only
mountd and nfsd are being tunneled through ssh.  In sec_rpc-1.0,
portmap/rpcbind and the lock manager are not being tunneled, because
the system is configured so that only local connections to the portmap are
allowed anyway (via /etc/hosts.allow). Are there any security concerns here?


-- John Bowman
University of Alberta

----- End forwarded message -----


Dmitry V. Levin     mailto://ldv@alt-linux.org
ALT Linux Team      http://www.altlinux.ru/
Fandra Project      http://www.fandra.org/
UNIX is user friendly. It's just very selective about who its friends are.
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