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The AIX DHCP client must not send dynamic DNS updates.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-215427 | AIX7-00-003132 | SV-215427r508663_rule | Medium |
| Description |
|---|
| Dynamic DNS updates transmit unencrypted information about a system including its name and address and should not be used unless needed. |
| STIG | Date |
|---|---|
| IBM AIX 7.x Security Technical Implementation Guide | 2021-11-19 |
Details
| Check Text ( C-16625r294732_chk ) |
|---|
| If AIX does not use DHCP client, this is Not Applicable. Determine if the system's DHCP client is configured to send dynamic DNS updates: # grep "^updateDNS" /etc/dhcpc.opt /etc/dhcpcd.ini If any lines are returned, this is a finding. |
| Fix Text (F-16623r294733_fix) |
|---|
| Configure the system's DHCP client to not send dynamic DNS updates. Remove or comment-out "updateDNS" lines from the "/etc/dhcpcd.ini" and "/etc/dhcpc.opt" files. |