SSH connections WITHOUT encryption

el3ktro

This may sound weird, but I'm searching for a way to establish UNencrypted SSH connections (which makes the first 'S' obsolete ;-)

). The reason is: I'm often using X11/SSH connections at home between my girlfriend's iBook and my desktop machine (this is a neat way for my gf to view flash animations while in Linux on her iBook, she can launch Konqueror on my desktop

. I'm afraid that due to the fact that this connection is encrypted, it is slower than it has to be (Flash animations are actually pretty smooth, but sounds lacks a bit sometimes). Also I'm currently using NFS o share files, but I'd prefer SHFS for this simply because I wouldn't need to run portmap+nfsd on both machines, but shfs is pretty slow compared to nfs.

Thanks for your replies!
Tom

nevynxxx · Posted: Tue Dec 20, 2005 4:54 pm Post subject:

Loose the ssh entirely??

X11 is itself a network protocol. People only use ssh for the secuity of an encrypted connection.

On the other hand, I wouldn't expect the encryption to even register on a modern computer, sshd is currently using 1% of the cpu on my 400MHz server at home, and 0.0% on my server at work that has a VNC X session running (VNC is using 0.3% and thats on a 1.4GHz Petium 4)
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toralf · Posted: Tue Dec 20, 2005 5:02 pm Post subject:

Use telnet and export DISPLAY variable ?

Jrauch · n00b Joined: 19 Dec 2005 Posts: 20

Try high performance ssh, they have a patch that uses no encryption after the conection is established.
That patch isn't in portage, but it's easy to copy the existing ebuild and make it happen.

http://www.psc.edu/networking/projects/hpn-ssh/

oh, and it's the hpn use flag, if you didn't get that from the project name.

allucid · Veteran Joined: 02 Nov 2002 Posts: 1314 Location: atlanta

You can't disable encryption with ssh (at least not without a patch). You can use a faster cipher though -- such as blowfish. It shouldn't make much of a noticable difference on a modern compter, though.

Catch-22 · Apprentice Joined: 22 Oct 2004 Posts: 244

Most people here are talking about cpu load but what about network load?
I think I remember my old g3 laptop managing 700KB/s via ftp but 500KB/s via scp
I'm no expert but I would've thought that there would be (a bit) more overhead with a secure transfer. I have no idea how much overhead it would be.

nevynxxx

el3ktro · Posted: Wed Dec 21, 2005 10:27 am Post subject:

Thanks for your answers so far. Well I tried it again, I launched the Konqueror installed on the desktop via SSH on the iBook, and opened a website with a flash movie, and top showed that on the desktop machine, ssh would go up to something like 30%. This is on an AMD64 3000+. How exactly would I have to do this with telnet? Is there a way to do this without SSH/Telnet etc. at all?

Tom

I have a 100MBit LAN btw.

ruben · Guru Joined: 04 Jul 2003 Posts: 462