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