pppoeconf修改文件查询及手动PPPoE配置需求咨询

Awesome question! If you’ve used pppoeconf to set up a working PPPoE connection and want to replicate that manually, knowing which files it modifies is key. Let’s walk through each one in detail—these are the core files you’ll need to tweak on Debian/Ubuntu-based systems:

• /etc/ppp/peers/dsl-provider
  This is the main configuration file for your PPPoE connection. pppoeconf populates it with all the critical settings: your ISP’s access point name (APN), authentication method, whether to set a default route, DNS server preferences, and more. It’s essentially the blueprint for how your system establishes the PPPoE link.

• /etc/ppp/pap-secrets or /etc/ppp/chap-secrets
  These are the authentication credential files—pppoeconf will add your PPP username and password to whichever one matches your ISP’s authentication protocol (PAP or CHAP). The entry follows the format:

  your_username * your_password *
  

  This lets the PPP daemon authenticate with your ISP correctly.

• /etc/network/interfaces
  The system’s network interface config gets updated here too. pppoeconf adds a block for the PPPoE interface, usually looking like this:

  auto dsl-provider
  iface dsl-provider inet ppp
  provider dsl-provider
  

  It also typically sets your underlying Ethernet interface (e.g., eth0, enp0s3) to manual mode to prevent conflicts with the PPPoE connection.

• /etc/resolv.conf (or systemd-resolved configurations)
  If your ISP provides DNS servers, pppoeconf will add those addresses to /etc/resolv.conf (or configure systemd-resolved to use them if your system uses that service). This ensures your system can resolve domain names once the PPPoE link is up.

• /etc/ppp/options
  This is the global options file for the PPP daemon. pppoeconf might add a few general settings here—like disabling IPv6 if you don’t need it, or setting connection timeouts—but changes here are minimal compared to the other files.

If you want to set this up manually later, just replicate the content in these files, then start the connection with pon dsl-provider (and stop it with poff dsl-provider). You can also restart the network service to apply permanent changes.

内容的提问来源于stack exchange，提问作者user3450548