Linksys WRT1900ACS v2.0 Router Firmware 2.0.1.182461

Firmware Release Notes:

- Integrated fixes for security vulnerabilities related to PPPoE discovery, .cgi pages and JNAP requests.
- Fixed an issue where the wrong password was displayed in the Wireless bridge/repeater settings page
- Added DHCP Request messages to the DHCP client log
- Fixed DHCP Reservation functionality when the local network configuration is changed
- Added support for special characters and Chinese characters in the SSID name
- The Turkey time zone is moved from GMT+02 to GMT+03
- Fixed a Parental Controls bug where some devices were not properly blocked
- The ESP protocol is now supported for ingress IPv6 ESP frames
- Added support for IPv6 connections when the prefix is not 64-bit
- Added support for an IPv6 inbound UDP port for XBox
- Updated the wireless driver to drv_7.2.9.2.p9_fw_7.2.9.26

Performing the Linksys router upgrade:

Step 1: Access the router’s web-based setup page.

IMPORTANT:

Make sure to enter the correct router Internet Protocol (IP) Address in accessing the router’s web-based setup page. The default router IP Address is 192.168.1.1. If this address does not work, it might have been changed when the router was set up so you need to check the new IP Address. If you still can't access the web-based setup page, try resetting the device. This will restore your router to factory defaults.

NOTE:

If you encounter a "502 Error" or Bad Gateway Error​, you can perform a manual firmware upgrade by bypassing Smart Setup to solve the issue.
Step 2: Click on Administration > Firmware Upgrade.
Step 3: Click the Browse… button.
Step 4: Locate and select the file that you have downloaded then click Open.

NOTE:

If you are using Mac OS X, click the Choose button.
Step 5: Click the Start Upgrade button.
A warning prompt stating not to interrupt the upgrade will appear.
However, if you selected the incorrect file a prompt similar to the image below will appear. If this happens, click the OK button and repeat Steps 2 to 4 and select the correct file.
Step 6: Click Continue when it prompts that the upgrade has been successful.
Step 7: Powercycle the router by unplugging it from the power outlet for 10 seconds, then re-plug it.

IMPORTANT:

- The safest way to perform the firmware upgrade is to use a wired computer.
- DO NOT power cycle the Router during the firmware upgrade process.  

About Router Firmware:

Before you consider downloading this firmware, go to the system information page of the router and make sure that the currently installed version isn't either newer or matching this release.

Due to the large variety of router models and different methods for upgrading the device, it is highly recommended that you read and, above all, understand the installation steps before you apply the new firmware, even if you are a power user.

In theory, these steps shouldn't be much of a hassle for anyone, because manufacturers try to make them as easy as possible, even if they don't always succeed. Basically, you must upload the new firmware to the router through its administration page and allow it to upgrade.

If you install a new version, you can expect increased security levels, different vulnerability issues to be resolved, improved overall performance and transfer speeds, enhanced compatibility with other devices, added support for newly developed technologies, as well as several other changes.

If you're looking for certain safety measures, remember that it would be best if you perform the upload using an Ethernet cable rather than a wireless connection, which can be interrupted easily. Also, make sure you don't power off the router or use its buttons during the installation, if you wish avoid any malfunctions.

If this firmware meets your current needs, get the desired version and apply it to your router unit; if not, check with our website as often as possible so that you don't miss the update that will improve your device.

  It is highly recommended to always use the most recent driver version available.

Try to set a system restore point before installing a device driver. This will help if you installed an incorrect or mismatched driver. Problems can arise when your hardware device is too old or not supported any longer.