Example of Increasing SSH Open Files Limit

Note: This will increase the limit of the number of concurrent open files for RedHat System 8 and above, plus Redhat Enterprise ES version 3 and various flavors of Linux.

Sign on as root and perform the following:

1) # vi /etc/security/limits.conf

Add:

* soft nofile 65538

* hard nofile 65538

2) NOTE: Skip this step if you are running CentOS or Fedora.

# vi /etc/pam.d/login

3) Add the line:

session required /lib/security/pam_limits.so

4) NOTE: Skip this step if you are running CentOS or Fedora.

# vi /etc/pam.d/sshd

Add the line:

session required /lib/security/pam_limits.so

5) # vi /etc/ssh/sshd_config

6) Enable:

UsePrivilegeSeparation no

7) # service sshd restart