part of pptp mpd5 config suitable for ipad vpn client working thru GSM providers
pptp:
create bundle template B
set iface enable proxy-arp
set iface idle 1800
set iface enable tcpmssfix
set ipcp yes vjcomp
set ippool add poolsat 192.168.0.2 192.168.0.100
set ipcp ranges 192.168.0.1/32 ippool pool1
set ipcp dns DNSIP_IFEXIST
set bundle enable compression
set ccp yes mppc
set mppc yes e40
set mppc yes e128
set mppc yes stateless
create link template L pptp
set link action bundle B
set link enable multilink
set link yes acfcomp protocomp
set link no pap chap
set link enable chap
set link enable chap-msv1
set link enable chap-msv2
set link keep-alive 10 60
set link mtu 1460
set pptp self REALVPN_IP
set link enable incoming