Help Center/ MapReduce Service/ User Guide/ MRS Cluster O&M/ MRS Cluster Security Configuration/ MRS Cluster Security Hardening/ Enabling the Graphic Verification Code and IP Address Verification for Manager Login
Updated on 2026-09-24 GMT+08:00
View PDF
Share

Enabling the Graphic Verification Code and IP Address Verification for Manager Login

Configuring Graphic Code Verification for Login

CAPTCHA verification during login can be enabled for clusters of MRS 3.6.0 or later to strengthen the system's resistance to brute-force cracking attacks. After enabling this feature, each login will require verification of graphic verification code.

By default, this feature is disabled; you can manually enable it by referring to this section.

  1. Log in to the active management node as user omm.
  2. Run the following command to modify the configuration:

    vi ${BIGDATA_HOME}/om-server/tomcat/webapps/cas/WEB-INF/classes/config/application.properties

    Set cas.authn.rest.captcha-enabled to true.

  3. Run the following command to restart Tomcat:

    sh ${BIGDATA_HOME}/om-server/tomcat/bin/shutdown.sh;sh ${BIGDATA_HOME}/om-server/tomcat/bin/startup.sh

  4. Log in to the standby management node as user omm, and perform Step 2.

Enabling IP Address Verification for Login

IP address verification during login can be enabled for clusters of MRS 3.6.0 or later to strengthen the system's resistance to brute-force cracking attacks. After enabling this feature, the IP address will be locked for 5 minutes if login fails for five consecutive times. After 5 minutes, the account can be unlocked after a successful login; otherwise, it will remain locked.

By default, this feature is disabled; you can manually enable it by referring to this section.

  1. Log in to the active management node as user omm.
  2. Run the following command to modify the configuration:

    vi ${BIGDATA_HOME}/om-server/tomcat/webapps/cas/WEB-INF/classes/config/application.properties

    Set cas.authn.rest.ip-check-enabled to true.

  3. Run the following command to restart Tomcat:

    sh ${BIGDATA_HOME}/om-server/tomcat/bin/shutdown.sh;sh ${BIGDATA_HOME}/om-server/tomcat/bin/startup.sh

  4. Log in to the standby management node as user omm, and perform Step 2.
Parent Topic: MRS Cluster Security Hardening