Nortel Networks NB5PLUS4/W - Manual (Page 93)

YML754 Rev1 NB5Plus4/W User Guide
www.netcomm.com.au 
• DHCP Server/Relay/Client
• DNS Relay Agent
• DMZ Support
• Single session IP Sec and PPTP/L2TP VPN pass-through support
• PPP Always on with configurable timeout
VoIP
• SIP version 1 & 2, H.323, MGCP
• QoS support for voice packets
SECURITY
• NAT for Basic Firewall and sharing
• Packet Filtering Firewall Support
• Stateful Packet Inspection Support
• Protection against Denial of Service attacks
• Password Authentication to Modem
MANAGEMENT SUPPORT