ZyXEL B-101 User Guide - Page 190
NAT Application
View all ZyXEL B-101 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 190 highlights
Chapter 12 Network Address Translation (NAT) 12.8.4 NAT Application The following figure illustrates a possible NAT application, where three inside LANs (logical LANs using IP alias) behind the ZyXEL Device can communicate with three distinct WAN networks. Figure 74 NAT Application With IP Alias Port Forwarding: Services and Port Numbers The most often used port numbers are shown in the following table. Please refer to RFC 1700 for further information about port numbers. Please also refer to the Supporting CD for more examples and details on port forwarding and NAT. Table 52 Services and Port Numbers SERVICES ECHO FTP (File Transfer Protocol) SMTP (Simple Mail Transfer Protocol) DNS (Domain Name System) Finger HTTP (Hyper Text Transfer protocol or WWW, Web) POP3 (Post Office Protocol) NNTP (Network News Transport Protocol) SNMP (Simple Network Management Protocol) PORT NUMBER 7 21 25 53 79 80 110 119 161 190 VSG1432-B101 Series User's Guide