Veritas NetBackup™ Security and Encryption Guide

Last Published:
Product(s): NetBackup (8.1)
  1. Increasing NetBackup security
    1.  
      About NetBackup security and encryption
    2.  
      NetBackup security implementation levels
    3.  
      World-level security
    4.  
      Enterprise-level security
    5.  
      Datacenter-level security overview
    6.  
      NetBackup Access Control (NBAC)
    7.  
      Combined world, enterprise, and data center levels
    8.  
      NetBackup security implementation types
    9.  
      Operating system security
    10.  
      NetBackup security vulnerabilities
    11.  
      Standard NetBackup security
    12.  
      Media Server Encryption Option (MSEO) security
    13.  
      Client side encryption security
    14.  
      NBAC on master, media server, and graphical user interface security
    15.  
      NBAC complete security
    16.  
      All NetBackup security
  2. Security deployment models
    1.  
      Workgroups
    2.  
      Single datacenters
    3.  
      Multi-datacenters
    4.  
      Workgroup with NetBackup
    5.  
      Single datacenter with standard NetBackup
    6.  
      Single datacenter with Media Server Encryption Option (MSEO)
    7.  
      Single datacenter with client side encryption
    8.  
      Single datacenter with NBAC on master and media servers
    9.  
      Single datacenter with NBAC complete
    10.  
      Single datacenter with all security implemented
    11.  
      Multi-datacenter with standard NetBackup
    12.  
      Multi-datacenter with Media Server Encryption Option (MSEO)
    13.  
      Multi-datacenter with client side encryption
    14.  
      Multi-datacenter with NBAC on master and media servers
    15.  
      Multi-datacenter with NBAC complete
    16.  
      Multi-datacenter with all NetBackup security
  3. Port security
    1.  
      About NetBackup TCP/IP ports
    2. About NetBackup daemons, ports, and communication
      1.  
        Standard NetBackup ports
      2.  
        NetBackup master server outgoing ports
      3.  
        NetBackup media server outgoing ports
      4.  
        NetBackup enterprise media management (EMM) server outgoing ports
      5.  
        Client outgoing ports
      6.  
        Java server outgoing ports
      7.  
        Java console outgoing ports
      8.  
        About MSDP port usage
      9.  
        About Cloud port usage
      10. Additional port information for products that interoperate with NetBackup
        1.  
          About communication ports and firewall considerations in OpsCenter
        2.  
          Ports required to communicate with backup products
        3.  
          Web browser to launch OpsCenter user interface
        4.  
          About OpsCenter user interface and OpsCenter server software communication
        5.  
          About OpsCenter server to NetBackup master server (NBSL) communication
        6.  
          About SNMP traps
        7.  
          About communication between OpsCenter and Sybase database
        8.  
          About email communication in OpsCenter
    3. About configuring ports
      1.  
        Enabling or disabling random port assignments
      2.  
        Editing port information in configuration files
      3.  
        Updating client connection options
      4.  
        Updating port settings for the Media Manager in the vm.conf file
    4.  
      Port requirements for NDMP backups
    5.  
      Known firewall problems encountered when using NetBackup with third-party robotic products
  4. Auditing NetBackup operations
    1.  
      About NetBackup auditing
    2.  
      Viewing the current audit settings
    3.  
      Configuring auditing on a NetBackup master server
    4.  
      User identity in the audit report
    5.  
      About Enhanced Auditing
    6.  
      Enabling Enhanced Auditing
    7. Configuring Enhanced Auditing
      1.  
        Connecting to a media server with Enhanced Auditing
      2.  
        Changing a server across NetBackup domains
      3.  
        Configuration requirements if using Change Server with NBAC or Enhanced Auditing
    8.  
      Disabling Enhanced Auditing
    9.  
      Auditing host property changes
    10.  
      Retaining and backing up audit trail records
    11.  
      Viewing the audit report
    12.  
      Using the command line -reason or -r option
    13.  
      nbaudit log behavior
    14.  
      Audit alert notification for audit failures
  5. Access control security
    1.  
      About access control in NetBackup
    2.  
      User management
    3.  
      User authentication
    4.  
      Impact of Access Control via Enhanced Auditing on Java interface authorization
  6. NetBackup Access Control Security (NBAC)
    1.  
      About using NetBackup Access Control (NBAC)
    2.  
      NetBackup access management administration
    3.  
      About NetBackup Access Control (NBAC) configuration
    4. Configuring NetBackup Access Control (NBAC)
      1.  
        NBAC configuration overview
      2.  
        Configuring NetBackup Access Control (NBAC) on standalone master servers
      3.  
        Installing the NetBackup master server highly available on a cluster
      4.  
        Configuring NetBackup Access Control (NBAC) on a clustered master server
      5.  
        Configuring NetBackup Access Control (NBAC) on media servers
      6.  
        Installing and configuring access control on clients
      7.  
        About including authentication and authorization databases in the NetBackup hot catalog backups
      8.  
        NBAC configure commands summary
      9.  
        Unifying NetBackup Management infrastructures with the setuptrust command
      10.  
        Using the setuptrust command
    5. Configuring Access Control host properties for the master and media server
      1.  
        Authentication Domain tab
      2.  
        Authorization Service tab
      3.  
        Network Attributes tab
    6. Access Control host properties dialog for the client
      1.  
        Authentication Domain tab for the client
      2.  
        Network Attributes tab for the client
    7. Troubleshooting Access Management
      1.  
        Troubleshooting NBAC issues
      2.  
        Configuration and troubleshooting topics for NetBackup Authentication and Authorization
      3. Windows verification points
        1.  
          Master server verification points for Windows
        2.  
          Media server verification points for Windows
        3.  
          Client verification points for Windows
      4. UNIX verification points
        1.  
          UNIX master server verification
        2.  
          UNIX media server verification
        3.  
          UNIX client verification
      5. Verification points in a mixed environment with a UNIX master server
        1.  
          Master server verification points for a mixed UNIX master server
        2.  
          Media server verification points for a mixed UNIX master server
        3.  
          Client verification points for a mixed UNIX master server
      6. Verification points in a mixed environment with a Windows master server
        1.  
          Master server verification points for a mixed Windows master server
        2.  
          Media server verification points for a mixed Windows master server
        3.  
          Client verification points for a mixed Windows master server
      7.  
        About the nbac_cron utility
      8.  
        Using the nbac_cron utility
    8.  
      Using the Access Management utility
    9. About determining who can access NetBackup
      1.  
        Individual users
      2.  
        User groups
      3.  
        NetBackup default user groups
      4. Configuring user groups
        1.  
          Creating a new user group
        2.  
          Creating a new user group by copying an existing user group
        3.  
          Renaming a user group
        4.  
          Adding a new user to the user group
      5. About defining a user group and users
        1.  
          Logging on as a new user
        2.  
          Assigning a user to a user group
        3.  
          About authorization objects and permissions
    10. Viewing specific user permissions for NetBackup user groups
      1.  
        Granting permissions
      2.  
        Authorization objects
      3.  
        Media authorization object permissions
      4.  
        Policy authorization object permissions
      5.  
        Drive authorization object permissions
      6.  
        Report authorization object permissions
      7.  
        NBU_Catalog authorization object permissions
      8.  
        Robot authorization object permissions
      9.  
        Storage unit authorization object permissions
      10.  
        DiskPool authorization object permissions
      11.  
        BUAndRest authorization object permissions
      12.  
        Job authorization object permissions
      13.  
        Service authorization object permissions
      14.  
        HostProperties authorization object permissions
      15.  
        License authorization object permissions
      16.  
        Volume group authorization object permissions
      17.  
        VolumePool authorization object permissions
      18.  
        DevHost authorization object permissions
      19.  
        Security authorization object permissions
      20.  
        Fat server authorization object permissions
      21.  
        Fat client authorization object permissions
      22.  
        Vault authorization object permissions
      23.  
        Server group authorization object permissions
      24.  
        Key management system (kms) group authorization object permissions
    11.  
      Upgrading NetBackup Access Control (NBAC)
    12.  
      Upgrading NetBackup when an older version of NetBackup is using a root broker installed on a remote machine
  7. Security management in NetBackup
    1.  
      Overview of security certificates in NetBackup
    2.  
      About secure communication in NetBackup
    3. About the Security Management utilities
      1.  
        About login activity
    4. About audit events
      1.  
        Viewing audit events
      2.  
        Audit Events tab
      3.  
        Viewing audit event details
      4.  
        Audit Events Details dialog box
      5.  
        Viewing audit event status
      6.  
        Troubleshooting auditing issues related to the Access History tab
    5. About host management
      1.  
        Hosts tab
      2.  
        Adding host ID to host name mappings
      3.  
        Add or Remove Host Mappings dialog box
      4.  
        Removing host ID to host name mappings
      5.  
        Mappings for Approval tab
      6.  
        Viewing auto-discovered mappings
      7.  
        Mapping Details dialog box
      8.  
        Approving host ID to host name mappings
      9.  
        Rejecting host ID to host name mappings
      10. Adding shared or cluster mappings
        1.  
          About shared or cluster mapping scenarios
      11.  
        Add Shared or Cluster Mappings dialog box
      12.  
        Resetting NetBackup host attributes
      13.  
        Adding or deleting comment for a host
    6. About global security settings
      1.  
        About secure communication settings
      2.  
        Disabling insecure communication
      3.  
        About insecure communication with 8.0 and earlier hosts
      4.  
        About communication with 8.0 or earlier host in multiple NetBackup domains
      5.  
        Automatically mapping host ID to host names and IP addresses
      6.  
        About disaster recovery settings
      7.  
        Setting a passphrase to encrypt disaster recovery packages
      8.  
        Disaster recovery packages
    7. About host name-based certificates
      1.  
        Deploying host name-based certificates
    8. About host ID-based certificates
      1.  
        Web login requirements for nbcertcmd command options
      2. Using the Certificate Management utility to issue and deploy host ID-based certificates
        1.  
          Viewing host ID-based certificate details
      3. About certificate deployment security levels
        1.  
          Configuring the certificate deployment security levels
      4.  
        Automatic host ID-based certificate deployment
      5.  
        Deploying host ID-based certificates
      6.  
        Implication of clock skew on certificate validity
      7. Setting up trust with the master server (Certificate Authority)
        1.  
          Finding and communicating the fingerprint of the certificate authority
      8.  
        Forcing or overwriting certificate deployment
      9.  
        Retaining host ID-based certificates when reinstalling NetBackup on non-master hosts
      10.  
        Deploying certificates on a client that has no connectivity with the master server
      11.  
        About host ID-based certificate expiration and renewal
      12.  
        Deleting sensitive certificates and keys from media servers and clients
      13.  
        Cleaning host ID-based certificate information from a host before cloning a virtual machine
      14. About reissuing host ID-based certificates
        1.  
          Creating a reissue token
        2.  
          Changing the key pair for a host
    9. About Token Management for host ID-based certificates
      1.  
        Creating authorization tokens
      2.  
        Deleting authorization tokens
      3.  
        Viewing authorization token details
      4.  
        About expired authorization tokens and cleanup
    10. About the host ID-based certificate revocation list
      1.  
        Refreshing the CRL on a NetBackup host
    11. About revoking host ID-based certificates
      1.  
        Removing trust between a host and a master server
      2.  
        Revoking a host ID-based certificate
      3.  
        Determining a NetBackup host's certificate state
      4.  
        Getting a list of NetBackup hosts that have revoked certificates
    12.  
      Deleting host ID-based certificates
    13. Security certificate deployment in a clustered NetBackup setup
      1. About deployment of a host ID-based certificate on a clustered NetBackup host
        1.  
          Host ID-based certificate deployment on the active master server node
        2.  
          Host ID-based certificate deployment on inactive master server nodes
      2.  
        Deploying host ID-based certificates on cluster nodes
      3.  
        Revoking a host ID-based certificate for a clustered NetBackup setup
      4.  
        Deploying a host ID-based certificate on a clustered NetBackup setup using reissue token
      5.  
        Creating a reissue token for a clustered NetBackup setup
      6.  
        Renewing a host ID-based certificate on a clustered NetBackup setup
      7.  
        Viewing certificate details of a clustered NetBackup setup
      8.  
        Removing CA certificates from a clustered NetBackup setup
      9.  
        Generating a certificate on a clustered master server after disaster recovery installation
    14.  
      About the communication between a NetBackup client located in a demilitarized zone and a master server through an HTTP tunnel
  8. Data at rest encryption security
    1.  
      Data at rest encryption terminology
    2.  
      Data at rest encryption considerations
    3.  
      Encryption security questions to consider
    4.  
      Comparison of encryption options
    5. About NetBackup client encryption
      1.  
        Installation prerequisites for encryption security
      2. About running an encryption backup
        1.  
          About choosing encryption for a backup
        2.  
          Standard encryption backup process
        3.  
          Legacy encryption backup process
      3.  
        NetBackup standard encryption restore process
      4.  
        NetBackup legacy encryption restore process
    6. Configuring standard encryption on clients
      1.  
        Managing standard encryption configuration options
      2.  
        Managing the NetBackup encryption key file
      3. About configuring standard encryption from the server
        1.  
          About creating encryption key files on the clients
        2.  
          Creating the key files
        3.  
          Best practices for key file restoration
        4.  
          Manual retention to protect key file pass phrases
        5.  
          Automatic backup of the key file
      4.  
        Restoring an encrypted backup file to another client
      5.  
        About configuring standard encryption directly on clients
      6.  
        Setting standard encryption attribute in policies
      7.  
        Changing the client encryption settings from the NetBackup server
    7. Configuring legacy encryption on clients
      1. About configuring legacy encryption from the client
        1.  
          Managing legacy encryption key files
      2. About configuring legacy encryption from the server
        1.  
          About pushing the legacy encryption configuration to clients
        2.  
          About pushing the legacy encryption pass phrases to clients
      3.  
        Restoring a legacy encrypted backup created on another client
      4.  
        About setting legacy encryption attribute in policies
      5.  
        Changing client legacy encryption settings from the server
      6. Additional legacy key file security for UNIX clients
        1.  
          Running the bpcd -keyfile command
        2.  
          Terminating bpcd on UNIX clients
    8.  
      Media server encryption
  9. Data at rest key management
    1.  
      Federal Information Processing Standards (FIPS)
    2.  
      About FIPS enabled KMS
    3. About the Key Management Service (KMS)
      1.  
        KMS considerations
      2.  
        KMS principles of operation
      3.  
        About writing an encrypted tape
      4.  
        About reading an encrypted tape
      5.  
        KMS terminology
    4. Installing KMS
      1.  
        Using KMS with NBAC
      2.  
        About installing KMS with HA clustering
      3.  
        Enabling cluster use with the KMS service
      4.  
        Enabling the monitoring of the KMS service
      5.  
        Disabling the monitoring of the KMS service
      6.  
        Removing the KMS service from monitored list
    5. Configuring KMS
      1.  
        Creating the key database
      2. About key groups and key records
        1.  
          About creating key groups
        2.  
          About creating key records
      3. Overview of key record states
        1.  
          Key record state considerations
        2.  
          Prelive key record state
        3.  
          Active key record state
        4.  
          Inactive key record state
        5.  
          Deprecated key record state
        6.  
          Terminated key record state
      4.  
        About backing up the KMS database files
      5.  
        About recovering KMS by restoring all data files
      6.  
        Recovering KMS by restoring only the KMS data file
      7.  
        Recovering KMS by regenerating the data encryption key
      8.  
        Problems backing up the KMS data files
      9.  
        Solutions for backing up the KMS data files
      10.  
        Creating a key record
      11.  
        Listing keys from a key group
      12. Configuring NetBackup to work with KMS
        1.  
          NetBackup and key records from KMS
        2.  
          Example of setting up NetBackup to use tape encryption
    6. About using KMS for encryption
      1.  
        About importing KMS encrypted images
      2.  
        Example of running an encrypted tape backup
      3.  
        Example of verifying an encryption backup
    7. KMS database constituents
      1.  
        Creating an empty KMS database
      2.  
        Importance of the KPK ID and HMK ID
      3.  
        About periodically updating the HMK and KPK
      4.  
        Backing up the KMS keystore and administrator keys
    8. Command line interface (CLI) commands
      1.  
        CLI usage help
      2.  
        Create a new key group
      3.  
        Create a new key
      4.  
        Modify key group attributes
      5.  
        Modify key attributes
      6.  
        Get details of key groups
      7.  
        Get details of keys
      8.  
        Delete a key group
      9.  
        Delete a key
      10.  
        Recover a key
      11. About exporting and importing keys from the KMS database
        1. Exporting keys
          1.  
            Troubleshooting common errors during an export
        2. Importing keys
          1.  
            Troubleshooting common errors during an import
      12.  
        Modify host master key (HMK)
      13.  
        Get host master key (HMK) ID
      14.  
        Get key protection key (KPK) ID
      15.  
        Modify key protection key (KPK)
      16.  
        Get keystore statistics
      17.  
        Quiesce KMS database
      18.  
        Unquiesce KMS database
      19.  
        Key creation options
    9. Troubleshooting KMS
      1.  
        Solution for backups not encrypting
      2.  
        Solution for restores that do not decrypt
      3.  
        Troubleshooting example - backup with no active key record
      4.  
        Troubleshooting example - restore with an improper key record state
  10. Regenerating keys and certificates
    1.  
      About regenerating keys and certificates
    2.  
      Regenerating NetBackup authentication broker keys and certificates
    3.  
      Regenerating host identity keys and certificates
    4.  
      Regenerating web service keys and certificates
    5.  
      Regenerating nbcertservice keys and certificates
    6.  
      Regenerating tomcat keys and certificates
    7.  
      Regenerating JWT keys
    8.  
      Regenerating NetBackup gateway certificates
    9.  
      Regenerating web trust store certificates
    10.  
      Regenerating VMware vCenter plug-in certificates
    11.  
      Regenerating OpsCenter Administrator Console session certificates
    12.  
      Regenerating OpsCenter keys and certificates
    13.  
      Regenerating NetBackup encryption key file
  11. NetBackup web services account
    1.  
      About the NetBackup web services account
    2.  
      Changing the web service user account

Multi-datacenter with Media Server Encryption Option (MSEO)

A multi-datacenter with Media Server Encryption Option (MSEO) is defined as a medium to large group of hosts (greater than 50) that span two or more geographic regions. The hosts are connected by a Wide Area Network (WAN). In this example, one datacenter is located in London and the other datacenter is located in Tokyo. Both datacenters are connected through a dedicated WAN connection.

This multi-datacenter example can typically include more than 50 hosts. All externally facing hosts use the Media Server Encryption Option (MSEO). In this example, clients use both encrypted backups for some clients and the MSEO option for other hosts. Data that is too sensitive to be archived off-site is "left at rest" in an unencrypted format.

The multi-datacenter with Media Server Encryption Option (MSEO) includes the following highlights:

  • NetBackup spans two or more geographic regions through a WAN

  • Newer option in NetBackup

  • Useful for protecting off-site data

  • Data is still sent from the client in the clear, implying that passive wire interception is an acceptable risk

  • Key management and encryption are managed in a central location equating to a single point of failure. Using the high availability cluster can help.

  • Media server needs to be robust to handle multiple clients at once

  • Useful where you need to send encrypted tapes off-site but want to off load encryption from the client, which is CPU intensive

  • Must have keys to get data back. Lost keys means lost data. (See information on key share backup in the Encryption Chapter.)

Figure: Multi-datacenter with Media Server Encryption Option (MSEO) shows an example multi-datacenter with Media Server Encryption Option (MSEO).

Figure: Multi-datacenter with Media Server Encryption Option (MSEO)

Multi-datacenter with Media Server Encryption Option (MSEO)

The following table describes the NetBackup parts that are used for a multi-datacenter with MSEO implemented.

Table: NetBackup parts for a multi-datacenter with MSEO implemented

Part

Description

London datacenter

Contains the master server, media server 1, MSEO 1, clients 1, 2, 3, and client 5 Web server in the DMZ. The London datacenter also contains the encrypted data tape for clients 1, 2, 3, and unencrypted data tape for client 5. The London datacenter connects to the Tokyo datacenter through a dedicated WAN connection.

Tokyo datacenter

Contains the media server 2, MSEO 2, clients 8, 9 and client 11 Web server in the DMZ. The Tokyo datacenter also contains the encrypted data tape for clients 8, 9, and unencrypted data tape for client 11. The Tokyo datacenter connects to the London datacenter through a dedicated WAN connection.

Wide Area Network (WAN)

Specifies that the dedicated WAN link connects the London datacenter to the Tokyo datacenter. The WAN provides connectivity between the master server in London to media server 2 with clients 8, 9, 11 in Tokyo.

Master server

Specifies that the master server that is located in the London datacenter, communicates with media server 1 and clients 1, 2, 3, and 5. The master server also uses the WAN to communicate with media server 2, and clients 8, 9, and 11 in Tokyo.

Media servers

Specifies that this multi-datacenter uses two media servers. Media server 1 is located in the London datacenter and media server 2 is located in the Tokyo datacenter. In London, media server 1 communicates with the master server, MSEO 1, and clients 1, 2, 3, and 5. Media server 1 writes unencrypted data to tape for client 5. Media server 1 also uses MSEO 1 to write encrypted data to tape for clients 1, 2, and 3. The encrypted tape is transported off-site to a vault in London.

In Tokyo, media server 2 communicates with the master server in London through the WAN and clients 8, 9, and 11 in Tokyo. Media server 2 writes unencrypted data to tape for client 11. Media server 2 also uses MSEO 2 to write encrypted data to tape for clients 8 and 9. The encrypted tape is transported off-site to a vault in Tokyo.

MSEOs

Specifies that the two MSEO hardware appliances off-load encryption from individual clients. The individual client CPU performance is improved (relative to client side encryption) by using the MSEO appliance. The MSEO 1 is in the London datacenter and MSEO 2 is in the Tokyo datacenter. The MSEO 1 generates an encrypted data tape for clients 1, 2, and 3 that can be stored off-site in London. The MSEO 2 generates an encrypted data tape for clients 8 and 9 that can be stored off-site in Tokyo.

Tapes

Specifies that both the unencrypted and encrypted data tapes are produced in the London datacenter and in the Tokyo datacenter. The encrypted tape contains MSEO encrypted backup data. In London, the unencrypted tape is written for client 5 and stored on-site at the London datacenter. The encrypted tape is written for clients 1, 2, and 3. The encrypted tape for clients 1, 2, and 3 is transported off-site to a vault in London for disaster recovery protection.

In Tokyo, the unencrypted tape is written for client 11 and stored on-site at the Tokyo datacenter. The encrypted tape is written for clients 8 and 9. The encrypted tape for clients 8 and 9 is transported off-site to a vault in Tokyo for disaster recovery protection.

Note:

To decrypt the data, the key(s) used to encrypt the data must be made available.

Transports

Specifies that there are two transports. One transport is located in London and the other is located in Tokyo. The transport truck in London moves the encrypted tape for clients 1, 2, and 3 off-site to a secure London vault facility. The transport truck in Tokyo moves the encrypted tape for clients 8 and 9 off-site to a secure Tokyo vault facility.

Note:

If a tape is lost during transport, the datacenter manager has potentially reduced the risk of a data breach. This breach has been reduced through the use of data encryption.

Vaults off-site

Specifies that there are two vaults that are located off-site. One vault is located in London and the other is located in Tokyo. Both vaults provide safe encrypted tape storage facilities off-site at different locations than the datacenters.

Note:

Good disaster recovery protection promotes having the encrypted tapes stored at locations separate from the datacenters.

Clients

Specifies that clients are located in both the London and Tokyo datacenters. In London, clients 1, 2, and 3 are of the MSEO type and client 5 is a Web server type (not using MSEO) that is located in the DMZ. Both server types can be managed by the master server. And they can have their encrypted data backed up to tape through media server 1 attached MSEO hardware appliance. Client 5 communicates to NetBackup using NetBackup only ports through the internal firewall. Client 5 receives connections from the Internet using HTTP only ports through the external firewall.

Tokyo clients 8 and 9 are of the MSEO type. Client 11 is a Web server type (not using MSEO) located in the DMZ. Both server types can be managed by the master server located in London. And they can have their encrypted data backed up to tape through media server 2 attached MSEO hardware appliance. Client 11 communicates to NetBackup using NetBackup only ports through the internal firewall. Client 5 receives connections from the Internet using HTTP only ports through the external firewall.

Internal firewalls

Specifies that the multi-datacenter can use two internal firewalls. One internal firewall is located in London and the other is located in Tokyo. In London, the internal firewall can use NetBackup to access client 5, Web server, located in the DMZ. The Tokyo internal firewall can use NetBackup to access client 11, Web server, in the DMZ. Only selected NetBackup ports and possibly other application ports are enabled for data communication into and out of the DMZ. Other HTTP ports can be open in the external firewall but cannot pass through the internal firewall.

Demilitarized Zones (DMZs)

Specifies that the multi-datacenter can use two DMZs. One DMZ is located in London and the other is located in Tokyo. In London, the DMZ provides a "safe" area of operation for the Web server client 5 that exists between the internal firewall and external firewall. The Web server client 5 in the DMZ can communicate to NetBackup through the internal firewall using designated NetBackup ports. The Web server client 5 can also communicate through the external firewall to the Internet using only HTTP ports.

In Tokyo, the DMZ provides a "safe" area of operation for the Web server client 11 that exists between the internal firewall and external firewall. The Web server client 11 in the DMZ can communicate to NetBackup through the internal firewall using designated NetBackup ports. The Web server client 11 can also communicate through the external firewall to the Internet using only HTTP ports.

External firewalls

Specifies that the multi-datacenter with MSEO can use two external firewalls. One external firewall is located in London and the other is located in Tokyo. In London, the external firewall lets external users access the Web server client 5 located in the DMZ from the Internet over HTTP ports. The NetBackup ports are not allowed to pass through the external firewall to the Internet. Only the HTTP ports of Web server client 5 can pass through the external firewall to the Internet.

In Tokyo, the external firewall lets external users access the Web server client 11 located in the DMZ from the Internet over HTTP ports. The NetBackup ports are not allowed to pass through the external firewall to the Internet. Only the HTTP ports of Web server client 11 can pass through the external firewall to the Internet.

Internet

Specifies that there is only one Internet but two Internet connections in this multi-datacenter example. One Internet connection is located in London and the other is located in Tokyo. The Internet is a collection of interconnected computer networks that are linked by copper wires, fiber-optic cables, and wireless connections. In London, the Web server client 5 can communicate over the Internet using HTTP ports through the external firewall. In Tokyo, the Web server client 11 can communicate over the Internet using HTTP ports through the external firewall.