Overview

You can log in to a bastion host remotely, using a browser, or using a client.

During remote logins, you can select local, IAM, or admin login mode. In local or IAM login mode, use the accounts as required. In admin login mode, you can log in to a bastion host as user admin without entering passwords.

Accounts or keys are required for local logins, client logins, and browser logins.

If you have logged in to your bastion host using the current browser, you need to log out of the current account before logging in to the instance using another account.

Port Requirements

To use a bastion host for resource management, ensure that the communication between the the bastion host and the managed resources is enabled. Before you start, check whether your network ACL configuration allows access to the bastion host and configure the security group of the bastion host by referring to Table 1.

During cross-version upgrade, ports 80, 8080, 443, and 2222 are automatically enabled for the instance. If you do not need to use these ports, disable them immediately after the upgrade.
During cross-version upgrade, ports 22, 31036, 31679, and 31873 are automatically enabled for the instance. After the upgrade, keep port 31679 enabled and disable other ports immediately if you do not need to use them.

**Table 1** Inbound and outbound rule configuration reference
Scenario Description	Direction	Protocol/Application	Port
Accessing a bastion host through a web browser (HTTP and HTTPS)	Inbound	TCP	80, 443, and 8080
Accessing a bastion host through Microsoft Terminal Services Client (MSTSC)	Inbound	TCP	53389
Accessing a bastion host through an SSH client	Inbound	TCP	2222
Accessing a bastion host through FTP clients	Inbound	TCP	20~21
Remotely accessing Linux ECSs of a bastion host over SSH clients	Outbound	TCP	22
Remotely accessing Windows ECSs of a bastion host over the RDP Protocol	Outbound	TCP	3389
Accessing Oracle databases through a bastion host	Inbound	TCP	1521
Accessing Oracle databases through a bastion host	Outbound	TCP	1521
Accessing MySQL databases through a bastion host	Inbound	TCP	33306
Accessing MySQL databases through a bastion host	Outbound	TCP	3306
Accessing SQL Server databases through a bastion host	Inbound	TCP	1433
Accessing SQL Server databases through a bastion host	Outbound	TCP	1433
Accessing DB databases through a bastion host	Inbound	TCP	50000
Accessing DB databases through a bastion host	Outbound	TCP	50000
Accessing GaussDB databases through a bastion host	Inbound	TCP	18000
Accessing GaussDB databases through a bastion host	Outbound	TCP	18000
License servers	Outbound	TCP	9443
Cloud services	Outbound	TCP	443
Accessing a bastion host system through the SSH client in the same security group	Outbound	TCP	2222
SMS service	Outbound	TCP	10743 and 443
Domain name resolution service	Outbound	UDP	53
Accessing PGSQL databases through a bastion host	Inbound	TCP	15432
Accessing PGSQL databases through a bastion host	Outbound	TCP	5432

Logon Type

Different login methods require different credentials. If multifactor verification is enabled, the static password login method becomes invalid.

**Table 2** Login method description
Logon Type	Login Description
Password	Enter the username and password of your bastion host.
Mobile SMS Authentication	Enter the username and password of your bastion host, click Send Code, and enter the SMS verification code you will receive.
Mobile OTP	Enter the username and password first, and then enter the mobile one-time password (OTP).
USBKey	Insert your USB key into your terminal device, select the issued USB key, and enter the corresponding personal identification number (PIN).
One-time Passwords (OTPs)	Enter the username and password first, and then enter the verification code displayed on your OTP token device.

Verification Type

You can use remote Active Directory (AD), Remote Authentication Dial In User Service (RADIUS), Lightweight Directory Access Protocol (LDAP), Security Assertion Markup Language (SAML), and Azure AD authentication methods. You can use existing user passwords on any of those remote servers for identity verification.

**Table 3** Authentication methods
Verification Type	Authentication Description
Local Authentication	Static passwords configured for the system are used for identity verification. Multifactor verification can be configured for users authenticated by static password. You can reset or change the static passwords. If you forgot this password, you can find it back through email.
AD domain authentication	The passwords of users on the AD server are used for identity verification. Multifactor verification can be configured for users authenticated by static password. Passwords cannot be changed through the bastion host.
RADIUS Authentication	The passwords of users on the RADIUS server are used for identity verification. Multifactor verification can be configured for users authenticated by static password. Passwords cannot be changed through the bastion host.
LDAP Authentication	The passwords of users on the LDAP server are used for identity verification. Multifactor verification can be configured for users authenticated by static password. Passwords cannot be changed through the bastion host.
Azure AD authentication	The passwords of Microsoft accounts are used for identity verification. The login page is redirected to the Microsoft Azure login page for you to provide credentials. Multifactor verification cannot be configured for users authenticated by the Azure AD server. Passwords cannot be changed through the bastion host.
SAML authentication	The passwords of users on the SAML server are used for identity verification. Multifactor verification can be configured for users authenticated by static password. Passwords cannot be changed through the bastion host.