Hi, My name is Serhiy Kovalenko. I believe my strong points are my Perseverance and Punctuality. My #1 goal will always be to meet your needs and deadline. When working on a new project, I like to speak with the client, so that I can have a clear understanding of his/her needs and vision of the project. I'm honest and fair. Please take a look at my work history for comments from other clients. Thank you in advance for your time and consideration. I look forward to working with you soon. Listed below are my experience: - More than 15+ years of working experience in networking and server administration. I can help you with: - Server / Network Infrastructure Design, Deployment, Ongoing Administration / Maintenance, Migration, Optimization/Tuning - Emergency Support - Operating systems: Debian, Ubuntu, Red Hat, CentOS - Web & Application servers: Apache, Nginx, PHP-FPM - Databases: MySQL - Virtualization: KVM, VMWare, and Virtualbox - Main servers: DHCP, DNS, NTP, TFTP - Remote connection: OpenVPN, OpenSSH, VPN, PPTP, Accel-PPP, Radius - Remote Desktop: VNC, RDP, and NX - Billing System: ABillS - Monitoring: Munin, Monit, Cacti, Nagios - File Servers: Samba, NFS, FTP - Mail Servers: Dovecot, Exim, Postfix, Spamassassin, ClamAV, RoundCube, RBL, DKIM, SPF, PTR, DMARC - Firewalls & security: IPtables, Squid proxy server, Fail2ban - Programming languages: Shell scripting, Perl, PHP, SQL, Bash - Wordpress: Performance Tuning, Caching, Security, Malware removal - Hosting panels: ISPmanager, WHM, cPanel, and Vesta - SSL: cert installations, Commercial SSL + FREE SSL such as Let's Encrypt