--- title: Client Portal Security Settings description: "Security Settings Guide This guide provides instructions for configuring security-related settings (Multi-Factor Authentication, Allowed IP Access) in the [client portal](https://bestnetllc.co.jp/en/encyclopedia/client-portal-en/). ## Overview In the [client portal](https://bestnetllc.co.jp/en/encyclopedia/client-portal-en/), you can enhance account security by configuring **Multi-Factor Authentication (MFA)** and **Allowed IP Access**.…" url: "https://bestnetllc.co.jp/en/docs/client-portal-security-settings/" updated: "2026-10-19" category: client portal --- # Client Portal Security Settings Security Settings Guide This guide provides instructions for configuring security-related settings (Multi-Factor Authentication, Allowed IP Access) in the [client portal](https://bestnetllc.co.jp/en/encyclopedia/client-portal-en/). ## Overview In the [client portal](https://bestnetllc.co.jp/en/encyclopedia/client-portal-en/), you can enhance account security by configuring **Multi-Factor Authentication (MFA)** and **Allowed IP Access**. ## Prerequisites - An account with [client portal](https://bestnetllc.co.jp/en/encyclopedia/client-portal-en/) login access - To configure Multi-Factor Authentication, you will need one of the following: - A smartphone with an authentication app (such as Google Authenticator / Authy) - Access to your registered email address (if using Email MFA) ## 1. Open the Security Settings Screen ### 1Open “Security” from the left menu 1. Log in to the [client portal](https://bestnetllc.co.jp/en/encyclopedia/client-portal-en/). 2. Click **“Security”** in the left menu. ![Opening Security from the left menu](https://bestnetllc.co.jp/wp-content/uploads/2026/01/01-open-security-menu-1.png) ## 2. Configure Multi-Factor Authentication ### 2Open the “Multi-Factor Authentication” tab From the tabs at the top of the Security screen, select **“Multi-Factor Authentication”**. ![List of tabs in the Security screen](https://bestnetllc.co.jp/wp-content/uploads/2026/01/02-security-tabs-3.png) On the “Multi-Factor Authentication” screen, available methods (such as Google Authenticator / Email MFA) will be displayed. ![List of available Multi-Factor Authentication methods](https://bestnetllc.co.jp/wp-content/uploads/2026/01/03-mfa-method-selection-1.png) ### 2.1Enable Google Authenticator 1. Click **“Enable”** in the “Google Authenticator” section. 2. Scan the displayed QR code with your authentication app (or manually enter the secret key). 3. Click **“Continue”** on the screen. 4. If a confirmation code entry screen appears, enter the one-time code displayed in your authentication app and complete the process (follow the on-screen instructions). ![Google Authenticator setup screen](https://bestnetllc.co.jp/wp-content/uploads/2026/01/04-mfa-google-authenticator-setup-2.png) ### 2.2Enable Email MFA 1. Click **“Enable”** in the “Email MFA” section. 2. Click **“Send one-time code via Email”** (or “Resend”) to receive a confirmation code via email. 3. Enter the confirmation code you received in **“One-time code”** and click **“Submit”**. ![Email MFA confirmation code sending screen](https://bestnetllc.co.jp/wp-content/uploads/2026/01/05-mfa-email-send-code-1.png) ## 3. Configure Allowed IP Access (IP Restriction) ### 3.1Add Allowed IP/Range “Allowed IP Access” is a feature that restricts login to specific source IP addresses (or ranges). It is effective when access sources can be limited, such as corporate fixed-line connections. 1. Open the **“Allowed IP Access”** tab in the Security screen. 2. Enter the IP address (or range) you wish to allow in the input field. 3. Click **“Add Allowed IP/Range”**. 4. Verify that the rule has been added to the list. ![Screen for adding rules in Allowed IP Access](https://bestnetllc.co.jp/wp-content/uploads/2026/01/06-ip-access-add-rule-3.png) ### 3.2Important: Always Allow Your Current IP Warning As a result of setting allowed IPs, **if your current IP address is not included in the allow list, you may be unable to log in in the future**. Check the “Current IP Address” displayed on the screen and ensure that the IPs used in your operations (such as fixed-line connection IPs or VPN exit IPs) are included in the allow list. ### 3.3Rule Format (Input Examples) Enter according to the format examples displayed on the screen (representative examples). - **all**: Matches all IPs (no restriction) - **xxx.xxx.xxx.xxx**: Single IP address - **xxx.xxx.xxx.xxx/m**: CIDR format (example: 203.0.113.10/32) - **xxx.xxx.xxx.xxx/mmm.mmm.mmm.mmm**: IP address and mask in dotted-quad format ## 4. Verify Configuration Changes in History ### 4.1Check Logs (Activity History) After making changes, you can check logs and sent emails from the **“History”** section in the portal. 1. Click **“History”** in the left menu. 2. Open **“Logs”** from the tabs at the top. 3. Verify that security-related operations such as IP restriction additions and deletions are recorded. ![Verifying security-related operations in the History logs screen](https://bestnetllc.co.jp/wp-content/uploads/2026/01/08-history-activity-log.png) ### 4.2Check Email (Sent Email History) 1. Open **“Email”** from the tabs at the top of the “History” screen. 2. Verify that emails such as Email MFA confirmation codes (subject: **“Confirmation Code”**) have been sent. ![Verifying sent email history in the History email screen](https://bestnetllc.co.jp/wp-content/uploads/2026/01/09-history-email-log-2.png) ## 5. Troubleshooting ### 5.1 Unable to log in after setting IP restriction - Verify that your **current global IP (fixed-line connection / VPN exit IP)** is included in the allow list. - If you are currently logged in, you can delete the relevant rule from the **trash icon**. - If you cannot log in, contact your administrator or support team to request the removal of IP restrictions. ### 5.2 Not receiving Email MFA confirmation code - Check your spam/junk email folder. - Use **“Send one-time code via Email”** (Resend). - Verify that your registered email address is current (check Account Information).