====TCP/IP====
[[userguide:servermanagement|Server Management]] > [[userguide:servermanagement:systemsettings|System Settings]] > TCP/IP

The server's TCP/IP network settings can be modified from this page.  In addition, clicking on the [[userguide:network:routes|Modify Static Routes]] button allows the administrator to create static routes from this server appliance to other subnets.

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  * **Hostname**: Enter the host name of this server appliance. The host name and the domain name combined together should uniquely identify this server appliance. Please enter only lowercase alphanumeric characters, dashes or periods. For example, "www", "server" or "blueonyx1" are valid entries. 
  * **Domain Name**: Enter the domain name of this server appliance. The host name and the domain name combined together should uniquely identify this server appliance. Please enter only lowercase alphanumeric characters, dashes or periods. The first character must be a letter, and the last character must be either a letter or number. For example, example.com is a valid entry. 

**NOTE** Do not enter a hostname for the server that is identical to the hostname of a Virtual Site that you will be hosting on the server.   For example, if you plan to host "www.foo.com" on the server, that should be the name of a __site__ and **NOT** the server.  Choose a different hostname for the server, such as "server1".

  * **DNS Servers**: Enter the IP address or addresses of your local domain name server or servers as provided to you by your ISP. A domain name server translates textual host names and domain names into numerical IP addresses, and vice-versa. Please enter a series of four numbers between 0 and 255 separated by periods. For example, 192.168.1.1 is a valid entry. Leaving this field empty will prevent this machine from finding other machines by hostname or domain name and will cause networking difficulties. 

  * **Server Gateway**: Enter the IP address of the local network gateway for this server appliance. This is the gateway for both the primary and secondary interfaces. A network gateway allows your server to connect to the world outside of your local network area. Please enter a series of four numbers between 0 and 255 separated by periods. For example, 192.168.1.1 is a valid entry.