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NETGEAR ProSafe SSL VPN Concentrator 25 SSL312 Reference Manual
Configuring the SSL VPN Tunnel Client and Port Forwarding 6-7
v1.1, November 2006
3. In the TCP Port field, enter the TCP port number of the application to be tunneled. The table
below lists many commonly used TCP applications and port numbers (see
http://www.iana.org for a more complete list of registered port numbers).
4. Click Apply. The IP address and port number submitted appear in the Configured Applications
for Port Forwarding table.
Configuring Host Name Resolution
Once the server and port information has been configured, remote users will be able to access
private network servers using Port Forwarding. As a convenience for users, the SSL VPN
Concentrator administrator can also specify host name to IP address resolution for network
servers. Host Name Resolution allows users to access TCP applications at familiar addresses such
as mail.mycompany.com or ftp.mycompany.com rather than by IP addresses.
To add a host name for client name resolution:
1. In the Configured Host Names for Port Forwarding section, enter an IP address in the Local
Server IP Address field. The address should already be defined in the Configured Applications
for Port Forwarding table.
2. In the Fully Qualified Domain Name field, enter a domain name of the internal server.
Table 6-1. Port Forwarding Applications/TCP Port Numbers
TCP Application Port Number
FTP Data (usually not needed) 20
FTP Control Protocol 21
SSH 22
a
a. Users can specify the port number together with the host name or
IP address.
Telnet 23
a
SMTP (send mail) 25
HTTP (web) 80
POP3 (receive mail) 110
NTP (network time protocol) 123
Citrix 1494
Terminal Services 3389
VNC (virtual network computing) 5900 or 5800