Overplus Getting Started: Set Up Your Own Proxy in 5 Minutes

What is Overplus

Overplus is a lightweight, high-performance proxy server written in C++17, supporting SOCKS5, HTTPS, and Trojan protocols.

Highlights:

• Blazing fast: 146 concurrent connections use only 25MB memory, CPU < 1%
• Zero dependencies: Statically compiled, no runtime libraries needed
• Windows GUI client: Works out of the box, one-click connect
• One-click install: Single command to set up the server

Prerequisites

You need:

1. A VPS outside your region (Ubuntu/Debian recommended, 2 cores / 2GB RAM is enough)
2. A domain name (optional, for certificate issuance)
3. SSH access to your VPS

Step 1: Server Installation

Option A: One-Click Install (Recommended)

SSH into your VPS and run:

curl -O https://raw.githubusercontent.com/xyanrch1024/overplus/master/install.sh && chmod +x install.sh && sudo ./install.sh

The script will guide you through:

1. Set a password: Your proxy connection password
2. Choose a port: Default is 443 (recommended — disguises traffic as normal HTTPS)

After installation, the script automatically:

• Generates a TLS certificate (valid for 10 years)
• Downloads the Overplus binary
• Configures and starts a systemd service

Verify the service is running:

systemctl status overplus

If you see active (running), you’re all set.

Option B: Manual Install

If you prefer manual setup:

# 1. Download
wget https://github.com/xyanrch1024/overplus/releases/latest/download/overplus-linux-x86_64.zip
unzip overplus-linux-x86_64.zip -d /tmp/overplus

# 2. Install binary
cp /tmp/overplus/overplus /usr/bin/overplus
chmod +x /usr/bin/overplus

# 3. Generate TLS certificate (self-signed example)
mkdir -p /etc/overplus
openssl req -x509 -nodes -newkey ec:<(openssl ecparam -name prime256v1) \
  -keyout /etc/overplus/server.key \
  -out /etc/overplus/server.crt \
  -subj "/CN=your_server_ip" -days 3650

# 4. Create config file
cat > /etc/overplus/server.json << 'EOF'
{
    "run_type": "server",
    "local_addr": "0.0.0.0",
    "local_port": "443",
    "allowed_passwords": ["your_password_here"],
    "log_level": "NOTICE",
    "log_dir": "",
    "ssl": {
        "cert": "/etc/overplus/server.crt",
        "key": "/etc/overplus/server.key"
    },
    "websocketEnabled": false,
    "dns_cache_ttl": 600,
    "dns_cleanup_interval": 600
}
EOF

# 5. Create systemd service
cat > /etc/systemd/system/overplus.service << 'EOF'
[Unit]
Description=overplus proxy
After=network.target

[Service]
User=root
ExecStart=/usr/bin/overplus -c /etc/overplus/server.json
Restart=on-failure
RestartSec=10s
LimitNOFILE=infinity

[Install]
WantedBy=multi-user.target
EOF

# 6. Start service
systemctl daemon-reload
systemctl start overplus
systemctl enable overplus

Enable BBR (Highly Recommended)

BBR significantly improves TCP throughput:

echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf
echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf
sysctl -p

Verify it’s active:

sysctl net.ipv4.tcp_congestion_control
# Output: net.ipv4.tcp_congestion_control = bbr

Step 2: Windows Client

Download

Go to the Release page and download overplus-client-windows-x64.zip. Extract to any directory.

Setup

After extraction, you’ll see:

overplus_client.exe    # Main program
Qt5Core.dll           # Qt runtime
Qt5Gui.dll
Qt5Widgets.dll
libcrypto-3-x64.dll   # OpenSSL
libssl-3-x64.dll
plugins/              # Qt plugins

Double-click overplus_client.exe to launch the GUI client:

1. Enter your VPS IP address in the Host Name field
2. Enter the port (default 443)
3. Enter your password
4. Click SAVE to store settings
5. Click CONNECT to connect

When the status bar shows CONNECTED and the tray icon turns green, you’re connected.

System Proxy

Once connected, Overplus automatically sets the Windows system SOCKS proxy. It restores the original settings when you close the program. You can also configure manually:

• Open Windows Settings → Network & Internet → Proxy
• Manual proxy setup: 127.0.0.1, port 1080

Alternative Clients

Overplus is compatible with the Trojan protocol. You can use any Trojan-compatible client:

Example configuration (Clash):

proxies:
  - name: "Overplus"
    type: trojan
    server: your_server_ip
    port: 443
    password: your_password
    sni: your_server_ip
    skip-cert-verify: true

Step 3: Verify

Check Server Logs

# View Overplus logs
journalctl -u overplus -f

# Or check log files directly
cat /var/log/overplus.*.log

Normal connection output looks like:

accept incoming connection :1.2.3.4
connected to example.com:443
session destroyed

Test Your Connection

Visit https://ipinfo.io to confirm your IP has changed to your VPS IP.

Troubleshooting

Can’t Connect?

1. Check firewall: Make sure port 443 is open on your VPS

   # Ubuntu/Debian
   ufw allow 443/tcp
   # Or disable firewall
   ufw disable
   

2. Check service status:

   systemctl status overplus
   journalctl -u overplus -n 20
   

3. Check port conflict: Port 443 must not be used by other services (nginx, apache, etc.)

Slow Speed?

1. Make sure BBR is enabled
2. Try a different VPS datacenter/region
3. Check your VPS bandwidth and traffic quota

How to Change Password?

Edit the server config:

nano /etc/overplus/server.json
# Modify the allowed_passwords field
systemctl restart overplus

Benchmarks

Tested on 2-core Xeon Skylake / 2GB RAM / Ubuntu 24.04:

Links

• GitHub: https://github.com/xyanrch1024/overplus
• Releases: https://github.com/xyanrch1024/overplus/releases
• Telegram: https://t.me/+JfKOqh2wH25kMWFl