Directing all VPN traffic through the OpenVPN concentrator


It is necessary for some users to have all their traffic directed through the OpenVPN concentrator. The number one reason for such a configuration is to protect the HTTP traffic over unsecured WiFi (a.k.a. hotspots).


Add to the bottom of the connecting client’s configuration file (typically under /etc/openvpn/clients.d the following line:
push "redirect-gateway"

Installing RHEL from an AIX NIM master


The AIX NIM server allows a very flexible automated installation process to deploy hundreds or AIX nodes as well as LPARs in a matter of hours. It is possible to achieve similar results using the RHEL kickstart system. This article is about a way of automating the RHEL 5 deployment directly from AIX 6.1 NIM.


  • Copy the RHEL 5 DVD to an NFS file system. E.g. /nfs/rhel5
  • Configure the NIM server to offer the correct boot image in /etc/bootptab:
  • Configure TFTP on the NIM server in /etc/tftpaccess.ctl:

    # NIM access for network boot
  • Restart TFTP and reload INETD:

    stopsrc -s tftpd
    startsrc -a -n -s tftpd
    refresh -s inetd
  • Boot the network client with SMS: remote ip setup (with client ip, server ip, router ip, subnet mask, ping test), multiboot setup (with ethernet as first boot device)
  • Follow the regular RHEL install process. (This is where you can get kickstart going.)
  • Reboot the system and reset the boot order.