Opengear CMS7100 Series Quick Start Manual page 7

8. CHANGE ACCESS & FIREWALL SETTINGS
The console server's firewall controls which protocols and services can
access which ports and devices. By default, the firewall only allows
HTTPS and SSH access. To change settings, click System > Services
and click the Service Access tab.
To permit IP access between devices
on the network or management LAN,
click System > Firewall. Click on the
Forwarding & Masquerading tab, make
your changes, and click Apply.