Re: Dropping SSH connections over the internet

Luis Mondesi said the following on 01/11/2008 10:32 AM:
On Jan 10, 2008 11:02 PM, Alex Janssen <alex@xxxxxxxxxxxx> wrote:

I regularly connect from home to a Linux box hidden behind a router at
work via SSH. Most times it is reliable. Other times the connection
just stops. I guess my packets just stop getting to the server. I can
logon immediately with another shell, so the server appears to be ok.
Some times the second connection will be interrupted as well. Then I
can start a third and so on. Other nights, it is rock solid. I can
transfer files with scp and login multiple times to run a bunch of apps.
Anyone got any ideas? I'd like to know if there is something I could do
about it, within reason.


This happens to me as well. As the previous 2 posters said, SSH is
very resilient. So, it's not SSH. What happens, at least in my case,
is one of two things:

1. the router at my workplace has a timeout and just drops connections
after a while (bad). not even keep alive packets from SSH survive this
timeout. the behavior I see is that my terminal "freezes" and I can't
CTRL-C or anything out of it. I have to close my gnome-terminal window
and reconnect.
2. the line gets congested and the router discards packages like
crazy. this happens to have the same behavior as the last one, except
that if i leave it on long enough, it will reconnect.

The reason I know it's 2 different things is because we use 2
different methods to connect to the same remote network. 1 from home
over public internet (timeout). 2 from one office on one location over
a private T1 going to a different router.

If you find a solution to this, please post it back. Though I believe
the answer is in your middle-man (the router or switches that manage
the connection).

Regards,

I was just logged on to work from home and it stopped communicating
right in the middle of typing a command. That doesn't sound like a
timeout. I looked trhough the work router configuration for any
timeouts. Couldn't find any. Maybe my routers just suck.

I'm running a DLink DI624 wireless router at home and a Zyxel 642 at
work. I have SUA set on the Zyxel to forward ssh requests on a
non-standard port to linux.

Home
Work
laptop -wireless))) DLINK624 -- bridged_dsl_modem -- pots -- Zyxel642 --
switch -- linux

desktop -- DLINK624 ...

Maybe I should get new routers?

Alex

--
Ourwoods.org
I honor my personality flaws, for without them I would have no personality at all. - I.P. Freely (210)


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