D-Link DSR-250N - Application Port Forwarding; Figure 101: List of Configured Resources, Which Are Available to Assign to SSL VPN Policies

Unified Services Router User Manual
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Figure 101: List of configured resources, which are available to assign to
SSL VPN policies
7.3 Application Port Forwarding
Setup > VPN Settings > SSL VPN Server > Port Forwarding
Port forwarding allows remote SSL users to access specified network applications or
services after they login to the User Portal and launch the Port Forwarding service.
Traffic from the remote user to the router is detected and re-routed based on
configured port forwarding rules.
Internal host servers or TCP applications must be specified as being made accessible
to remote users. Allowing access to a LAN server requires entering the local server IP
address and TCP port number of the application to be tunneled. The table below lists
some common applications and corresponding TCP port numbers:
TCP Application
Port Number
FTP Data (usually not needed) 20
FTP Control Protocol
21
SSH
22
Telnet
23
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