The DNS server implementation must authenticate the other DNS server before responding to a server-to-server transaction.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-205203	SRG-APP-000394	SRG-APP-000394-DNS-000049	SV-205203r961503_rule	2024-07-02	4

Description
Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. Device authentication is a solution enabling an organization to manage devices. It is an additional layer of authentication ensuring only specific pre-authorized devices can access the system. This requirement applies to server-to-server (zone transfer) transactions only and is provided by TSIG/SIG(0), which enforces mutual server authentication using a key that is unique to each server pair (TSIG) or using PKI-based authentication (SIG(0)).

Description

Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. Device authentication is a solution enabling an organization to manage devices. It is an additional layer of authentication ensuring only specific pre-authorized devices can access the system. This requirement applies to server-to-server (zone transfer) transactions only and is provided by TSIG/SIG(0), which enforces mutual server authentication using a key that is unique to each server pair (TSIG) or using PKI-based authentication (SIG(0)).

ℹ️ Check
Review the DNS server implementation configuration to determine if the DNS server authenticates the other DNS server before responding to a server-to-server transaction. If the DNS server does not authenticate the other DNS server, this is a finding.

✔️ Fix
Configure the DNS server to authenticate the other DNS server before responding to a server-to-server transaction.