Nortel Networks NB5PLUS4/W User Manual

•  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