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Template:Networking rutos configuration example l2tp over ipsec android (view source)
Revision as of 10:15, 2 July 2020
, 10:15, 2 July 2020no edit summary
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* At least one Android device
* At least one Android device
The topology above depicts the L2TP/IPsec scheme. - The router with the Public IP address ('''''RUTX11''''') acts as the '''L2TP/IPsec server''' and the '''Android device''' acts as '''client'''. L2TP connects the networks of '''RUTX11''' and '''Android client''', IPsec provides the encryption for the L2TP tunnel. Only LAN traffic is going to go through that tunnel, any other WAN traffic won't go through it. This way the VPN tunnel will not be under a huge load and will provide greater speeds.
The topology above depicts the L2TP/IPsec scheme. The router with the Public IP address ('''RUTX''') acts as the '''L2TP/IPsec server''' and the '''Android device''' acts as '''client'''. L2TP connects the networks of '''RUTX''' and '''Android client''', IPsec provides the encryption for the L2TP tunnel. Created VPN tunnel will allow Android device to reach home network behind the RUTX router, but the rest of Android device network traffic will not be redirected through VPN. This way the VPN tunnel will not be under a huge load and will provide greater speeds.
When the scheme is realized, you will be able to reach your home internal network with all internal systems, cameras, or other IOT devices, from anywhere in the world.
When the scheme is realized, you will be able to log on to your home network from anywhere - work, hotel, car. You will have access to all of your home resources, and your data will still be secure, even if you will be using public WiFi.
==Configuring home router (RUTX)==
==Configuring home router (RUTX)==
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Login to the router's WebUI and navigate to the '''Services → VPN → L2TP''' page and do the following:
Login to the router's WebUI, navigate to the '''Services → VPN → L2TP''' page and do the following:
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<li>Enter a '''custom configuration name'''.</li>
<li>Enter a '''custom configuration name'''.</li>
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<li>'''Enable''' the L2TP instance.</li>
<li>'''Enable''' the L2TP instance.</li>
<li>Enter a '''User name''' and '''Password''' which later will be used for client authentication.</li>
<li>Enter a '''Username''' and '''Password''' which later will be used for client authentication.</li>
<li>Optionaly, set a fixed IP for this client (if left empty, client will receive first free IP from the IP range).</li>
<li>Optionally, set a fixed IP for this client (if left empty, client will receive first free IP from the IP range).</li>
<li>Don't forget to '''Save''' the changes.</li>
<li>Don't forget to '''Save''' the changes.</li>
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<li>Set '''DH group''' to '''MODP1024'''.</li>
<li>Set '''DH group''' to '''MODP1024'''.</li>
<li>Go to '''Phase 2''' settings and also set '''DH group''' to '''MODP1024'''.</li>
<li>Go to '''Phase 2''' settings and also set '''DH group''' to '''MODP1024'''.</li>
<li>'''Save''' changes.</li>
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===Firewall===
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Now go to the '''Network → Firewall → General Settings''' page and press '''Edit''' button next to the L2TP forward rule:
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<li>Set '''Forward: accept'''.</li>
<li>Select '''Covered networks: LAN'''.</li>
<li>'''Save''' changes.</li>
<li>'''Save''' changes.</li>
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<li>Write the '''DNS servers''' you are planning to use (in this example we used google DNS servers).</li>
<li>Write the '''DNS servers''' you are planning to use (in this example we used google DNS servers).</li>
<li>Add '''Forwarding routes''' (RUTX11 LAN network).</li>
<li>Add '''Forwarding routes''' (RUTX LAN network).</li>
<li>'''Save''' settings.</li>
<li>'''Save''' settings.</li>
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Now open your newly created VPN instance and connect to it:
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<li>Write the '''DNS servers''' you are planning to use (in this example we used google DNS servers).</li>
<li>Write the '''Username''' you created in router's L2TP settings.</li>
<li>Add '''Forwarding routes''' (RUTX11 LAN network).</li>
<li>Write the '''Password''' you created in router's L2TP settings.</li>
<li>Press '''Connect'''.</li>
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Now you should be able to access your home network resources.
To verify the connection you can ping some internal HQ server and if you get a reply, you have successfully connected to HQ‘s internal network.
To verify the connection you can try accessing your router's WebUI without being connected to it in any way. If you are able to do that, you have successfully connected to your home network.
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'''Disclaimer:'''
This configuration example was created by using Android version 10. The IPsec '''Phase 1''' and '''Phase 2''' settings, which were used in this configuration example, might not work with other Android versions and might require adjustment.
