What is the purpose of creating PPP secrets when configuring L2TP/IPsec VPN on MikroTik?

• A. To authenticate remote VPN clients
• B. To assign IP addresses to LAN devices
• C. To configure NAT rules
• D. To enable bridging

Answer: (A)

PPP secrets store the credentials that remote VPN users must provide to prove who they are when starting a PPP session over the L2TP tunnel. When a client connects, MikroTik checks the supplied username and password against the PPP secret entry. If they match, authentication succeeds and the VPN session is allowed to establish, with the client typically receiving an IP address from a pool or a specific remote address you’ve assigned. This authentication step is separate from IPsec’s encryption of the tunnel, and it’s not used to assign LAN device addresses, configure NAT rules, or enable bridging.