| LTSP Specific ports | ||
|---|---|---|
| Port | Type | Description |
| 9100 - 9102 | TCP | Printers, served by lp_server |
| 9200 | TCP | ltspinfo - used for querying info from the client |
| 9202 | TCP | lbuscd - running on thin client, waiting for a session to connect up and register |
| 9210 | TCP | Default port for ltspswapd (NBD Swap Server) |
| Standard services | ||
| 67 | UDP | DHCP (dhcpd listens on this port for DHCP Requests from clients) |
| 68 | UDP | DHCP (dhcpd sends replies to the client at this port) |
| 69 | UDP | TFTP (client connects to port 69 on the server to download the kernel) |
| 111 | UDP/TCP | Portmapper |
| 177 | UDP | XDMCP (XDM,GDM,KDM) |
| 1067 | UDP | Commonly used as an alternate for DHCP-67 |
| 1068 | UDP | Commonly used as an alternate for DHCP-68 |
| 6000 | TCP | X Protocol uses this port for connecting client apps with the Xserver |