The SSH daemon must be configured for IP filtering.

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECSC-1

Associated with: CCI-000366

SV-38955r1_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 and this is a finding.

Fix text

Add appropriate IP restrictions for SSH to the /etc/hosts.deny and/or /etc/hosts.allow files. TCP Wrappers can be installed using SMIT from the AIX expansion pack as fileset netsec.options.tcpwrappers.

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