Configure Passive Mode

By default, when CHAP is enabled on an interface, the interface always challenges its peer and responds to challenges from its peer.

You can configure the interface not to challenge its peer, and only respond when challenged. To configure the interface not to challenge its peer, include the passive statement at the [edit interfaces interface-name ppp-options chap] hierarchy level:

[edit interfaces interface-name ppp-options chap]

passive;