Доброй ночи!

# rpm -qf `which pptpd`
pptpd-1.3.3-1.fc6
# rpm -qf `which pppd`
ppp-2.4.4-2
#

Dec 24 02:26:20 ppp-server pptpd[2839]: CTRL: Client 192.168.13.155 control connection started
Dec 24 02:26:21 ppp-server pptpd[2839]: CTRL: Starting call (launching pppd, opening GRE)
Dec 24 02:26:21 ppp-server pppd[2840]: pppd 2.4.4 started by root, uid 0
Dec 24 02:26:21 ppp-server pppd[2840]: Using interface ppp0
Dec 24 02:26:21 ppp-server pppd[2840]: Connect: ppp0 <--> /dev/pts/1
Dec 24 02:26:51 ppp-server pppd[2840]: LCP: timeout sending Config-Requests
Dec 24 02:26:51 ppp-server pppd[2840]: Connection terminated.
Dec 24 02:26:51 ppp-server pppd[2840]: Modem hangup
Dec 24 02:26:51 ppp-server pppd[2840]: Exit.
Dec 24 02:26:51 ppp-server pptpd[2839]: GRE: read(fd=6,buffer=8059660,len=8196) from PTY failed: status = -1 error = Input/output error, usually caused by unexpected termination of pppd, check option syntax and pppd logs
Dec 24 02:26:51 ppp-server pptpd[2839]: CTRL: PTY read or GRE write failed (pty,gre)=(6,7)
Dec 24 02:26:51 ppp-server pptpd[2839]: CTRL: Client 192.168.13.155 control connection finished

При этом, конфиги взяты с другого сервера, где все "на ура":
# cat /etc/pptpd.conf
option /etc/ppp/options.pptpd
debug
localip 10.10.254.1
remoteip 10.10.254.2-253

# cat /etc/ppp/options.pptpd
name pptpd
refuse-pap
require-chap
ms-dns 192.168.13.17
proxyarp
debug
nobsdcomp
novj
novjccomp

# cat /etc/redhat-release
Fedora release 8 (Werewolf)

# rpm -qf /boot/vmlinuz-2.6.23.1-42.fc8
kernel-2.6.23.1-42.fc8