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: Step-by-Step Guide for Installing and Configuring XRDP on Ubuntu VPS for Remote Desktop Connections

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: How to Install Microsoft SQL Server on Ubuntu VPS (10 Minute Quick-Start Guide)

    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.