Delays in ssh connections between two local Linux computers

[Ram-on Agmon]

You might have a problem with the dns resolution. Add the ip of both the
machine to both /etc/hosts or disable the dns options in the sshd config.

Ram on

On Mon, Sep 12, 2011 at 5:34 PM, Shlomi Fish <shlomif at gmail.com> wrote:

> Hi Kfir,
>
> On Mon, Sep 12, 2011 at 5:25 PM, Kfir Lavi <lavi.kfir at gmail.com> wrote:
> >
> >
> > On Mon, Sep 12, 2011 at 4:37 PM, Shlomi Fish <shlomif at gmail.com> wrote:
> >>
> >> Hi all,
> >>
> >> (I apologise from writing from my gmail.com account, but as you'll see
> >> below,
> >> writing from my home E-mail account is not bearable.).
> >>
> >> I have a desktop x86-64 Core i3 machine (running Mageia Linux 1) that
> >> connects
> >> via wired Ethernet to my NAT/router and there is a remote x86-64 Core
> Duo
> >> laptop (running Mageia Linux 2), connected via wireless. Often when I
> type
> >> commands on bash on the remote laptop via ssh, there is a significant
> >> delay,
> >> and moreover running claws-mail or gringotts (two fast gtk+ apps) from
> the
> >> laptop are slow, which hadn't been the case with my older desktop
> machine.
> >> tcpdump -i wlan0 on the laptop and htop on the laptop show nothing that
> >> might
> >> cause it.
> >>
> >> The delays in the connectivity were not bad with the previous desktop
> >> machine
> >> which was an old Pentium 4 2.4GHz machine, which was much slower and
> >> underpowered.
> >>
> >> So far I tried:
> >>
> >> 1. Doing /etc/init.d/iptables stop on the desktop machine.
> >>
> >> 2. Relocating the laptop closer to the wifi NAT/router.
> >>
> >> Neither of those helped.
> >>
> >> Can anyone shed any light on this?
> >>
> >> Regards,
> >>
> >> -- Shlomi Fish
> >>
> >>
> >> --
> >> ------------------------------------------
> >> Shlomi Fish http://www.shlomifish.org/
> >>
> >> Electrical Engineering studies. In the Technion. Been there. Done
> >> that. Forgot a lot. Remember too much.
> >>
> >> _______________________________________________
> >> Linux-il mailing list
> >> Linux-il at cs.huji.ac.il
> >> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
> >
> > Hi Shlomi,
> > You need to edit 2 files:
> > 1. edit /etc/ssh/sshd_config and add the line 'UseDNS no'
> > 2. edit /etc/nsswitch.conf and make sure the line:
> >  'hosts:          files dns'
> > have just the 'files' and 'dns'. delete everything else from this line.
> >
> > This will make ssh instant!
> >
>
> Thanks for your advice. I added these suggestions on both hosts and
> restarted sshd but I'm still getting the delays in typing the bash
> commands on ssh and gringotts is still slow.
>
> Regards,
>
> -- Shlomi Fish
>
> > Kfir
> >
> >
>
>
>
> --
> ------------------------------------------
> Shlomi Fish http://www.shlomifish.org/
>
> Electrical Engineering studies. In the Technion. Been there. Done
> that. Forgot a lot. Remember too much.
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
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