Skills Covered by this Module

• General Internet Connectivity concepts.
• Using the Firewall Checker as a first check to identify Firewall Configuration errors or warnings.
• Firewall Configuration – Port Forwarding.
• Firewall Configuration – Quality of Service (QoS).

Relevant Course Materials

• A Guide to QoS
• Ports used by 3CX PhoneSystem
• External & Internal devices: Network Topology
• Sip Proxy Tunnel & Sip Proxy Tunnel Manager
• What is the firewall checker and why do I need it?
• How do I configure a CISCO router for to allow connection to a VOIP provider
• Why does 3CX require static port mappings (Full Cone NAT)?
• How do I configure my Linksys router for 3CX Phone System?
• Is Microsoft ISA server supported as a firewall?
• When and How can I switch off STUN Resolution?