I tried to connect to an MT v2.8.11 with PPTP but get the following with mschap1 configured on the MT:
Sep 16 14:26:43 Brians-G4-at-Work pppd[1575]: pppd 2.4.2b1 started by root, uid 0
Sep 16 14:26:43 Brians-G4-at-Work pppd[1575]: PPTP connecting to server '24.153.172.158' (24.153.172.158)...
Sep 16 14:26:43 Brians-G4-at-Work pppd[1575]: PPTP connection established.
Sep 16 14:26:43 Brians-G4-at-Work kernel: pptp_wan_attach, link index = 0, (ld = 0x2692304)
Sep 16 14:26:43 Brians-G4-at-Work pppd[1575]: Using interface ppp0
Sep 16 14:26:43 Brians-G4-at-Work pppd[1575]: Connect: ppp0 <--> socket[34:17]
Sep 16 14:26:44 Brians-G4-at-Work pppd[1575]: Remote message: Welcome.
Sep 16 14:26:44 Brians-G4-at-Work pppd[1575]: Disabling 40-bit MPPE; MS-CHAP LM not supported
Sep 16 14:26:44 Brians-G4-at-Work pppd[1575]: MPPE required but peer refused
Sep 16 14:26:44 Brians-G4-at-Work pppd[1575]: Connection terminated.
Sep 16 14:26:44 Brians-G4-at-Work pppd[1575]: PPTP disconnecting...
Sep 16 14:26:44 Brians-G4-at-Work pppd[1575]: PPTP disconnected
Sep 16 14:26:44 Brians-G4-at-Work pppd[1575]: Exit.
with mschap2 configured I get the following:
Sep 16 14:26:59 Brians-G4-at-Work pppd[1576]: pppd 2.4.2b1 started by root, uid 0
Sep 16 14:26:59 Brians-G4-at-Work pppd[1576]: PPTP connecting to server '24.153.172.158' (24.153.172.158)...
Sep 16 14:26:59 Brians-G4-at-Work pppd[1576]: PPTP connection established.
Sep 16 14:26:59 Brians-G4-at-Work kernel: pptp_wan_attach, link index = 0, (ld = 0x2671704)
Sep 16 14:26:59 Brians-G4-at-Work pppd[1576]: Using interface ppp0
Sep 16 14:26:59 Brians-G4-at-Work pppd[1576]: Connect: ppp0 <--> socket[34:17]
Sep 16 14:26:59 Brians-G4-at-Work pppd[1576]: MPPE required but peer refused
Sep 16 14:26:59 Brians-G4-at-Work pppd[1576]: Connection terminated.
Sep 16 14:26:59 Brians-G4-at-Work pppd[1576]: PPTP disconnecting...
Sep 16 14:26:59 Brians-G4-at-Work pppd[1576]: PPTP disconnected
Sep 16 14:26:59 Brians-G4-at-Work pppd[1576]: Exit.