![]() ![]() Port forwarding allows for port-level secure access to intranet resources. Port forwarding applies to TCP application services, such as Telnet, remote desktop, FTP, and email. Used by remote services to access intranet TCP resources. The operations include creating and browsing a directory and downloading, uploading, renaming, and deleting a file. Users can web browsers to perform some operations on an intranet file system as easily as they do on a local file system. Used by remote users to access an intranet file server running the Server Message Block (SMB)-capable Windows OS and those running the Network File System (NFS)-capable Linux OS. Used by remote users to access intranet web resources. Supports cache clearing policies to clear the access history that remote users left during access to intranet resources, hardening user information security.Supports host check policies to check whether the operation systems, ports, processes, and antivirus software of remote user devices meet security requirements, and provides the anti-nested remote desktop connections and anti-snapshot functions to eliminate security risks from remote user devices.Provides multiple identity authentication modes, such as local authentication, server authentication, certificate-anonymous authentication, and certificate-challenge authentication. ![]() Allows the administrator to set fine-grained control over the permissions of remote users based on accessed resource types.Adopts the B/S architecture design so that remote user devices can use web browsers to securely and efficiently access intranet resources without any additional client software.SSL VPN has advantages over these early VPN technologies in remote access scenarios and has the following features: The network administrator cannot implement fine-grained control over the permissions of remote users on intranet resources.The IPSec/L2TP VPN configuration is complex.Specific client software needs to be installed on remote user devices, complicating network deployment and maintenance.However, these VPN technologies have the following disadvantages: Before the emergence of SSL VPN, early VPN technologies, such as IPSec and L2TP can be used for remote access. ![]()
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