Ransomware attackers specifically target and attempt to destroy backup systems to increase the probability of payment. Hardening your system is critical. Please ensure you have reviewed your platform security using the Security Hardening Checklist
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  1. Home
  2. NetBackup and NetBackup Appliances Hardening Guide
  3. Steps to protect Flex Appliance
  4. Configuring an isolated recovery environment using the web UI
  5. Configuring the allowed subnets
NetBackup and NetBackup Appliances Hardening Guide

Configuring the allowed subnets

Allowed subnets are like a firewall. Any hosts that are not in the allowed subnets has no access to the IRE MSDP server. Ensure that the IRE primary server is in the allowed subnets, otherwise you lose the control to the IRE MSDP server from the web UI. The computer you use to configure the IRE also must be in the allowed subnets.

To configure the allowed subnets

  1. On the left, click Storage > Disk storage.
  2. Click the Storage servers tab.
  3. Click on the MSDP storage server that you want to configure.
  4. Under Isolated Recovery Environment > Allowed subnets, click Add subnet.
  5. Select IPv4 or IPv6 and type the IP address of the subnet and click Add to list.
  6. Add all the subnets in the IRE domain that are required to access the MSDP server and click Save.

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