Residential Routers

• There is a market segment for small cheap routers that do NAT and a bunch of other things

• Most of these devices support:

• • NAT with support for various applications
  • Privately-addressed servers
  • VPN pass-through
  • Wireless access point
  • 100 Mb Ethernet switch
  • DHCP server
  • MAC address filtering
  • Remote administration
  • Firewall

• Some newer devices have an embedded Voice over IP (VoIP) gateway

• • Breaks the VoIP signaling into two legs
  • Avoids the need for translating SIP packets