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Policy Based Routing (view source)

Revision as of 12:16, 2 July 2024

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==Introduction==

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Policy-based routing (PBR) is a technique used in computer networking to direct network packets based on defined criteria beyond the standard destination-based routing. Unlike traditional routing, which forwards packets solely based on their destination address, PBR allows to customize routing decisions according to various factors.

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==Prerequisites & Topology==

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'''Before proceeding with the confuration, ensure that all requirements are met:'''

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# Before starting you need to have 3 different WAN connections. In this case we are going to use: '''[https://wiki.teltonika-networks.com/view/WiFi_WAN_example Wi-fi WAN]''', '''Wired WAN''' and '''Mobile WAN'''.These interfaces have to be preconfigured.

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[[File:~~PBR11~~.png|border|class=tlt-border|center]]

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[[File:PBR1111.png|border|class=tlt-border|center]]

==Configuration==

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{{Template:Networking_rutos_manual_basic_advanced_webui_disclaimer

| series = RUTX

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===Configuring Policy Based Routing===

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Open WebUI → Network → Routing → Policy based routing → Add new instance and create new instances for each available WAN in this case Wi-Fi WAN, Wired-WAN and Mobile:

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Open '''WebUI → Network → Routing → Policy based routing → Add new instance''' and create new instances for each available WAN in this case Wi-Fi WAN, Wired-WAN and Mobile:

====Creating Wifi Wan Routing Table====

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Add new instance:

# Enter ID: '''1'''

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# Enter New configuration name: '''~~WifiWan~~'''

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# Enter New configuration name: '''WiFiWan'''

[[File:PBR IMAGE WIFI.png|border|class=tlt-border|center|1000x300px]]

click [[File:Add Button.png|40x70px]] in the new window make following changes:

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click [[File:Add Button.png|40x70px]] and aplly this to the route:

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#Select Interface: '''~~WifiWan~~''' | Enter Target: '''0.0.0.0''' | Enter IPv4-Netmask: '''0.0.0.0''' | Enter IPv4-Gateway: '''192.168.1.1 (Note: Use the Wi-Fi network's gateway. The current LAN gateway in use is 192.168.100.1. However, the correct gateway to route correctly will be the next hop address. This means the router gateway providing the Wi-Fi WAN should be used. In my case, this gateway is 192.168.1.1.)'''

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#Select Interface: '''WiFiWan''' | Enter Target: '''0.0.0.0''' | Enter IPv4-Netmask: '''0.0.0.0''' | Enter IPv4-Gateway: '''192.168.1.1 (Note: Use the Wi-Fi network's gateway. The current LAN gateway in use is 192.168.100.1. However, the correct gateway to route correctly will be the next hop address. This means the router gateway providing the Wi-Fi WAN should be used. In my case, this gateway is 192.168.1.1.)'''

[[File:PBR_P_ROUTE_111.png|border|class=tlt-border|center|1000x300px]]

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Add new instance:

# Enter ID: '''5'''

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# Enter New configuration name: '''~~MwWan~~'''

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# Enter New configuration name: '''MWan'''

[[File:PBR_MOBILE_1.png|border|class=tlt-border|center|1000x300px]]

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#Select Interface:'''mob1s1a1''' | Enter Target: ''''0.0.0.0''' | Enter IPv4-Netmask: '''0.0.0.0'''

[[File:PBS_TABLES_WAN.png|border|class=tlt-border|center|1000x300px]]

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====Creating Routing Rules for IPv4====

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Connect end device to physical port that is assingned to different routing policy. Open cmd and run this command: '''tracert 8.8.8.8''', three physical ports that we assigned to diffrent Vlans route to 8.8.8.8 should be using different gateways.

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Connect end device to physical port that is assingned to different routing policy. Open cmd and run this command: '''tracert 8.8.8.8''', three physical ports that we assigned to diffrent Vlans route to 8.8.8.8 should be using different gateways and public addresses visit to check if address changes [https://whatismyipaddress.com/ whatismyipaddress].

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Public IP addresses that are used in my topology:

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# WiFi WAN: '''78.xxx.xxx.xxx'''

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# Wired WAN: '''213.xxx.xxx.xxx'''

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# Mobile WAN: '''84.xxx.xxx.xxx'''

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[[File:Test1.png|border|class=tlt-border|center]]

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[[File:ISP1.png|border|class=tlt-border|center|800x600px]]

====Physical Port 2 Test Result====

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[[File:Test22.png|border|class=tlt-border|center]]

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[[File:ISP2.png|border|class=tlt-border|center|800x600px]]

====Physical Port 3 Test Result====

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[[File:Test33.png|border|class=tlt-border|center]]

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[[File:ISP3.png|border|class=tlt-border|center|800x600px]]

===Policy Based Routing on a single Host===

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====Single Host Routing Topology====

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[[File:~~PBR222~~.png|border|class=tlt-border|center|1000x800px]]

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[[File:PBR22222.png|border|class=tlt-border|center|1000x800px]]

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====Wired WAN Routing Policy Priority Change====

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=====Creating Single Node Routing Table Over WifiWan=====

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Add new instance:

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[[File:POLICY_ROUTE.png|border|class=tlt-border|center]]

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[[File:ISP1.png|border|class=tlt-border|center|800x600px]]

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==External links==

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#https://wiki.teltonika-networks.com/view/Splitting_Network_Traffic_Via_Multiple_Interfaces

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