[CentOS] sofware caused connection abort

On 29/03/2008, Morten Nilsen <morten at runsafe.no> wrote:
>  > 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?
>
> I have seen similar problems if ICMP is blocked..
>  On my LAN, putty sessions live forever.

They connect via the internet, could it make a difference? And, how
can I check if ICMP is blocked?

Now I have made a test from Unix machines using ssh (the program), I
did not experience the same problem so it might be with putty and/or
with company firewall/user's ISP.

- Gergely