Configuring Firewalls for OT Networks

Configuration, testing and commissioning of firewalls for OT networks

What is the function of a firewall?

Firewalls are networked devices consisting of hardware and/or software for segmenting networks and preventing unauthorized access to critical ICS assets. However, a firewall is only as good as its configuration. Proper configuration of firewalls requires not only a skilled operator trained on the particular brand of firewall but also requires considerable understanding of process control network,  industrial protocols and control system applications. Small mistakes can render a firewall worthless as a security appliance.

aeSolutions has extensive experience in designing, configuring and commissioning firewalls in industrial applications. We have experience in all major brands of firewalls, whether they be general-purpose IT firewalls used to segregate the ICS networks from company business networks or industrial firewalls used to protect individual zones and conduits.  Our team has experience with firewalls from a variety of manufacturers such as Tofino, Phoenix Contact mGuard,  Cisco ASA, SonicWall, Siemens Scalance, Downstream, etc.

Description of the Service

A typical firewall configuration service includes both offsite analysis and onsite visits:

  • Project Planning, preparation, and status updates
  • Modifying and updating firmware
  • Firewall rules rationalization
  • Configure and Testing of rules and devices
  • Evaluate/Fine tune rules based on Syslog & other testing
  • Help develop roll out planning and further status updates

Service Deliverables

-Configured and commissioned firewall

-Training and documentation for administering and maintaining the firewall




Description of the Service

Configured and commissioned firewall