Slow SSH tunnel speed

[Gabriel Paré-Olivier]

Hi,

My overall goal is to access my shares from a remote location with some kind of security and at a good and steady transfer speed. I think setting an SSH tunnel to access he shares is a good way of achieving this goal. I've set a SSH tunnel following this procedure: http://www.nikhef.nl/~janjust/CifsOverSSH/Win8Loopback.html It's working, I'm glad.

The problem is that transfer speed are not very good. On LAN through SMB (normal share) I have 40+ Mbps on both directions (on WiFi, so about 80% of bandwidth). On SSH on LAN (same connection, only difference is that it's through SSH instead of SMB directly), average transfer speeds are about 7 Mbps. CPU load is high but not at 100%. Also transfer speed is oscillating between less than 1 Mbps to about 12 Mbps.

I'm trying to improve this. I've searched a bit, some people improved their performance by using other SSH encryption protocols: http://blog.christophersmart.com/2009/04/04/speed-test-on-the-dns-323/

I've looked the dropbear manual and it really seems to be designed for small computers. I guess someone smarter than me has already figured out what is the most appropriate encryption protocol and all the technical details.

My questions are:

1- Does somebody have much better transfer speeds through SSH than me?

2- Does somebody has an idea of what could be done to improve things?

3- Are some people using other methods to access shares from a remote location?

If someone can direct me to already made instructions that would be great, but I'm mainly searching for general directions or some guidelines.

Thank you,

Gab

[João Cardoso]

On Sunday, April 27, 2014 7:46:27 PM UTC+1, Gabriel Paré-Olivier wrote:

Hi,

My overall goal is to access my shares from a remote location with some kind of security and at a good and steady transfer speed. I think setting an SSH tunnel to access he shares is a good way of achieving this goal. I've set a SSH tunnel following this procedure: http://www.nikhef.nl/~janjust/CifsOverSSH/Win8Loopback.html It's working, I'm glad.

The problem is that transfer speed are not very good. On LAN through SMB (normal share) I have 40+ Mbps on both directions (on WiFi, so about 80% of bandwidth). On SSH on LAN (same connection, only difference is that it's through SSH instead of SMB directly), average transfer speeds are about 7 Mbps. CPU load is high but not at 100%. Also transfer speed is oscillating between less than 1 Mbps to about 12 Mbps.

I'm trying to improve this. I've searched a bit, some people improved their performance by using other SSH encryption protocols: http://blog.christophersmart.com/2009/04/04/speed-test-on-the-dns-323/

I've looked the dropbear manual and it really seems to be designed for small computers. I guess someone smarter than me has already figured out what is the most appropriate encryption protocol and all the technical details.

My questions are:

1- Does somebody have much better transfer speeds through SSH than me?

please see this: https://groups.google.com/d/msg/alt-f/HUzuIC2ESWI/j6SOy6g8kBEJ

[Gabriel Paré-Olivier]

Thank you for the fast answer.

I installed OpenSSH in the Alt-F packages, and in the /etc/ssh/ssh_config file I used the command :

Cipher arcfour

Now performance are a bit better. Also I see I'm not the only one with this problem.

Gab