D-Link DSL-2877AL Dual Band Wireless AC750 VDSL/ADSL2+ Modem Router User Manual

Section 3 - Web User Interface Configuration

Page 59

2.4G Multiple WLAN SSIDs

The SSID is name of your WLAN. Try to avoid using standard term, e.g. WLAN, as

SSID.

The DSL-2877AL supports Multiple SSIDs so you can operate several WLAN in

parallel.

D-Link DSL-2877AL Dual Band Wireless AC750 VDSL/ADSL2+ Modem Router User Manual

Section 3 - Web User Interface Configuration

Page 60

5G Multiple WLAN SSIDs

The SSID is name of your WLAN. Try to avoid using standard term, e.g. WLAN, as

SSID.

The DSL-2877AL supports Multiple SSIDs so you can operate several WLAN in

parallel.

D-Link DSL-2877AL Dual Band Wireless AC750 VDSL/ADSL2+ Modem Router User Manual

Section 3 - Web User Interface Configuration

Page 61

2.4G WLAN Performance

Please note: The position of the DSL-2877AL may influence the performance,

specially the range of the radio signal. Always change just one parameter and keep

track of the effects.

Threshold for Fragmentation

Default value: 2346. Threshold for breaking down of data packets; measured in bytes.

Data packets large than 2,346 bytes are broken down before transmission. Generally

there is no need to change this value, except for a huge packet error rate. Change

the value within the range between 256 and 2,346.

Please note: Choosing a low value for fragmentation may result in bad data transfer

rates.

5G WLAN Performance

Please note: The position of the DSL-2877AL may influence the performance,

specially the range of the radio signal. Always change just one parameter and keep

track of the effects.

D-Link DSL-2877AL Dual Band Wireless AC750 VDSL/ADSL2+ Modem Router User Manual

Section 3 - Web User Interface Configuration

Page 62

Virtual Server

To access the

Virtual Server

page, click on the

Advanced

menu link at the top, and then click on the

Virtual Server

menu link on the left.

On this page the user can configure advanced services related to the virtual server

connectivity of this product.

The DSL-2877AL externally acts as server. It receives the requests of remote users

under its public IP address and forwards them automatically to the Virtual Server. So

a client in your network behind NAT or firewall can provide services as a Virtual

Server. You just have to enable specific ports or port ranges and protocols

(UDP/TCP). File sharing or web services for e.g. HTTP, FTP or POP3 are possible.

The private IP addresses of the servers in the local network remain safe. If you have

a dynamic IP address, you may want to enable DynDNS additionally.

A Virtual Server is defined as service port. All requests to this port of your external IP

address are forwarded to a certain internal IP address, e.g. requests via FTP or

POP3. Enable firewall SPI before use virtual server. Use the Virtual Server to forward

hack attacks via HTTP to your HTTP server in the DMZ.

Example

You want to set up one FTP server, one Web server and an VPN server for your

LAN.

Add 3 new rules:

Name of rule Protocol Start Port End Port IP Address

FTP server

TCP

21

21

192.168.1.5

Web server

TCP

80

80

192.168.1.6

VPN server

TCP

1723

1723

192.168.1.7

Link the IP addresses (see last column) with the new rules accordingly.

Add a Rule



Input data.



Click on the

“

Apply" button.

Edit a Rule



Click on the radio box in the list entry.

D-Link DSL-2877AL Dual Band Wireless AC750 VDSL/ADSL2+ Modem Router User Manual

Section 3 - Web User Interface Configuration

Page 63



Edit the rule in the top field

Click on the

“

Apply" button.

Delete a Rule



Click on the checkbox in the list entry.



Confirm the warning dialog by clicking on the "Remove Selected" button.

The rule will be deleted.