Greetings; I put the following in my sshd_config file believing that any session would time out in 2 minutes if the server could not communicate with the client. ClientAliveCountMax 8 ClientAliveInterval 15 However I found that if the server continually attempts to send some data to the client this does not work. The connection stays up for hours. I started sshd with the -d -d -d switches to collect some trace. I looked in the trace for the entry that shows the heartbeat msg being sent to the client but it does not appear in the trace: debug2: channel 0: request keepalive@xxxxxxxxxxx << I never see trace entry this for this scenario [ to break the connection I pull the ethernet cable between the network switch and the SSH Client workstation] [ to create some continuous traffic to send I execute the command "ping localhost" ] Otherwise the ClientAlive mechanism seems to work : I found that if there is a period of 15 minutes with NO activity and the client is connected the trace shows: debug2: channel 0: request keepalive@xxxxxxxxxxx debug1: Got 100/13 for keepalive If the server is not attempting to send data to the client and I pull the cable between the network switch and the client I get a timeout after 2 minutes as expected: debug2: channel 0: request keepalive@xxxxxxxxxxx debug2: channel 0: request keepalive@xxxxxxxxxxx debug2: channel 0: request keepalive@xxxxxxxxxxx debug2: channel 0: request keepalive@xxxxxxxxxxx debug2: channel 0: request keepalive@xxxxxxxxxxx debug2: channel 0: request keepalive@xxxxxxxxxxx debug2: channel 0: request keepalive@xxxxxxxxxxx debug2: channel 0: request keepalive@xxxxxxxxxxx Disconnecting: Timeout, your session not responding. debug3: channel 0: close_fds r 9 w 9 e 11 debug1: do_cleanup debug1: PAM: cleanup debug3: PAM: sshpam_thread_cleanup entering Any suggestions? OpenSSH level: SSH-2.0-OpenSSH_3.8p1 Distro SuSe SLES 9.3 Thanks, Rick blasiak@xxxxxxxxxx
