Operation Manual – NAT-URPF-VPLSH3C S9500 Series Routing Switches Chapter 1 NAT Configuration1-6as that for an FTP server. You can even use 202.110.10.12:8080 as the public addressfor an internal WWW server.1.2.5 Configuring Nonstandard FTP Internal ServerA nonstandard FTP internal server is different from a common FTP internal server inthat its private network port can use other ports in addition to the default port of FTP,namely port 21. In the configuration of a standard FTP internal server, the publicnetwork can use ports ranging from port 0 to port 12287, but its private network mustuse port 21 in order to be identified as an FTP internal server; In a nonstandard FTPinternal server, the public network port is still from port 0 to port 12287 and the privatenetwork port is from port 0 to port 65535. Note that other identified ports except thedefault port 21 cannot be used.1.2.6 Special Protocols Supported by NATThe special protocols supported by NAT include ICMP (Internal Control MessageProtocol), DNS (Domain Name System), ILS (Internet Locator Service), H.323, andFTP (File Transfer Protocol).1.3 NAT ConfigurationThe following table describes the NAT configuration tasks.Table 1-2 NAT configurationConfiguration Item Command DescriptionEnter the system view system-view -Configure an addresspoolnat address-group group-numberstart-addr end-addr RequiredEnter the VLANinterface view interfacevlan-interface vlan-id -Configure NATnat outbound acl-number[ address-group group-number[ no-pat ] ] slot slotnoRequired,implementdifferent NATmodes byconfiguringdifferentparameters
