Sometimes my SSH session disconnects with a Write failed: Broken pipe message. What does it mean? And how can I keep my session open?
It’s possible that your server closes connections that are idle for too long. You can update either your client (ServerAliveInterval) or your server (ClientAliveInterval).
ServerAliveInterval Sets a timeout interval in seconds after which if no data has been
received from the server, ssh(1) will send a message through the encrypted channel to request
a response from the server.
The default is 0, indicating that these messages will not be sent to the server.
This option applies to protocol version 2 only.
ClientAliveInterval Sets a timeout interval in seconds after which if no data has been received
from the client, sshd(8) will send a message through the encrypted channel to request a response
from the client.
The default is 0, indicating that these messages will not be sent to the client.
This option applies to protocol version 2 only. To update your server (and restart your sshd)
echo "ClientAliveInterval 60" | sudo tee -a /etc/ssh/sshd_config Or client-side:
echo "ServerAliveInterval 60" >> ~/.ssh/config Although you have configured all the above parameters, sometimes the connection just breaks. To solve this problem, I wrote this shell script to automatically restart ssh as soon as it breaks down.
#!/bin/sh
#This is an SSH-D proxy with auto-reconnect on disconnect
#Created by Liang Sun on 28, Sep, 2011
#Email: i@liangsun.org
i=0
while test 1==1
do
remote_ip=YOUR_REMOTE_IP
remote_user=YOUR_REMOTE_USER
exist=`ps aux | grep $remote_user@$remote_ip | grep 9090`
#echo $exist
if test -n "$exist"
then
if test $i -eq 0
then
echo "I'm alive since $(date)"
fi
i=1
else
i=0
echo "I died... God is bringing me back..."
ssh $remote_user@$remote_ip -f -N -D 0.0.0.0:9090
fi
sleep 1
done
(Replace YOUR_REMOTE_USER and YOUR_REMOTE_IP with the username and ip address of your remote server correspondingly.)
If you want to connect to your remote machine via SSH without a password, go to http://liangsun.org/2011/11/ssh-login-without-password/
network’unstability may also cause this problem
Network’s instability may also cause the problem
Network’s instability may also cause the problem.
Hope comment successfully this time.
Yeah, you are right. I have added a script to automatically restart the ssh session.
where i need to place the script that you just make??
Place it into a file, then run the file with sh.
If you name the file proxy.sh, then you can run this command:
sh proxy.shPlease could you tell me how exactly do I use this script: i run it in console, but does this mean that whenever my ssh connection in other console window breaks, it recoonects it automatically without entering password, am I correct?
You need to run this script in back end. If you use Linux, just append a & sign after the script.
You need to configure something to connect your host without entering password, as described in this article: http://liangsun.org/2011/11/ssh-login-without-password/
I think that one can alternatively use autossh (“autossh is a program to start a copy of ssh and monitor it, restarting it as necessary should it die or stop passing traffic.”) and add it to crontab.
script did not help me. I have successfully configured a script to connect to host without a password. But it fails after an idle time. While running the proxy script, I get the first echo message ‘I’m alive’. But the second one ‘I died’ is not getting displayed after the idle time. Does it have anything to do witht he 9090?
The message ‘I died’ is not intended for displaying after the idle time, instead it will display when the connection is broken and the ssh process exits.
Do you use another port instead of 9090? If yes, you need to alter the port in this line:
exist=`ps aux | grep $remote_user@$remote_ip | grep 9090`