Current implementation vpnt pptp remote-access use interfaces names pppX but should use pptpX
vyos@GW1:~$ show vpn remote-access ifname | username | calling-sid | ip | type | comp | state | uptime --------+----------+---------------+------------+------+------+--------+---------- ppp0 | test | 192.168.0.102 | 100.64.0.1 | pptp | mppe | active | 00:00:37