setup-internet-on-henn-ltsp.md

Configure internet on existing HeNN LTSP systems

Collect following variables from the main LTSP server's /etc/ltsp/dhcpd.conf .

• client_ip_range
• dns_server
• broadcast_address
• routers
• subnet_mask

For example, if the file has contents something like this:

authoritative;

subnet 192.168.0.0 netmask 255.255.255.0 {
  range 192.168.0.20 192.168.0.250;
  option domain-name "example.com";   
  option domain-name-servers 192.168.0.1;
  option broadcast-address 192.168.0.255;
  option routers 192.168.0.1;
  option subnet-mask 255.255.255.0;

  filename "/ltsp/pxelinux.0";
  option root-path "/opt/ltsp/i386";
}

our values will be:

• client_ip_range 192.168.0.20 192.168.0.250
• dns_server 192.168.0.1
• broadcast_address 192.168.0.255
• routers 192.168.0.1
• subnet_mask 255.255.255.0

While following steps mentioned below, use these collected values or change them if mentioned.

Steps

• Disable DHCP on router connected to the internet
• Set router's primary IP/router IP to any IP address not in client_ip_range and not broadcast_address. You can reduce the client_ip_range to, for eg, 192.168.0.20 192.168.0.150 and set router's IP to 192.168.0.151 as like in this file's case.
• In etc/ltsp/dhcpd.conf, replace routers with the IP you set for the router in the earlier step.
• Replace dns_server with 8.8.8.8 8.8.4.4
• Connect a LAN cable from one of the router's LAN port to an empty port in the switch.
• Restart the server and reboot all clients.
• Enjoy!!!

My final configuration will now look like:

authoritative;

subnet 192.168.0.0 netmask 255.255.255.0 {
  range 192.168.0.20 192.168.0.150;
  option domain-name "example.com";   
  option domain-name-servers 8.8.8.8 8.8.4.4;
  option broadcast-address 192.168.0.255;
  option routers 192.168.0.151;
  option subnet-mask 255.255.255.0;

  filename "/ltsp/pxelinux.0";
  option root-path "/opt/ltsp/i386";
}