-PPTP_PROTO="$(nvram get pptp_proto)"
-[ "$PPTP_PROTO" = "static" ] || PPTP_PROTO=""
-PPTP_PROTO="${PPTP_PROTO:-dhcp}"
-IP=$(nvram get pptp_server_ip)
-USERNAME=$(nvram get ppp_username)
-PASSWORD=$(nvram get ppp_passwd)
-KEEPALIVE=$(nvram get ppp_redialperiod)
-KEEPALIVE=${KEEPALIVE:+lcp-echo-interval 10 lcp-echo-failure $KEEPALIVE}
-DEMAND=$(nvram get ppp_demand)
-case "$DEMAND" in