I have a sony vaio laptop, with ubuntu 11.04 and windows 7 on it. I have configured a VPN connection on ubuntu, in order to connect to my computer at work but it keeps not working, and I get the error VPN connection failed.
In windows 7, from the same laptop it works fine. Also, I tried to connect through linux-VPN from another wireless network, at a friends house, and it worked.
At my house, I have a linksys router and I have tried it with and without ethernet cable. What can be the problem? Maybe a setting at the router? I've searched them and they look fine.. any suggestions?
About the software, on ubuntu I use the network manager pptp, and on windows, I use the default, I didn't make any change, just created a VPN, inserted my username password, host IP and worked.
Here are the settings for the windows VPN that works:
Type of VPN: automatically
Protocols permited: It mentions that it will use EAP-MSCHAPv2 as IKEv2 type VPN and has some options to chose for other types VPN. The choosen are the following: CHAP, Microsoft CHAP version2 (MS-CHAP v2)
Tab network: enabled: TCP/IPv6, TCP/IPv4, File sharing for files and printers for Microsoft networks, Client program for Microsoft networks
Also, in order to setun the VPN on ubuntu, I followed these steps bellow except for the STEP 4, because I didn't know the internal IP and some other settings http://geekyprojects.com/ubuntu/ubuntu-vpn-connection/