[Glossary] What is an IP address?

What is an IP address?

An IP address is information that works like an "address" for identifying devices on the internet or a corporate network.
Every device that communicates over a network — including PCs and routers connected to a corporate network — has one.
For this reason, IP addresses are widely used as a general security measure.

Examples of common security measures using IP addresses

Source IP Restrictions (IP access control)

Access is permitted only from IP addresses belonging to the corporate network or specific sites, and all other access is blocked. This is a method commonly used in SaaS services and VPNs.

Access log monitoring and analysis

IP addresses recorded in the access logs of systems and web services are regularly monitored to detect unauthorized access from overseas and similar threats.
Teachme Biz also uses IP addresses for access log monitoring.

Firewall allow/deny settings

Rules are configured on server and network device firewalls at the individual IP address level to block suspicious access.

Basic structure of IP addresses

Currently, two types of IP addresses are in use, differentiated by structure: IPv4 addresses and IPv6 addresses.

　Examples:
　IPv4 address (32-bit): 10.0.0.1, 192.168.1.1
　IPv6 address (128-bit): fe80::1, 2001:db8::1

Teachme Biz's IP Restrictions feature supports IPv4 addresses only.

Global IP and Private IP (Local IP)

There are two types of IP addresses: global IP and private IP.
The main difference between the two lies in the scope of access.

Global IP

A public IP address that is uniquely identified on the internet, functioning like an address that can be used across the entire internet. It can be accessed from anywhere in the world.

Private IP (Local IP)

An address-like piece of information that can only be used within a limited network, such as a home or corporate local network. It is an internal IP address and cannot be accessed directly from the internet.

Supplemental information: Static IP vs. Dynamic IP

There are two types of IP addresses: static IP addresses, which are always assigned the same global IP, and dynamic IP addresses, which change each time you connect. Static IPs make it easy to identify the connection source for IP Restrictions and allow stable access, so they are used for the purpose of restricting access to specific sites or users.
If you are using mobile data (SIM network) or a home network, the global IP address is often dynamic, changing each time you connect.
As a result, you may not be able to access Teachme Biz if IP Restrictions are configured.

How to check your IP address

You can check your current connection's global IP address on the following site.

　Teachme Biz Usage Environment Diagnosis Page
　https://teachme.jp/diagnosis

The number listed under Request information > 4. Current IP address in the image is your current IP address.

Frequently Asked Questions

Q. We access Teachme Biz from multiple offices within our company. What happens with the IP address?
A. A different global IP address may be assigned to each office. Please check the IP address for each office as needed.

Q. How do I configure IP Restrictions in Teachme Biz?
A. Configure Group IP Restrictions or Folder IP Restrictions from the Administrator menu, and Register IP address the global IP addresses you want to allow.

For more details, please refer to the applicable manual.

Related:
Set up IP restriction for your group (Web Browser)
https://teachme.jp/8/manuals/9117232
Set up IP restriction for Group-shared folder (Web Browser)
https://teachme.jp/8/manuals/9117240

Summary

Understanding and managing IP addresses is important for security measures, troubleshooting, and operational control.
If you have any questions about the details or configuration of Teachme Biz's IP Restrictions feature, please Contact the Teachme Biz support team at support@teachme.jp.

Contact form
https://studist.my.site.com/tmbsupport/s