Proroute
GEM
2M
4G
Router
GEM-2M series User Manual
52
example, if you set a mail server at LAN side, your local devices can access this
mail server through gateway’s WAN IP address. You don’t need to change IP
address of mail server no matter you are at local side or go out. This is useful
when you run a server inside your network.
3.1.4.2 Virtual Server & Virtual Computer
3.1.4.2.1 Virtual
Server
This gateway’s NAT firewall filters out unrecognized packets to protect your Intranet,
so all hosts behind this device are invisible to the outside world. If you wish, you can
make some of them accessible by enabling the Virtual Server Mapping. Press “Add”
button to add new rule for Virtual Server.
A virtual server is defined as a
Public Port
, and all requests to this port will be
redirected to the computer specified by the
Server IP.
Virtual Server can work with
Scheduling Rules
, and give user more flexibility on Access control. For the details,
please refer to
[System]-[Scheduling]
.
For example, if you have an
FTP server (Service port 21) at 10.0.75.1
, a
Web
server1 (Service port 80) at 10.0.75.2,
a
Web server2 (Service Port 8080 and
Private port 80) at 10.0.75.3,
and a
VPN server at 10.0.75.6,
then you need to
specify the following virtual server mapping table
Public Port
Server IP
Private Port
Protocol
Rule
21 10.0.75.1
TCP
Enable
80 10.0.75.2
TCP
Enable
8080 10.0.75.3
80
TCP
Enable
1723 10.0.75.6
Both
Enable
