https://github.com/tlslink/sslcon
Go implementation of the OpenConnect VPN Protocol for client side development. Engine for AnyLink Secure Client.
https://github.com/tlslink/sslcon
anyconnect anylink ocserv openconnect sslvpn vpn
Last synced: about 1 month ago
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Go implementation of the OpenConnect VPN Protocol for client side development. Engine for AnyLink Secure Client.
- Host: GitHub
- URL: https://github.com/tlslink/sslcon
- Owner: tlslink
- License: mit
- Created: 2022-03-23T09:13:24.000Z (about 4 years ago)
- Default Branch: main
- Last Pushed: 2025-11-30T09:00:52.000Z (6 months ago)
- Last Synced: 2025-12-02T13:30:30.271Z (6 months ago)
- Topics: anyconnect, anylink, ocserv, openconnect, sslvpn, vpn
- Language: Go
- Homepage:
- Size: 444 KB
- Stars: 64
- Watchers: 2
- Forks: 29
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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## sslcon
This is a Golang implementation of the [OpenConnect VPN Protocol](https://datatracker.ietf.org/doc/html/draft-mavrogiannopoulos-openconnect-04) for client side development.
The released binaries contain a command line program(sslcon) and a VPN service agent(vpnagent), the latter of which should be run as a separate background service with root privileges, so that the front-end UI does not require an administrator authorization every time it starts.
The API is exposed through the WebSocket and JSON-RPC 2.0 protocols, so developers can easily customize a graphical interface that meets their needs.
**[There](https://github.com/tlslink/anylink-client) is a GUI client example showing how to use this project.**
Currently the following servers are supported,
- [AnyLink](https://github.com/bjdgyc/anylink)
- [OpenConnect VPN server](https://gitlab.com/openconnect/ocserv)
## CLI
```
$ ./sslcon
A CLI application that supports the OpenConnect SSL VPN protocol.
For more information, please visit https://github.com/tlslink/sslcon
Usage:
sslcon [flags]
sslcon [command]
Available Commands:
connect Connect to the VPN server
disconnect Disconnect from the VPN server
status Get VPN connection information
Flags:
-h, --help help for sslcon
Use "sslcon [command] --help" for more information about a command.
```
### install
```shell
sudo ./vpnagent install
# uninstall
sudo ./vpnagent uninstall
```
the installed service on systemd linux
```
sudo systemctl stop/start/restart sslcon.service
sudo systemctl disable/enable sslcon.service
```
the installed service on OpenWrt
```
/etc/init.d/sslcon stop/start/restart/status
```
### connect
```bash
./sslcon connect -s test.com -u vpn -g default -k key
```
### disconnect
```
./sslcon disconnect
```
### status
```
./sslcon status
```
## APIs
You can use any WebSocket tool to test the API.
ws://127.0.0.1:6210/rpc
### status
```json
{
"jsonrpc": "2.0",
"method": "status",
"id": 0
}
```
### config
```json
{
"jsonrpc": "2.0",
"method": "config",
"params": {
"log_level": "Debug",
"log_path": ""
},
"id": 1
}
```
### connect
```json
{
"jsonrpc": "2.0",
"method": "connect",
"params": {
"host": "vpn.test.com",
"username": "vpn",
"password": "123456",
"group": "",
"secret": ""
},
"id": 2
}
```
### disconnect
```json
{
"jsonrpc": "2.0",
"method": "disconnect",
"id": 3
}
```
### reconnect
```json
{
"jsonrpc": "2.0",
"method": "reconnect",
"id": 4
}
```
### stat
```json
{
"jsonrpc": "2.0",
"method": "stat",
"id": 7
}
```