Firewall
You may know varies firewall terms;
Stateful, Application Proxy and UTM
You may need VPN; IPSec, SSL, etc.
And, you may want to do firewall analysing/reporting
Web Filtering
By categories, user IPs, time schedule and more?
Appliance or software solution?
Management reports? Monitoring or access controlling? IM control? Or else?
Intrusion Detection/Prevention System (IDS/IPS)
IDS, IPS or IDPS are appliances can monitor your network and systems
activities for malicious activity IDP also can identify malicious
activity, log the information of activity, attempt to block/stop
activity, and report activity
Client and Server Security
Server side anti-virus, application protection, etc.
Client side PC anti-virus, personal firewall, IPS, etc.
Even mobile device anti-virus and network protection