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Max numer of connections per sshd

 
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Old 12-20-2007
Max numer of connections per sshd
Hi people,


How many ssh or scp connections will an sshd process allow to conenct?

I'm hoping this is an easy question.

Linux 2.6.16.21-0.8-smp x86_64 GNU/Linux

I have a Linux server that has spawned 34 sshd processes, thought this doesn't seem to be enough. The server is used for application monitoring and as a result will have a large number of connections made each minute. We now have got to a point where it will not allow new connections.

You either get the "Welcome" message and no prompt or ssh_exchange_identification: Connection closed by remote host


cheers,

Neil
 
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LEARN ABOUT REDHAT

ssh-keysign

SSH-KEYSIGN(8)						    BSD System Manager's Manual 					    SSH-KEYSIGN(8)

NAME

     ssh-keysign -- ssh helper program for hostbased authentication

SYNOPSIS

     ssh-keysign

DESCRIPTION

     ssh-keysign is used by ssh(1) to access the local host keys and generate the digital signature required during hostbased authentication with
     SSH protocol version 2.

     ssh-keysign is disabled by default and can only be enabled in the the global client configuration file /etc/ssh/ssh_config by setting
     HostbasedAuthentication to ``yes''.

     ssh-keysign is not intended to be invoked by the user, but from ssh(1).  See ssh(1) and sshd(8) for more information about hostbased authen-
     tication.

FILES

     /etc/ssh/ssh_config
	     Controls whether ssh-keysign is enabled.

     /etc/ssh/ssh_host_dsa_key, /etc/ssh/ssh_host_rsa_key
	     These files contain the private parts of the host keys used to generate the digital signature.  They should be owned by root, read-
	     able only by root, and not accessible to others.  Since they are readable only by root, ssh-keysign must be set-uid root if hostbased
	     authentication is used.

SEE ALSO

     ssh(1), ssh-keygen(1), ssh_config(5), sshd(8)

AUTHORS

     Markus Friedl <markus@openbsd.org>

HISTORY

     ssh-keysign first appeared in OpenBSD 3.2.

BSD
								   May 24, 2002 							       BSD