This is the full content of the log from the server:
Jun 18 02:19:34 Gateway xl2tpd[21311]: Connection established to 94.191.133.95, 1701. Local: 41889, Remote: 53419 (ref=0/0). LNS session is 'default'
Jun 18 02:19:34 Gateway xl2tpd[21311]: Call established with 94.191.133.95, PID: 21907, Local: 11861, Remote: 48056, Serial: 3
Jun 18 02:19:34 Gateway pppd[21907]: pppd 2.4.4 started by root, uid 0
Jun 18 02:19:34 Gateway zebra[679]: interface ppp0 index 5036 <POINTOPOINT,NOARP,MULTICAST> added.
Jun 18 02:19:34 Gateway pppd[21907]: Connect: ppp0 <-->
Jun 18 02:19:40 Gateway pppd[21907]: Connection terminated: no multilink.
Jun 18 02:19:40 Gateway zebra[679]: interface ppp0 index 5036 deleted.
Jun 18 02:19:40 Gateway pppd[21907]: Modem hangup