Running a cPanel reseller hosting business comes with its share of challenges. From account creation issues to performance problems, resellers encounter various problems that can impact their business. This troubleshooting guide covers the most common cPanel reseller issues and provides practical fixes to keep your hosting business running smoothly.
Common cPanel reseller issues
1. Account creation failures
Problem: Unable to create new accounts in WHM
Causes:
- Resource limits exceeded
- Package configuration errors
- DNS zone creation failures
- Disk space full
- Permission issues
Solutions:
- Check available disk space:
df -h - Verify package limits in WHM → Packages
- Check DNS zone configuration
- Review WHM error logs:
/usr/local/cpanel/logs/error_log - Verify reseller account permissions
2. Email delivery issues
Problem: Clients report emails not being delivered
Causes:
- SPF/DKIM misconfiguration
- Blacklisted IP addresses
- Port 25 blocked
- Mail server configuration errors
Solutions:
- Configure SPF records:
v=spf1 ip4:YOUR_IP ~all - Set up DKIM authentication
- Check IP blacklist status: mxtoolbox.com
- Verify port 25 is open
- Test email delivery: mail-tester.com
3. SSL certificate problems
Problem: SSL certificates not installing or renewing
Causes:
- DNS not pointing to server
- Port 80 blocked
- Let's Encrypt rate limits
- Domain validation failures
Solutions:
- Verify DNS A records point to server IP
- Ensure port 80 is accessible
- Wait for rate limit reset (if exceeded)
- Use AutoSSL in cPanel for automatic SSL
- Manually install certificates if needed
4. Performance degradation
Problem: Slow server performance affecting clients
Causes:
- Resource abuse by accounts
- Overselling resources
- Database optimization needed
- High CPU usage
- Memory exhaustion
Solutions:
- Monitor resource usage: WHM → Server Status
- Identify resource-heavy accounts
- Optimize MySQL databases
- Enable CloudLinux for resource limits
- Upgrade server resources if needed
5. Backup failures
Problem: Automated backups not completing
Causes:
- Insufficient disk space
- Backup destination unreachable
- Permission errors
- Timeout issues
Solutions:
- Check available disk space
- Verify backup destination connectivity
- Check backup script permissions
- Increase backup timeout limits
- Use JetBackup for reliable backups
6. WHMCS integration issues
Problem: WHMCS not provisioning accounts automatically
Causes:
- WHM API credentials incorrect
- Firewall blocking API access
- WHMCS module misconfiguration
- SSL certificate issues
Solutions:
- Verify WHM API credentials in WHMCS
- Test API connection: WHMCS → Utilities → Server Status
- Check firewall rules for port 2087
- Update WHMCS cPanel module
- Use SSL for API connections
7. DNS propagation delays
Problem: DNS changes taking too long to propagate
Causes:
- TTL values too high
- DNS cache issues
- Nameserver misconfiguration
Solutions:
- Lower TTL values before changes (300 seconds)
- Flush DNS cache:
ipconfig /flushdns(Windows) - Verify nameserver configuration
- Use DNS propagation checker tools
8. Account suspension problems
Problem: Accounts not suspending/unsuspending properly
Causes:
- WHM suspension script errors
- File permission issues
- Account state conflicts
Solutions:
- Check WHM suspension logs
- Verify account file permissions
- Manually suspend via command line if needed
- Review account status in WHM
Prevention best practices
1. Regular monitoring
- Set up server monitoring alerts
- Monitor disk space daily
- Track resource usage trends
- Review error logs weekly
2. Proactive maintenance
- Keep cPanel and WHM updated
- Regular database optimization
- Clean up old backups
- Monitor account usage
3. Documentation
- Document common fixes
- Create troubleshooting guides
- Maintain change logs
- Keep support ticket records
Getting help
When issues persist:
- Check cPanel documentation
- Search cPanel forums
- Contact your hosting provider support
- Review cPanel error logs
- Use cPanel support (if licensed)
iServerGo cPanel reseller support
iServerGo provides comprehensive support for cPanel reseller hosting:
- 24/7 technical support
- Expert cPanel assistance
- Proactive monitoring
- Regular server maintenance
- Multiple data centers (hong kong hosting, us web hosting, eu web hosting)
Contact iServerGo support for help resolving cPanel reseller hosting issues quickly and efficiently.
Alex, Senior SRE is a hosting infrastructure specialist with years of experience managing mission-critical workloads. This article reflects real-world expertise in Troubleshooting and is regularly updated to ensure accuracy.
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