Re: how tunnel X11 to a slow system?

From: Andre Charbonneau (andre.charbonneau_at_nrc.ca)
Date: 09/12/03 

Date: Fri, 12 Sep 2003 09:12:15 -0400

Thanks for the advice.

I did try the -C option, with no significant improvement in performance.

I also did try a faster cipher, like blowfish... same thing.

The reason why I suspect that is not related to network speed is that as
soon as I don't tunnel X11 then everything becomes much faster. I
beleive this rules out the network speed issue, unless the encrypting
adds a lot to the original data.

B is a Mips r5000 180 Mhz with 512M of ram, running OpenSSH_3.0.1p1. I
would think that 180Mhz would be enough to handle the SSH encryption but
the more testing I do, the more it looks like a CPU issue.

Thanks for the feedback,
Andre.

tyler wrote:
> Before you try some confusing scenario, try running SSH on system B
> with the -C option. This will compress the data before it is sent
> back.
>
> Also realize that X apps can be very network intensive and the speed
> of your network can be the limiting factor here.
>
> You may say, but we have a 100 MB network on a GB backbone. That may
> be true, but your network guys may be limiting your port to 10 MB,
> slowing you down.
>

Relevant Pages

  • Re: [PATCH] [Request for inclusion] Filesystem in Userspace
    ... > of writable pages assigned to FUSE filesystems. ... Limiting this should ... > solve the deadlock problem. ... However, when receiving the ACK network packets from the server, ...
    (Linux-Kernel)
  • Re: Blaster Worm.. Please help
    ... Select the advanced tab -> Enable "Protect my computer and network by ... limiting or preventing access to this computer from the internet" ...
    (microsoft.public.security.virus)
  • Re: Issues with a Large Fat pipe Network simulation
    ... > When testing without any extra delay on 'network' and send/recvspaces of ... > 'network' may be the limiting factor here. ...
    (freebsd-net)
  • Re: how tunnel X11 to a slow system?
    ... Before you try some confusing scenario, try running SSH on system B ... This will compress the data before it is sent ... Also realize that X apps can be very network intensive and the speed ... be true, but your network guys may be limiting your port to 10 MB, ...
    (comp.security.ssh)