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Top Forums UNIX for Advanced & Expert Users Max numer of connections per sshd Post 302152558 by nhatch on Thursday 20th of December 2007 08:17:12 AM
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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SSH-COPY-ID(1)						      General Commands Manual						    SSH-COPY-ID(1)

NAME
ssh-copy-id - install your public key in a remote machine's authorized_keys SYNOPSIS
ssh-copy-id [-i [identity_file]] [user@]machine DESCRIPTION
ssh-copy-id is a script that uses ssh to log into a remote machine and append the indicated identity file to that machine's ~/.ssh/autho- rized_keys file. If the -i option is given then the identity file (defaults to ~/.ssh/id_rsa.pub) is used, regardless of whether there are any keys in your ssh-agent. Otherwise, if this: ssh-add -L provides any output, it uses that in preference to the identity file. If the -i option is used, or the ssh-add produced no output, then it uses the contents of the identity file. Once it has one or more fin- gerprints (by whatever means) it uses ssh to append them to ~/.ssh/authorized_keys on the remote machine (creating the file, and directory, if necessary.) NOTES
This program does not modify the permissions of any pre-existing files or directories. Therefore, if the remote sshd has StrictModes set in its configuration, then the user's home, ~/.ssh folder, and ~/.ssh/authorized_keys file may need to have group writability disabled manu- ally, e.g. via chmod go-w ~ ~/.ssh ~/.ssh/authorized_keys on the remote machine. SEE ALSO
ssh(1), ssh-agent(1), sshd(8) OpenSSH 14 November 1999 SSH-COPY-ID(1)
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