PPTP Timeout Causes Connections to Drop?

Hello, 

Experiencing VPN disconnects. Not sure why.

Reviewing the PPTP logs it appears that the connection timeout is being reached?

2013:03:15-18:34:00 Hillary pppd-pptp[13889]: id="2201" severity="info" sys="SecureNet" sub="vpn" event="Connection started" username="johndoe" variant="pptp" srcip="xyz" virtual_ip="192.168.0.2"
2013:03:15-18:52:07 Hillary pppd-pptp[13884]: No response to 4 echo-requests
2013:03:15-18:52:07 Hillary pppd-pptp[13884]: Serial link appears to be disconnected.
2013:03:15-18:52:07 Hillary pppd-pptp[13884]: Connect time 18.2 minutes.
2013:03:15-18:52:07 Hillary pppd-pptp[13884]: Sent 12040515 bytes, received 545120 bytes.
2013:03:15-18:52:07 Hillary pppd-pptp[13884]: MPPE disabled
2013:03:15-18:52:09 Hillary pppd-pptp[14547]: id="2202" severity="info" sys="SecureNet" sub="vpn" event="Connection terminated" username="johndoe" variant="pptp" srcip="xyz" virtual_ip="192.168.0.2"
2013:03:15-18:52:10 Hillary pppd-pptp[13884]: Connection terminated.
2013:03:15-18:52:10 Hillary pppd-pptp[13884]: Modem hangup
2013:03:15-18:52:10 Hillary pppd-pptp[13884]: Exit.

Is my assessment of the timeout being reached correct? Is it possible to increase this value? If so, where? My Astaro hardware is on the older side...

Thanks!

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