services.strongswan-swanctl.swanctl.connections.<name>.dpd_timeout

Charon by default uses the normal retransmission mechanism and timeouts to check the liveness of a peer, as all messages are used for liveness checking. For compatibility reasons, with IKEv1 a custom interval may be specified; this option has no effect on connections using IKEv2.

StrongSwan default: "0s"