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→DHCP Server
{{Template: webui_network_lan_dhcp_summary}}
{{Template: webui_network_lan_dhcp_summary}}
===General===
===General Setup===
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{{Template: webui_network_lan_dhcp_general_setup}}
{{Template: webui_network_lan_dhcp_general_setup}}
[[File:Network lan dhcpserver general.PNG]]
[[File:Networking_rut_manual_lan_dhcp_server_advanced_settings.png|border|class=tlt-border]]
<table class="nd-mantable">
<table class="nd-mantable">
<tr>
<tr>
<th>field name</th>
<th>Field</th>
<th>value</th>
<th>Value</th>
<th>description</th>
<th>Description</th>
</tr>
</tr>
<tr>
<tr>
<td>DHCP</td>
<td>DHCP</td>
<td>Enable {{!}} Disable {{!}} DHCP Relay; Default: '''Enable'''</td>
<td>Enable | Disable | DHCP Relay; default: <b>Enable</b></td>
<td>Enables or disables DHCP Server. If DHCP Relay is selected, you will be prompted to enter an IP address of another DHCP server in your LAN. In this case, Whenever a new device connects to the router, the router will redirect any DHCP requests to the specified DHCP Server</td>
<td>Enables or disables DHCP Server. If DHCP Relay is selected, you will be prompted to enter an IP address of another DHCP server in your LAN. In this case, Whenever a new device connects to the router, the router will redirect any DHCP requests to the specified DHCP Server.</td>
</tr>
</tr>
<tr>
<tr>
<td>Start</td>
<td>Start</td>
<td>integer [1..253]; Default: '''100'''</td>
<td>integer [1..253]; default: <b>100</b></td>
<td>The starting IP address value. e.g., if your router’s LAN IP is 192.168.2.1 and your subnet mask is 255.255.255.0 that means that in your network a valid IP address has to be in the range of [192.168.2.0..192.168.2.254] (192.168.2.255 is a special unavailable address). If the Start value is set to 100 then the DHCP server will only lease out addresses starting from 192.168.2.100</td>
<td>The starting IP address value. e.g., if your router’s LAN IP is 192.168.2.1 and your subnet mask is 255.255.255.0 that means that in your network a valid IP address has to be in the range of [192.168.2.0..192.168.2.254] (192.168.2.255 is a special unavailable address). If the Start value is set to 100 then the DHCP server will only lease out addresses starting from 192.168.2.100.</td>
</tr>
</tr>
<tr>
<tr>
<td>Limit</td>
<td>Limit</td>
<td>integer [1..4294967296]; Default: '''150'''</td>
<td>integer [1..4294967296]; default: <b>150</b></td>
<td>How many addresses the DHCP server can lease out. Continuing from the above example: if the start address is 192.168.2.100 and the server can lease out 150 (default limit value), availabe addresses will be from 192.168.2.100 to 192.168.2.249 (100 + 150 – 1 = 249; this is because the first address is inclusive)</td>
<td>How many addresses the DHCP server can lease out. Continuing from the above example: if the start address is 192.168.2.100 and the server can lease out 150 (default limit value), available addresses will be from 192.168.2.100 to 192.168.2.249 (100 + 150 – 1 = 249; this is because the first address is inclusive).</td>
</tr>
</tr>
<tr>
<tr>
<td>Lease time</td>
<td>Lease time</td>
<td>time in 'h' (hours) or 'm' (minutes); Default: '''12h'''</td>
<td>time in 'h' (hours) or 'm' (minutes); default: <b>12 Hours</b></td>
<td>he duration of an IP lease. Leased out addresses will expire after the amount of time specified in this field and the device that was using the lease will have to request a new DHCP lease. However, if the device stays connected, its lease will be renewed after half of the specified amount of time passes, e.g., if the lease time is 12 hours, then every 6 hours the device will send a request to the DHCP server asking to renew its lease<br>
<td>he duration of an IP lease. Leased out addresses will expire after the amount of time specified in this field and the device that was using the lease will have to request a new DHCP lease. However, if the device stays connected, its lease will be renewed after half of the specified amount of time passes, e.g., if the lease time is 12 hours, then every 6 hours the device will send a request to the DHCP server asking to renew its lease<br>
Lease time can be set in '''hours''' ('''h''') or '''minutes''' ('''m'''). The minimal amount of time that can be specified is '''2min''' ('''2m''')</td>
Lease time can be set in hours (h) or minutes (m). The minimal amount of time that can be specified is 2 minutes (2m).</td>
</tr>
</tr>
</table>
</table>
<table class="nd-mantable">
<table class="nd-mantable">
<tr>
<tr>
<th>field name</th>
<th>Field</th>
<th>value</th>
<th>Value</th>
<th>description</th>
<th>Description</th>
</tr>
</tr>
<tr>
<tr>
<td>Dynamic DHCP</td>
<td>Dynamic DHCP</td>
<td>yes | no; Default: '''yes'''</td>
<td>yes | no; default: <b>yes</b></td>
<td>Enables Dynamic allocation of client addresses. If this is disabled, only clients that have static IP leases will be served</td>
<td>Enables Dynamic allocation of client addresses. If this is disabled, only clients that have static IP leases will be served.</td>
</tr>
</tr>
<tr>
<tr>
<td>Enable DNS rebind protection</td>
<td>Enable DNS rebind protection</td>
<td>yes | no; Default: '''yes'''</td>
<td>yes | no; default: <b>yes</b></td>
<td>Enables DNS rebind attack protection by discarding upstream RFC1918 responses (leave default unless necessary otherwise)</td>
<td>Enables DNS rebind attack protection by discarding upstream RFC1918 responses (leave default unless necessary otherwise)b</td>
</tr>
</tr>
<tr>
<tr>
<td>Force</td>
<td>Force</td>
<td>yes | no; Default: '''no'''</td>
<td>yes | no; default: <b>no</b></td>
<td>The DHCP force function ensures that the router will always start it’s DHCP server, even if there is another DHCP server already running in the router’s network. By default the router’s DHCP server will not start when it is connected to a network segment that already has a working DHCP server</td>
<td>The DHCP force function ensures that the router will always start it’s DHCP server, even if there is another DHCP server already running in the router’s network. By default the router’s DHCP server will not start when it is connected to a network segment that already has a working DHCP serverb</td>
</tr>
</tr>
<tr>
<tr>
<td>IP netmask</td>
<td>IP netmask</td>
<td>ip; Default: '''255.255.255.0'''</td>
<td>ip; default: <b>255.255.255.0</b></td>
<td>Overrides your LAN netmask, thus making the DHCP server think that it’s serving a larger or smaller network than it actually is</td>
<td>Overrides your LAN netmask, thus making the DHCP server think that it’s serving a larger or smaller network than it actually isb</td>
</tr>
</tr>
<tr>
<tr>
<td>DHCP Options</td>
<td>DHCP Options</td>
<td>DHCP options; Default: " "</td>
<td>DHCP options; default: <b>none</b></td>
<td>Additional options to be added to the DHCP server. For example with '26,1470' or 'option:mtu, 1470' you can assign an MTU value per DHCP. You can find more information on DHCP Options [https://technet.microsoft.com/en-us/library/cc958941.aspx here] <br> You can add more options by clicking the plus symbol ([[Image:Services sms gateway auto reply plus symbol.PNG]]) located next to the field</td>
<td>Additional options to be added to the DHCP server. For example with '26,1470' or 'option:mtu, 1470' you can assign an MTU value per DHCP. You can find more information on DHCP Options [https://technet.microsoft.com/en-us/library/cc958941.aspx here] <br> You can add more options by clicking the plus symbol ([[Image:Services sms gateway auto reply plus symbol.PNG]]) located next to the field.</td>
</tr>
</tr>
<tr>
<tr>
<td>Force DHCP options</td>
<td>Force DHCP options</td>
<td>yes | no; Default: '''no'''</td>
<td>yes | no; default: <b>no</b></td>
<td>Forces DHCP option to be sent even if its not requested</td>
<td>Forces DHCP option to be sent even if its not requested.</td>
</tr>
</tr>
</table>
</table>
