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How to Configure PPPoE on OPNsense

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See the OPNsense configuration series .

  • Log in to OPNsense at https://192.168.1.1 with the configured administrator credentials.
  • Open Interfaces > WAN. Leave fields not listed below at their defaults.
FieldSelectionNotes
IPv4 Configuration typePPPoE
IPv6 Configuration typeDHCPv6Select None if IPv6 is not used; the correct value depends on the ISP.
UsernameISP-provided PPPoE username
PasswordISP-provided PPPoE password
 Screenshots

Generic configuration:

OPNsense WAN interface overview

PPPoE configuration:

OPNsense PPPoE configuration

For Viettel IPv6, use DHCPv6 and configure:

FieldValue
Configuration modeBasic
Request only an IPv6 prefixChecked
Prefix delegation size64
Send IPv6 prefix hintChecked
Use IPv4 connectivityChecked
VLAN priorityDisabled
 Screenshot
IPv6 configuration

Click Save, then open Interfaces > Overview and select the WAN interface. A successful PPPoE connection should show the gateway and IPv4/IPv6 addresses.

 Screenshot
WAN interface overview

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