Support for SSL VPN on the USG

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Support of USG series firewalls for the SSL VPN function
1. The USG2100, USG2200, and USG5100 BSR do not support the SSL VPN function.
2. In USG2000 or USG5000 V300R001, the SSL VPN function can be configured in CLI mode instead of web UI mode in V300R001C00SPCa00 and V300R001C00SPCb00. The SSL VPN function can be configured in web UI or CLI mode in other versions of V300R001.
3. The USG6000 series firewalls support the SSL VPN function.

Other related questions:
Working principle of SSL VPN on the USG
Working principle of Secure Sockets Layer (SSL) VPN on the USG 1. Concept SSL is a security protocol that provides security connections for application layer protocols that are based on TCP. The SSL protocol is widely applied in fields such as e-commerce and e-banking to ensure security for data transmitted over the network. SSL can implement connection privacy, identity authentication, and connection reliability. 2. SSL The SSL protocol is composed of two layers. a. Lower-layer protocol SSL record protocol The SSL record protocol divides upper-layer data into records, compresses and calculates the records, appends message authentication codes (MACs) to the records, encrypts the records, and then transmits the records to the peer party. b. Upper-layer protocols (1) SSL handshake protocol: The client and server establish a session through the handshake protocol. The session contains a group of parameters, including the session ID, certificate of the peer party, encryption algorithm list (including the key exchange algorithm, data encryption algorithm, and MAC algorithm), compression algorithm, and primary key. The SSL session can be shared by multiple connections to reduce the session negotiation overhead. (2) SSL change cipher spec protocol: The client and server notify the recipient through the SSL change cipher spec protocol that subsequent packets are protected and transmitted based on the newly negotiated encryption algorithm list and key. (3) SSL alert protocol: used by a party to report alarm information to the other party. The message carries the alarm severity and description. 3. SSL VPN provides four types of services: a. Web proxy The web proxy allows users to access web servers on the internal network through the USG and provides HTTP-based web services for users. b. Network extension After a user installs the network extension client of the USG on the local PC, a virtual NIC is generated. The user can then conduct SSL data communication with the intranet through this virtual NIC. c. Port forwarding As a non-web application mode, port forwarding provides security access for TCP-based applications. In port forwarding, user access is controlled at the application level. d. File sharing File sharing involves providing shared resources in Windows systems that support different server protocols such as the System Management Board (SMB) protocol, or Linux systems that support the Network File System (NFS) protocol as web pages to users.

SSL VPN virtual gateway on the USG
Configure SSL parameters. Configure the SSL version supported by the USG, encryption suite, session timeout duration, and life cycle. You can retain the default values. Procedure: system-view v-gateway v-gateway-name //Access the virtual gateway view. basic, //Access the basic virtual gateway view. ssl version { sslv30+tlsv10 | tlsv10 } //Configure the SSL version supported by the USG. By default, the USG supports SSL3.9 and TLS1.0. ssl ciphersuit { allciphersuit | custom { aes256-sha | non-aes256-sha } { des-cbc3-sha | non-des-cbc3-sha } { rc4-sha | non-rc4-sha } { rc4-md5 | non-rc4-md5 } { aes128-sha | non-aes128-sha } { des-cbc-sha | non-des-cbc-sha } } //Configure the SSL encryption suite. ssl timeout time //Configure the SSL session timeout duration. ssl lifecycle { time | no-time-limit } //Configure the SSL life cycle. ssl session-reuse enable //Enable the SSL session reuse function. Follow-up processing display ssl //View SSL configuration.

Configuring SSL VPN parameters for the USG
Configure SSL parameters. Configure the SSL version supported by the USG, encryption suite, session timeout duration, and life cycle. You can retain the default values. Procedure: system-view v-gateway v-gateway-name //Access the virtual gateway view. basic, //Access the basic virtual gateway view. ssl version { sslv30+tlsv10 | tlsv10 } //Configure the SSL version supported by the USG. By default, the USG supports SSL3.9 and TLS1.0. ssl ciphersuit { allciphersuit | custom { aes256-sha | non-aes256-sha } { des-cbc3-sha | non-des-cbc3-sha } { rc4-sha | non-rc4-sha } { rc4-md5 | non-rc4-md5 } { aes128-sha | non-aes128-sha } { des-cbc-sha | non-des-cbc-sha } } //Configure the SSL encryption suite. ssl timeout time //Configure the SSL session timeout duration. ssl lifecycle { time | no-time-limit } //Configure the SSL life cycle. ssl session-reuse enable //Enable the SSL session reuse function. Follow-up processing display ssl //View SSL configuration.

Is the USG firewall support L2TP and SSL VPN at the same time ?
Support.

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