SoS VPN Service

Information Technology Team > SoS VPN Service

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1 Overview

1.1 Purpose

The School of Science VPN service allows secure connections from external networks to departmental or laboratory networks. Directly exposing internal servers or printers to external networks is not recommended for security reasons, so external access to internal networks is generally blocked. By using this service, users can access file servers and printers from external networks as if they were directly connected to the departmental or laboratory network.

Access to university-wide contracted electronic journals via departmental VPN is not permitted. Please use the following university-wide service instead:

• EZproxy

1.2 Types of Service

The School of Science VPN service provides:

• **VPN connection using client software**
• **L2TP VPN connection using OS built-in features**

Client software-based VPN allows administrators to manage connected devices similarly to wired LAN, while L2TP VPN is supported by most operating systems and can be configured easily by users. See the table below for details:

	VPN using client software	L2TP VPN connection
Preparation by network administrators before use	Not required	Requires IP address allocation for L2TP VPN service
Device management method	Managed by VPN MAC address (same as wired LAN)	No per-device management (follow departmental/lab rules)
Supported environments	Windows	Windows, macOS, iOS (iPad, iPhone)

2 Eligible Users

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

3 Supported Environments

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

4 Usage Procedure

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

• SoS My Network Status

4.1 Notes

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

• SoS Service Application Page (temporary)

5 L2TP VPN Setup

For detailed setup instructions per device, refer to:

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

5.1 Settings

Server	TBA
Pre-shared key Account Password	See SoS My Network status page above
Authentication	PAP

6 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	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