Deploy VoIP Call Center on VPS

This article provides a guide demonstrating how to deploy VoIP call center on VPS.

This guide covers a complete ViciBox deployment on a Rad Web Hosting VPS for VICIdial call center operations, including VPS requirements, installation, networking, firewall configuration, SSL, and post-install verification.

Important: ViciBox is officially supported on bare metal, KVM virtualization, VMware, and dedicated servers. It should not be deployed on OpenVZ/LXC platforms because Asterisk timing and audio performance can be negatively affected. Rad Web Hosting KVM VPS plans are suitable for ViciBox deployments.

Recommended VPS Specifications

Testing / Lab Environment

Production (10-25 Agents)

ViciBox Express installations are typically suitable for small call centers and all-in-one deployments. Larger deployments should use clustered servers.

Order a Rad Web Hosting VPS

Recommended:

• KVM VPS
• SSD Storage
• Dedicated IPv4 Address
• Root SSH Access
• Reverse DNS (PTR) configured if outbound email is needed

Before proceeding, collect:

• Server IP
• Root password
• Hostname

Example:

Hostname: vicidial.example.com
IP: 192.0.2.10

See Also: How to Install Matomo on AlmaLinux VPS

How to Deploy VoIP Call Center on VPS

To deploy VoIP call center on VPS, follow the steps below:

1. Download ViciBox ISO

   Download the latest ViciBox release from:

   https://download.vicidial.com

   Current releases are based on OpenSUSE Leap and include:

   • VICIdial
   • Asterisk
   • MariaDB
   • Apache
   • PHP
   • Firewall Tools

2. Upload ISO to Rad Web Hosting VPS

   If using VPS management:

   1. Open VPS Control Panel
   2. Upload ISO
   3. Mount ISO to virtual CD/DVD
   4. Reboot VPS into ISO

3. Begin ViciBox Installation

   When the VPS boots:

   Select:

   Install ViciBox
   

   The installer will:

   • Partition the disk
   • Install OpenSUSE
   • Install ViciBox base system

   All data on the selected disk will be erased. (ViciBox)

   

4. Initial Configuration Wizard

   After reboot:

   Login:

   root
   

   The ViciBox configuration wizard launches automatically.

   Configure:

   Locale

   Example:

   English (US)
   

   Keyboard

   Example:

   US Keyboard
   

   License

   Accept License Agreement

   Timezone

   Example:

   America/Chicago
   

   Root Password

   Set a secure root password.

   The wizard may then offer system updates if internet access is available. Installing updates is recommended. (ViciBox)

5. Configure Static Networking

   VICIdial should always run on a static IP.

   Add nameservers to /etc/resolv.conf:

   echo "nameserver 8.8.8.8" >> /etc/resolv.conf && echo "nameserver 8.8.4.4" >> /etc/resolv.conf
   

   Launch YaST:

   yast
   

   Navigate:

   Network Settings
   

   Configure:

   IP Address
   Subnet Mask
   Gateway
   DNS
   

   Example:

   IP: 192.0.2.10
   Mask: 255.255.255.0
   Gateway: 192.0.2.1
   DNS1: 8.8.8.8
   DNS2: 1.1.1.1
   

   Apply changes.

   Verify:

   ping google.com
   

6. Update ViciBox

   Refresh repositories:

   zypper ref
   

   Update packages:

   zypper up -y
   

   Reboot:

   reboot
   

   Do not use:

   zypper dup
   

   The ViciBox developers specifically recommend normal updates.

7. Install VICIdial

   After login:

   Run:

   vicibox-install
   

   This launches the VICIdial installer.

8. Choose Installation Type

   For most VPS deployments choose:

   Express Box
   

   Express Box installs:

   • MariaDB
   • Apache
   • PHP
   • Asterisk
   • VICIdial

   onto a single server.

9. Configure Hostname

   Example:

   vicidial.example.com
   

   Verify:

   hostname -f
   

   Output:

   vicidial.example.com
   

10. Configure Database

    The installer automatically creates:

    asterisk
    vicidial
    mysql
    

    databases and users.

    Store generated credentials securely.

11. Configure Telephony

    Set:

    External IP

    Example:

    192.0.2.10
    

    Internal IP

    Example:

    192.0.2.10
    

    For single VPS deployments these are often identical.

12. Configure Firewall

    Open required ports.

    SIP

    5060 UDP
    5061 TCP
    

    RTP

    10000-20000 UDP
    

    Web

    80 TCP
    443 TCP
    

    SSH

    22 TCP
    

    VICIdial

    8089 TCP
    

    (if WebRTC is used)

13. Configure Rad Web Hosting Firewall

    Inside Rad Web Hosting firewall panel:

    Allow:

    See Also: Ultimate Guide to Configuring WHMCS Server Modules (with 3 Examples)

    22
    80
    443
    5060
    5061
    10000-20000
    8089
    

    TCP/UDP as appropriate.

14. Install SSL Certificate

    ViciBox includes SSL tools.

    Install Certbot:

    zypper install certbot
    

    Generate SSL:

    certbot certonly --standalone -d vicidial.example.com
    

    Certificates stored:

    /etc/letsencrypt/live/
    

15. Access VICIdial

    Open browser:

    http://SERVER-IP/vicidial/admin.php
    

    or

    https://vicidial.example.com/vicidial/admin.php
    

    Default credentials are generated during installation.

    Change passwords immediately.

16. Configure SIP Carrier

    Example SIP Trunk:

    Carrier Name
    Username
    Password
    SIP Server
    

    Navigate:

    Admin
    → Carriers
    

    Create carrier entry.

    Verify registration:

    asterisk -rvvv
    

    Then:

    sip show registry
    

    or

    pjsip show registrations
    

    depending on driver.

17. Verify Services

    Check Apache:

    systemctl status apache2
    

    Check MariaDB:

    systemctl status mariadb
    

    Check Asterisk:

    systemctl status asterisk
    

    Check VICIdial:

    systemctl status cron
    

18. Verify Asterisk

    Connect:

    asterisk -rvvv
    

    Useful commands:

    sip show peers
    sip show registry
    core show channels
    

19. Configure Backups

    Recommended daily backup:

    Database

    mysqldump --all-databases > /backup/mysql.sql
    

    Recordings

    /var/spool/asterisk/monitorDONE
    

    Configuration

    /etc/asterisk
    /etc/apache2
    

    Store backups on:

    • Remote FTP
    • S3 Storage
    • Rad Web Hosting Backup Service

20. Security Hardening

    Disable Password SSH

    Edit:

    /etc/ssh/sshd_config
    

    Set:

    PasswordAuthentication no
    PermitRootLogin prohibit-password
    

    Restart:

    systemctl restart sshd
    

    Install Fail2Ban

    zypper install fail2ban
    

    Enable:

    systemctl enable fail2ban
    systemctl start fail2ban
    

21. Common Troubleshooting

    Asterisk Not Starting

    Check:

    journalctl -xe
    

    and

    asterisk -cvvvvv
    

    No Audio

    Verify:

    UDP 10000-20000 Open
    

    Verify NAT settings.

    Phones Not Registering

    Check:

    sip show peers
    

    Confirm:

    5060 UDP Open
    

    Web Login Fails

    Check Apache:

    systemctl status apache2
    

    Review:

    tail -f /var/log/apache2/error_log
    

Final Verification Checklist

✅ Static IP Configured
✅ Hostname Configured
✅ ViciBox Installed
✅ VICIdial Installed
✅ Asterisk Running
✅ MariaDB Running
✅ Apache Running
✅ SIP Trunk Registered
✅ SSL Installed
✅ Firewall Configured
✅ Backups Enabled
✅ Security Hardened

Following these steps will provide a production-ready ViciBox/VICIdial deployment on a Rad Web Hosting KVM VPS suitable for inbound, outbound, predictive dialing, and call center operations.

Conclusion

You now know how to deploy VoIP call center on VPS.