Hi,
To enable users to access network extension services through the Firefox, Chrome browser, the network administrator needs to upload the SecoClient software on the System > VPN Client Upgrade page of the FW web UI. In addition, only the network extension services can be configured on the virtual gateway of the FW. The certificate authentication mode cannot be configured there.
When the preceding conditions are met and if a user accesses the virtual gateway login page through a browser, the system prompts the user to download and install the SecoClient software. In V600R007C00 and later versions, the device supports access to the virtual gateway login page through Chrome (42 or later) or Firefox (52 or later). In this case, you need to install the corresponding extension plug-in as prompted and install SecoClient 7.0.2 or later. After the SecoClient software is installed, the user can access network extension services after refreshing the login page. If the current operating system of the user does not support the installation of the SecoClient software, the user cannot access network extension services through the Firefox, Chrome browser.
Besides, if the error consists while using the IE browser, please make sure you are using the IE 6/7/8/9/10/11.
2. On other v-gateway, certificate authentication is configured. I can logging in using secoclient but when i try with browser below error found.
====== What kind of certificate authentication method do you configure? Certificate-anonymous authentication or certificate-challenge authentication? And have you uploaded the valid CA certificate into the firewall already, the valid client certificate into the remote login terminals?