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==Introduction==

==Introduction==

'''Relayd''' is a daemon to relay and dynamically redirect incoming connections to a target host. Its main purpose in RUT routers is extending the wireless network. For example, when RUT is in STA (Wireless Station) mode, it can be used to bridge WAN and LAN interfaces to create a larger Wireless network.

'''Relayd''' is a daemon (computer program that runs as a background process) used to relay and dynamically redirect incoming connections to a target host. Its main purpose in RUTxxx routers is to extend the wireless network. For example, when RUTxxx is in STA Wireless Station mode, it can be used to bridge WAN and LAN interfaces to create a larger Wireless network.

This article provides an extensive configuration example of a basic Relayd usage scenario with RUT devices.

This article provides an extensive configuration example of a basic Relayd usage scenario with two RUTxxx devices.

==Configuration overview and prerequisites==

==Configuration overview and prerequisites==

'''Prerequisites''':

'''Prerequisites''':

* Two RUT routers (one of them with an active data connection)

* Two RUTxxx routers (one of them with an active data connection)

* An end device(s) (PC, Laptop, Tablet, Smartphone)

* An end device (PC, Laptop, Tablet, Smartphone)

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'''Configuration scheme''':

'''Configuration scheme''':

[[File:Configuration examples relayd scheme v3.png]]

[[File:Configuration examples relayd scheme v5.png| 1152px ]]  

The scheme depicts two RUT routers - RUT1 and RUT2. RUT1 has access to the Internet through an undefined type of WAN (it can be any). RUT2 acts as a WiFi Station (STA) and gains access to the Internet via RUT1's WiFi Access Point (AP) (SSID: RUT_WiFi). RUT2's DHCP Server is disabled. This is done so that the end devices connected to RUT2 get IP addresses from RUT1's DHCP Server with the help of Relayd.

The scheme depicts two RUTxxx routers - RUT1 and RUT2. RUT1 has access to the Internet through an undefined type of WAN (it can be any). RUT2 acts as a WiFi Station (STA) and gains access to the Internet via RUT1's WiFi Access Point (AP) (SSID: RUT_WiFi). RUT2's DHCP Server is disabled. This is done so that the end devices connected to RUT2 get IP addresses from RUT1's DHCP Server with the help of Relayd.

So in short, this type of configuration connects devices from different networks into a single network, making it possible for the devices to communicate with each other and providing the devices with an Internet connection.

So in short, this type of configuration connects devices from different networks into a single network, making it possible for the devices to communicate with each other while also providing the devices with an Internet connection.

'''NOTE''': the parameters displayed in the scheme above will be used in further examples of this guide. Parameters like LAN IP addresses and WiFi SSID should be chosen in accordance with your own needs.

'''NOTE''': the parameters displayed in the scheme above will be used in further examples of this guide. Parameters like LAN IP addresses and WiFi SSID should be chosen in accordance with your own needs.

* An active DHCP Server

* An active DHCP Server

A WiFi Access Point (AP) and DHCP Server are enabled by default on RUT routers, but if you wish to make changes, you can find the configuration pages of these services by logging in to the router's WebUI and visiting the '''Network → Wireless''' section for WiFi and '''Network → LAN''' for DHCP. For additional information on these pages, visit their respective Manual chapters:

A WiFi Access Point (AP) and DHCP Server are enabled by default on RUTxxx routers, but if you wish to make changes, you can find the configuration pages for these services by logging in to the router's WebUI and visiting the '''Network → Wireless''' section for WiFi and '''Network → LAN''' for DHCP.

 

===RUT2===

===RUT2===

* Enable Relayd and disable DHCP Server

* Enable Relayd and disable DHCP Server

These steps should be taken in the order they are presented in, because if you disable RUT2's DHCP Server first, you may lose access to your router. So let's begin by setting up WiFi WAN.

'''NOTE''': in this case, the steps should be taken in the order they are presented in, because if you disable RUT2's DHCP Server first, you may lose access to your router. So let's begin by setting up WiFi WAN.

====WiFi WAN====

====WiFi WAN====

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To set up WiFi WAN, log in to the router's WebUI and navigate to the '''WAN''' section found under the '''Network tab'''. Choose WiFi as your Main WAN option and click the '''Save''' button. After this, a '''Scan''' button should appear. Click it and it will initiate a scan for nearby WiFi Access Points. Choose RUT1's Access Point and click '''Join network''':

* To set up WiFi WAN, login to the router's WebUI and navigate to the WAN section found under the Network tab ('''Network → WAN'''):

 

[[File:Relayd configuration example how to set up wifi wan part 1 v2.png]]

* Choose WiFi as your Main WAN option and click the "Save" button. After this, a "Scan" button should appear next to the WiFi WAN option. Click it:

 

 

* Once the scan is complete, you will be presented with a list of nearby WiFi Access Points. Locate and choose RUT1's Access Point and click "Join network":

[[File:Relayd configuration example how to set up wifi wan.png]]

[[File:Relayd configuration example how to set up wifi wan part 4 v3.png]]

You can visit the '''[[Wireless#Wireless_Station|Wireless Station]]''' chapter for additional information on WiFi WAN.

You can visit the '''Wireless Station''' chapter of the user manual for additional information on WiFi WAN.

====Relayd and DHCP Server====

====Relayd and DHCP Server====

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Configuration for both DHCP and Relayd takes in the LAN section of the router's WebUI. Simply log in, navigate to the '''LAN''' section which is located under the '''Network'''. In the LAN page set DHCP to '''Disable''', check the '''Enabled relayd''' field and click '''Save''':

* Configuration for both DHCP and Relayd takes place in the LAN section of the router's WebUI. Login and navigate to the LAN section which is located under the Network tab ('''Network → LAN'''):

 

[[File:How to disable dhcp enable relayd part 1 v2.png]]

* In the LAN page set DHCP to "Disable":

 

* Place a check mark next to the "Enable relayd" field and click the "Save" button:

[[File:Relayd configuration example lan configuration.png]]

[[File:How to disable dhcp enable relayd part 3 v2.png]]

==Testing the set up==

==Testing the set up==

If you've taken all of the steps described above, the configuration is done. But as with any other configuration, it is always wise to test the set up in order to make sure that it works properly. To test this set up, log in to any of the routers go to '''Services → CLI'''. Log in with user name: '''root''' and the router's admin password. You should then be able to '''ping''' the other router or any of the end devices that you have connected to either of the two router's. To execute a ping command, type '''ping <devices_ip>''' into the console and press the Enter key:  

If you've taken all of the steps described above, the configuration is done. But as with any other configuration, it is always wise to test the set up in order to make sure that it works properly. To test this particular set up, login to any of the routers go to '''Services → CLI'''. Login with user name: '''root''' and the router's admin password. You should then be able to '''ping''' the other router or any of the end devices that you have connected to either of the two router's. To execute a ping command, type '''ping <devices_ip>''' into the console and press the Enter key:  

[[File:Testing relayd.png]]

[[File:Testing relayd.png]]

The communication between RUT1 and the end devices in either network will work regardless of what RUT2's LAN IP address is.

The communication between RUT1 and the end devices in either network will work regardless of what RUT2's LAN IP address is.