The SSH daemon must be configured for IP filtering.

From Oracle Linux 5 Security Technical Implementation Guide

Part of GEN005540

Associated with: CCI-000366

SV-64101r1_rule The SSH daemon must be configured for IP filtering.

Vulnerability discussion

The SSH daemon must be configured for IP filtering to provide a layered defense against connection attempts from unauthorized addresses.

Check content

Check the TCP wrappers configuration files to determine if sshd is configured to use TCP wrappers. Procedure: # grep sshd /etc/hosts.deny # grep sshd /etc/hosts.allow If no entries are returned, the TCP wrappers are not configured for sshd, this is a finding.

Fix text

Add appropriate IP restrictions for SSH to the /etc/hosts.deny and/or /etc/hosts.allow files.

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