Hi,
I keep failing to connect to my vpn from an Ubuntu 10.10 station using pptp. I have tried this over a wired network connection and over a 3g usb modem. The connections work fine because i hooked up a Windows station to them and with the exact same vpn settings it manages to connect without a problem. The firewall on the ubuntu station is completely turned off.
I started tcpdump on the adapter after debug logging showed “LCP: timeout sending Config-Requests”. After tcpdump i found out my GRE packets weren’t receivin any answers:
12:34:57.543600 IP ubuntu-desktop > 86-xxx-xxx-xx: GREv1, call 120, seq 3, length 36: LCP, Conf-Request (0x01), id 1, length 22
12:35:00.547603 IP ubuntu-desktop > 86-xxx-xxx-xx: GREv1, call 120, seq 4, length 36: LCP, Conf-Request (0x01), id 1, length 22
12:35:03.551601 IP ubuntu-desktop > 86-xxx-xxx-xx: GREv1, call 120, seq 5, length 36: LCP, Conf-Request (0x01), id 1, length 22
12:35:06.551595 IP ubuntu-desktop > 86-xxx-xxx-xx: GREv1, call 120, seq 6, length 36: LCP, Conf-Request (0x01), id 1, length 22
12:35:09.555601 IP ubuntu-desktop > 86-xxx-xxx-xx: GREv1, call 120, seq 7, length 36: LCP, Conf-Request (0x01), id 1, length 22
after the 10th seq the connection closes.
Has anybody else encountered this problem?
Is this problem tied to the ubuntu os, because the windows station on the same connections (3g and wired) works perfectly?