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Download for TL-ER5120 V4

Please choose hardware version:

V4

>How to find the hardware version on a TP-Link device?

IMPORTANT: Model and hardware version availability varies by region. Please refer to your TP-Link regional website to determine product availability.
Product Overview
Manual

FAQs

Firmware

A firmware update can resolve issues that the previous firmware version may have and improve its current performance.

To Upgrade

IMPORTANT: To prevent upgrade failures, please read the following before proceeding with the upgrade process

  • Please upgrade firmware from the local TP-Link official website of the purchase location for your TP-Link device, otherwise it will be against the warranty. Please click here to change site if necessary.
  • Please verify the hardware version of your device for the firmware version. Wrong firmware upgrade may damage your device and void the warranty. (Normally V1.x=V1)
    How to find the hardware version on a TP-Link device?
  • Do NOT turn off the power during the upgrade process, as it may cause permanent damage to the product.
  • To avoid wireless disconnect issue during firmware upgrade process, it's recommended to upload firmware with wired connection unless there is no LAN/Ethernet port on your TP-Link device.
  • It's recommended that users stop all Internet applications on the computer, or simply disconnect Internet line from the device before the upgrade.
  • Use decompression software such as WinZIP or WinRAR to extract the file you download before the upgrade.
TL-ER5120(UN)_V4_20200313
Published Date: 2020-06-28 Language: English File Size: 15.21 MB

New Feature/Enhancement:

1.  Upgrade webserver's HTTPS encryption suite TLS version to 1.2.

2.  Add support DHCP Option 66, Option 150, Option 159, Option 160, Option 176 and Option 242.

3.  One-to-One NAT supports the loopback function of the WAN port.

4.  Add HTTPS web server enable/disable button.

5.  Support to obtain SNMP information through WAN port and VPN connection.

6.  Support forward IPv4 Local Scope IP address as 239.255.0.0/16.

7.  Optimize the mechanism of the session limit function.

8.  Firewall optimization for PCI DSS vulnerability scanning.

9.  Optimized the MAC address (WAN/LAN port) modification mechanism. If the MAC address in the backup file is not modified, the device will keep the default MAC address after restoring the backup file.

10.  Optimize the DHCP Server mechanism, LAN devices can obtain IP addresses faster.

11.  UPnP supports adding random codes to URL to prevent DNS Rebinding attacks.

12.  Daylight saving time is adjusted from GMT to UTC.

13.  Security vulnerability optimization.

 

Bug Fixed:

1.  Fix the bug that URL Filtering is unsuccessful when accessing a website subdirectory with “/”.

2.  Fix the bug that the backup WAN port will not restore PPPoE dialing automatically when deleting the Link Backup entries.

3.  Fix the bug that LAN PC may not be able to upload data to an external server.

4.  Fix the bug that the UPnP NewExternalIPAddress interface cannot correctly obtain the IP address of WAN port.

5.  Fix the bug that VPN cannot be used after creating multiple IPSec VPN entries.

6.  Fix the bug that the VPN cannot be used normally after opening the DMZ function.

7.  Fix the bug that the VPN clients at both ends of the IPSec VPN may not be able to communicate with each other after restarting the router or modifying the WAN mode.

 

 

Notes:

1. For TL-ER5120 (UN) 4.0 only.

2. Your device's configuration won't be lost after upgrading.

TL-ER5120(UN)_V4_20180706
Published Date: 2018-08-21 Language: English File Size: 15.12 MB

Modifications and Bug Fixes:

First firmware released
Notes: For TL-ER5120(UN) V4.0

To Use Third Party Firmware In TP-Link Products

Some official firmware of TP-Link products can be replaced by the third party firmware such as DD-WRT. TP-Link is not obligated to provide any maintenance or support for it, and does not guarantee the performance and stability of third party firmware. Damage to the product as a result of using third party firmware will void the product's warranty.

Open Source Code For Programmers (GPL)

Please note: The products of TP-Link partly contain software code developed by third parties, including software code subject to the GNU General Public Licence (“GPL“), Version 1/Version 2/Version 3 or GNU Lesser General Public License ("LGPL"). You may use the respective software condition to following the GPL licence terms.

You can review, print and download the respective GPL licence terms here. You receive the GPL source codes of the respective software used in TP-Link products for direct download and further information, including a list of TP-Link software that contain GPL software code under GPL Code Center.

The respective programs are distributed WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the respective GNU General Public License for more details.

T2700G-28TQ License Download
License Model: T2700G-28TQ-L1000

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