PPTP client problem

[ozgurcnbyz]

Sorry if this has been discussed before but i am not good at searching forums.
I have a VPS at linode which i setup pptp server along with openvpn. i can connect to the pptp server from any device successfully except my ac66u which produces the following logs

Jan 5 12:09:47 pptp[1588]: Plugin pptp.so loaded.
Jan 5 12:09:47 pptp[1588]: PPTP plugin version 0.8.5 compiled for pppd-2.4.5, linux-2.6.22.19
Jan 5 12:09:47 pptp[1589]: pppd 2.4.5 started by admin, uid 0
Jan 5 12:09:48 pptp[1589]: Using interface ppp5
Jan 5 12:09:48 pptp[1589]: Connect: ppp5 <--> pptp ()
Jan 5 12:09:48 pptp[1589]: CHAP authentication succeeded
Jan 5 12:09:48 pptp[1589]: LCP terminated by peer (MPPE required but peer negotiation failed)
Jan 5 12:09:51 pptp[1589]: Connection terminated.
Jan 5 12:09:51 pptp[1589]: Modem hangup

 

[ozgurcnbyz]

ok got it working. found the solution in another thread. As merlin stated asus router somehow disables MPPE. below is the commands to run on the ssh

nvram set vpnc_pptp_options_x="+mppe-128"
nvram commit