SSH connection drops after 2 to 3 hours with write:failed, broken pipe error

Hello everyone

I am using ssh to login to a linux box from my Mac. Please see below some info:

System Version: OS X 10.9.1 (13B42)
Kernel Version: Darwin 13.0.0
Boot Volume: Macintosh HD
Boot Mode: Normal

This is how my ssh_config file looks like:

Host *
SendEnv LANG LC_*
ServerAliveInterval 30
ForwardX11Timeout 1D
# ForwardAgent no
# ForwardX11 no
# RhostsRSAAuthentication no
# RSAAuthentication yes
# PasswordAuthentication yes
# HostbasedAuthentication no
# GSSAPIAuthentication no
# GSSAPIDelegateCredentials no
# GSSAPIKeyExchange no
# GSSAPITrustDNS no
# BatchMode no
# CheckHostIP yes
# AddressFamily any
# ConnectTimeout 0
# StrictHostKeyChecking ask
# IdentityFile ~/.ssh/identity
# IdentityFile ~/.ssh/id_rsa
# IdentityFile ~/.ssh/id_dsa
# Port 22
# Protocol 2,1
# Cipher 3des
# Ciphers aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc
# MACs hmac-md5,hmac-sha1,[email protected],hmac-ripemd160
# EscapeChar ~
# Tunnel no
# TunnelDevice anyny
# PermitLocalCommand no
# VisualHostKey no
# ProxyCommand ssh -q -W %h:%p gateway.example.com

# XAuthLocation added by XQuartz (http://xquartz.macosforge.org)
Host *
XAuthLocation /opt/X11/bin/xauth
ServerAliveInterval 30

Is there anything else I need to add to it?

The serverAliveInterval is set to 30 which means that every 30 seconds my mac is sending null packets to the remote machine in order to keep the connection alive. Why it drops after a few hours is a mystery to me.
The error I get is:

Write failed: Broken Pipe.

If anyone has any suggestions please let me know.

Many thanks.

Is it the server timing out? It's possible that the error is actually on the other side. How is SSH configured on the Linux box?

Hello

I have another ssh connection from another mac to the same server for more than a day and it is still alive. So I don't think is the server side. Other mac users are connecting to the same server with no problems.
However please see below the sshd_config on the server:

Although I'm not confident that this is a configuration issue, have you tried copying a ssh_config from a working machine to this Mac?

Maybe this discussion will help? https://bbs.archlinux.org/viewtopic.php?id=97003

Thanks cradom

I did come across the link you posted but didn't make any difference for me.
I will try copying an ssh_config from the working mac to the "problematic" one as suggested and see if it makes a difference. The user at the moment is sshing to another server and from there logs in (ssh) to the server that drops the connection after a while.