[CentOS] sofware caused connection abort

[John R Pierce]

Gergely Buday wrote:
> Hi there,
>
> some of my users use putty to connect to my server via ssh protocol.
> After some time they get the above error message, and it could be that
> my CentOS-side configuration caused this. Do anybody has experience
> with this problem?
>   

it could be a lot of things, including a NAT router's session tracking 
timing out on an idle session.

in their putty configuration, enable 'tcp keep-alives', this is on 
'connections', also set the keepalive timer to like 30 seconds.