It's more likely that you'll need a router between your firewall and the Internet. In this location, a router can screen out an Internet stream's obvious "junk traffic" before it reaches the firewall. You can use the router to apply broad firewall rules across the enterprise. For example, if you don't allow any SSH traffic through the firewall, you can drop all inbound port 22 traffic at the router, letting the firewall focus on arbitrating...
Some firewalls do act as proxy servers, but only if they are specifically designed as Layer 7, or application-layer firewalls. Consider the case where an internal user wishes to access an external Web site. The proxy firewall transparently inserts itself into the conversation, completing the three-way handshake with the end user, determining whether the traffic is allowed, and then completing a separate three-way handshake with the destination system.
Dig Deeper on Network Firewalls, Routers and Switches
Related Q&A from Mike Chapple, Enterprise Compliance
The HHS security risk assessment tool is designed to help healthcare providers meet the HIPAA security requirement. Expert Mike Chapple explains how ...continue reading
PCI DSS requirement 6.6 demands application security compliance through one of two options: an application firewall or a code review. Expert Mike ...continue reading
Are HIPAA-compliant hosting services a better option for compliance than a secure storage API? Expert Mike Chapple analyzes.continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.