Linux/Unix Servers, Cisco Routers/Switches, VoIP/Trixbox/Elastix/Asterisk*, PIX Firewall, OpenVPN, IPTables, WHM/CPanel, Lxadmin, Plesk, Ensim Pro, Postfix, Sendmail, Zimbra, Horde/RoundCube Webmail, Apache, DNS Management, Windows Advanced Server 2008/2012/2016/2019, MS Exchange Server, ISA / SQUID, Windows 10, MSOffice, OutLook, Wireless Router, Virtual Assistant, VMware Server/VMware Workstation, Virtual Box, OpenVZ/XEN, Dockers Management/Configurations. Resume: MS(Computer Networks), BS(CS), CCNA Certified.