Problème VPN pptp-linux

Bonjour,

Je souhaite faire un tunnel VPN entre mon Debian (2.6.26-2-486) et un VPN.
J’ai donc installé pptp-linux et configuré

J’arrive à me connecter, tout fonctionne mais si je me déconnecté, impossible de me reconnecter!
Je ne vois pas du tout d’ou peux venir le problème. Depuis un client XP les logins fonctionnent.

Voici les logs renvoyés en mode debug:

hotline:~# pon blabla debug dump logfd 2 nodetach pppd options in effect: debug # (from command line) nodetach # (from command line) logfd 2 # (from command line) dump # (from command line) noauth # (from /etc/ppp/options.pptp) name # (from /etc/ppp/peers/xblabla) remotename PPTP # (from /etc/ppp/peers/blabla) # (from /etc/ppp/options.pptp) pty pptp mon.serveur.distant --nolaunchpppd # (from /etc/ppp/peers/blabla) ipparam blabla # (from /etc/ppp/peers/blabla) nobsdcomp # (from /etc/ppp/options.pptp) nodeflate # (from /etc/ppp/options.pptp) using channel 2 Using interface ppp0 Connect: ppp0 <--> /dev/pts/1 sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xdaa7ff68> <pcomp> <accomp>] sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xdaa7ff68> <pcomp> <accomp>] sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xdaa7ff68> <pcomp> <accomp>] sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xdaa7ff68> <pcomp> <accomp>] sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xdaa7ff68> <pcomp> <accomp>] sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xdaa7ff68> <pcomp> <accomp>] sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xdaa7ff68> <pcomp> <accomp>] sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xdaa7ff68> <pcomp> <accomp>] sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xdaa7ff68> <pcomp> <accomp>] sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xdaa7ff68> <pcomp> <accomp>] LCP: timeout sending Config-Requests Connection terminated. Script pptp mon.serveur.distant --nolaunchpppd finished (pid 2417), status = 0x0 Modem hangup

Et voici les fichiers de config:
options.pptp:

lock noauth nobsdcomp nodeflate

chap-secrets:

[code]# Secrets for authentication using CHAP

client server secret IP addresses

identifiant PPTP password *
[/code]

peers/blabla:

pty "adresse.du.serveur --nolaunchpppd" name identifiant remotename PPTP #require-mppe-128 file /etc/ppp/options.pptp ipparam blabla

Une petite idée?

Merci d’avance