VPN

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[[UTAPwiki/計算機]]

*VPN setting [#e387aeb6]
Information by the School of Science: http://jimubu.adm.s.u-tokyo.ac.jp/public/index.php/VPN_connection_service

**Linux [#e8575c90]
***Background [#o725a39e]
The information by the School of Science is outdated/wrong.
"Seems there is no easy way anymore to establish a L2tp VPN connection since OpenSwan has been deprecated and removed in Ubuntu 14.10". However: "A PPA exists now for network-manager-l2tp"
(https://askubuntu.com/questions/617785/how-to-connect-to-l2tp-over-ipsec-vpn)

***Setup [#c1bfdfc8]
(Tested with Ubuntu 20.04.2 LTS on ThinkPad, September 2022)
1. Install the network manager:
- sudo apt-get install network-manager-l2tp
- sudo apt-get install network-manager-l2tp-gnome

2. From the "Network" settings, add a new VPN:
- Select "Layer 2 Tunneling Protocol (L2TP)", see picture.

3. Fill out the "Identity" (see picture):
&attachref(VPNsetup.png);
&attachref(UbuntuVPN.png);
- Gateway: vpn.adm.s.u-tokyo.ac.jp
- Type: Password
- User name: your (10-digit) UTokyo user ID
- Password: your School of Science Password
- If you are asked for a pre-shared key (PSK) or shared secret: 8bARDjEggGTB

4. Fill out the "IPsec settings"
&attachref(irO5zzX4.png);
- <Tick Enable IPsec tunnel to L2TP host> 
- Pre-shared key: 8bARDjEggGTB
- Phase1 Algorithms: aes256-sha1-modp1536
- Phase2 Algorithms: 3des-sha1-modp1536

**OSX [#e6b5a384]
TBD

**Windows [#q35ce755]
TBD