SoS VPN Service

Information Technology Team > SoS VPN Service

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1 Overview

1.1 Purpose of use

The SoS VPN service provides secure access to your Department/laboratory subnet from external networks. Since it is not desirable for security reasons to directly disclose individual servers and printers to the outside, access to the internal network from the outside is basically denied at the School of Science. By using this service, users can access a file server or printer from a terminal connected to an external network in the same way as if they were directly connected to a network within a department or laboratory.

Access to journals contracted by university using this VPN service is not permitted. Please use the following university-wide services.

• EZproxy

1.2 Service type

The School of Science offers a VPN using client software and an L2TP VPN using functions built into the OS. In VPN using client software, department or laboratory managers need no special management of VPN service. L2TP VPN is supported by many OS, so users can use it with relatively simple settings. See the table below for detailed differences.

	VPN using client software	L2TP VPN
Preparation of department or laboratory manager	no	assing dedicated IP addresses for L2TP VPN
host management	by MAC address for VPN interface (same as wired network)	no (no unique MAC address)
Environment	Windows	Windows, Mac, iOS(iPad, iPhone)

2 Eligible Users

• Faculty, staff, and students with a UTokyo Account who are authorized by their department or laboratory network administrator.

3 Supported Environments

• VPN using client software:
  • Windows
• L2TP VPN:
  • Windows, macOS, iOS (iPad, iPhone)

4 Usage Procedure

To connect to the SoS VPN service, you need a SoS VPN account and SoS VPN password. Check your network information on the following page:

• SoS My Network Status (coming soon)

4.1 Notes

Access to the above page requires UTokyo Account authentication. If you cannot access it, confirm your UTokyo Account service registration here:

• Using School of Science Services with UTokyo Account

5 Setup for L2TP

Please refer to the following page for the setting for each device:

• https://ja.softether.org/4-docs/2-howto/L2TP_IPsec_Setup_Guide

5.1 Settings

Server	xxx.adm.s.u-tokyo.ac.jp (TBA)
Pre-shared key Account Password	See SoS My Network status page above
Authentication	PAP

6 Setup for VPN Using Client Software

6.1 Download Client Software

This VPN service uses SoftEther VPN. Download and install the client software from:

• http://www.softether-download.com/

Select SoftEther VPN Client in the component menu and choose your OS. Linux and macOS options are available, but these require command-line usage and manual network configuration. macOS instructions are not included in the official manual.

Manual and setup guide:

• https://ja.softether.org/4-docs/1-manual

6.2 Settings

Hostname	xxx.adm.s.u-tokyo.ac.jp (TBA)
Port	443 (default)
Virtual HUB name	sos (select from list)
Authentication type	Password authentication (select from list)
Username Password	See SoS My Network status page above