... CLI) High-performance Support multiple WAN access methods, including static IP, DHCP, L2TP, PPTP, PPPOE, 4G. LTE/ 3G/HSPA+ Support double ... . Support link disconnection when timeout Support APN/VPDN Support DHCP server and client, firewall, NAT, DMZ host, URL block, QoS, ttraff ... link speed statistics etc. Full protocol support, such as TCP/IP, UDP, ICMP, SMTP, HTTP, POP3, OICQ, TELNET, FTP, SNMP, ...