Security Information

Security Information archive

• 2026/05/11

  Monthly Report Update of Email Virus Check (January 2026 to March 2026)

• 2026/02/03

  Monthly Report Update of Email Virus Check (October 2025 to December 2025)

• 2025/11/04

  Monthly Report Update of Email Virus Check (July 2025 to September 2025)

• 2025/08/01

  Monthly Report Update of Email Virus Check (April 2025 to June 2025)

• 2025/04/30

  Monthly Report Update of Email Virus Check (January 2025 to March 2025)

Hidden Internet Risks and How to Manage Them

Internet is very useful but also risky at the same time.
It is important to have the correct knowledge and take the necessary safety measures on your own.
This page explains about the hidden internet risks and how to manage them.

Hidden internet risks and how to manage them

1. 1

   What is computer virus?
   What are the very basic measures?

2. 2

   Spam email is sent to you without your choice.
   The number of unwanted, malicious spam emails is increasing.

3. 3

   New internet scams arise one after another.
   What are the details and how do you defend yourself?

4. 4

   What are the tricks of online identity theft and how do you manage them?

5. 5

   Your PC could also be targeted.
   What happens when you are intruded and how do you prevent it?

6. 6

   Beware of copyright infringement with P2P file sharing apps and software

Asahi Net’s Information Security Practices

Asahi Net, Inc., which operates the ISP business “Asahi Net” also puts a lot of effort in security.
In order to provide a safe and secure services, Asahi Net continuously put a a lot of effort in protection of personal information and security enhancement.

Personal Information Protection/Efforts for Security Enhancement

Asahi Net, Inc. has obtained ISO/IEC 27001:2022, the international standards of information security management system (ISMS) and is actively working on information security.

For our customers to feel safe and comfortable using Asahi Net services

Asahi Net’s Security Measures

Outbound Port 25 Blocking (OP25B)

Asahi Net blocks Port 25 to prevent spam email going through in order to provide a safe internet environment for our members.

Inbound Port 53 Blocking (IP53B)

In order to prevent servers or routing devices to be targeted for any unauthorized use, Asahi Net takes a proactive measure called Inbound Port 53 Blocking (IP53B).

Security Blog

It gives you the latest security information and tips to use the internet safely.

Kaspersky.com Blog (only in Japanese)

Useful Security Links

You can find useful information in the following links.