SoS VPN Service
Information Technology Team > SoS VPN Service
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目次
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.
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. The SoS VPN Account is renewed every academic year. Check your network information on the following page:
- SoS My Network Status (coming soon: from 2026.1.15)
4.1 How to Read the SoS My Network Status Page
- Common ID
- Name (the name you registered when applying for School of science services)
- Name of the network you belong to (managed by the network administrator of your organization)
- Availability of VPN using a client software
- Availability of L2TP VPN
- Pre-shared key used for L2TP VPN
- SoS VPN Account
- SoS VPN Password
4.2 Notes
Access to the above page requires UTokyo Account authentication. If you cannot access it, confirm your UTokyo Account service registration here:
5 Setup for L2TP
L2TP is a standard VPN feature provided by many operating systems. Since the specific setup procedures differ depending on the device, please refer to the instructions for the device you are using. You may also refer to the setup guides on the following page.
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:
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:
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 |
