Operating Systems - Ubuntu Server/Desktop, CentOS, RedHat, Kali, Windows Server 2003/2008/2008 R2/2012/2012 R2/2016 (Active Directory, DNS, DHCP, DFSR), Windows XP, Vista, 7, 8, 10, etc. Server Hardware/Equipment - HP Proliant DL380-G9/DL380-G10/DL360-G9, BL460c G6, HP storage P2000 Telecommunication & Networking - DNS, DHCP, FTP, HTTP, HTTPS, LDAP, NTP, RDP, SSH, Telnet, SOCKS, SMB, TCP, UDP, ICMP, IPv4, IPv6, STP, PVST, RSTP, MSTP, VLAN, Port security, PPTP, RIPv2, RIPng,OSPFv2, OSPFv3, IS-IS, EIGRP, BGP, MP-BGP, ACL Operating System Virtualization - VMware Workstation/ESXi/vSphere/vCenter, Windows Server Hyper-V Storage Virtualization - SAN, iSCSI Initiators & Targets, FC, FCoE, RAID-1/0/10/5/50/6/60) Information Security - IPS/HIPS, IDS, Firewalls,VPN (PPTP-VPN, IPsec, GRE, OpenVPN), Cryptography, Application Monitoring, Password Management, URL Blocking, Antivirus Web servers - Apache (Windows, Linux Httpd), Load Balancer, HAproxy, Nginx (Linux) Proxy servers - Kerio Control, Squid, Fortinet Mail servers – Microsoft Exchange, Iredmail, Kerio connect, Zimbra Switches – Cisco Catalyst 3850/3650/2960-L/2950, Mikrotik CSS326-24G-2S+, HP ProCurve 2510-48, Zyxel MES-35 Series, Huawei, Juniper Routers/Firewalls – Cisco Router 7600 Series, Cisco ASA 5505/5520, Mikrotik CCR1036-12-4S, Kerio Control, IPfire, Pfsense Veeam Backup, Ansible, Jenkins, Oracle Database-primary and standby replication