Linux Debian
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System administration · Software and server configuration
Odessa, Ukraine
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System administration · Software and server configuration
Sumy, Ukraine
Professional system administration. Linux/Unix.
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My Skills and Experience I specialize in and work with various operating systems: Debian Ubuntu RHEL CentOS FreeBSD Windows I work with server hardware: IBM HP ProLiant Dell PowerEdge Supermicro I know how the following software should work: Web: Apache, Nginx, Lighttpd, OpenLiteSpeed Mail: Exim, Postfix, Dovecot FTP: ProFTPd, vsftpd, PureFTPd DNS: BIND, PowerDNS DHCP Gateway: NAT, traffic shaping Proxy: Squid Directory: LDAP AAA: FreeRADIUS VPN: IPsec-based, OpenVPN, PPTP, L2TP TFTP NTP Syslog TLS/SSL SNMP Virtualization: KVM, Xen, VMware ESX, OpenVZ, Proxmox Backup and Restore: RSYNC Revision Control Systems: CVS, SVN, Git File Sharing: NFS, SMB Software-Defined/Network-Based Storages: DRBD, Ceph, iSCSI, AoE Printing Systems: CUPS I am familiar with databases: PostgreSQL MySQL I have experience with monitoring systems: Zabbix Cacti Munin I also work with: Telephony: Asterisk (FreePBX, Elastix, MikoPBX) Routers: Mikrotik, All (Firmware OpenWRT, DD-WRT), hardware repair Billing systems for Internet Service Providers: Abills, Ubilling (building networks from scratch) Billing systems for hosting providers: BillManager, RootPanel, WHMCS Hosting panels: ISPManager, CPANEL, BrainyCP, VestaCP, ISPConfig, aaPanel, HestiaCP PON equipment (ONU, OLT): BDCOM Switches: Mikrotik, D-Link, TP-LINK, Cisco I have extensive experience in these areas. Feel free to reach out to me, I'll answer all your questions!
Please note: I do not engage in website development.
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I have been involved in the administration of systems and networks since 2014.
Thorough knowledge of the Windows family (AD DS, DNS, DHCP, FileServer, VPN, RDP, RDS, IIS)
I know Linux well. Debian/Ubuntu (web servers, VPN, proxy, database...)
Designing and deploying systems from "0" and working with existing solutions.
Finding and solving problems in the work of existing projects
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- Development, design, maintenance of the computer networks, computer equipment, network services, improvement and analysis of existing network, server, and service infrastructure;
- Users’ technical and software support;
- Setting up and maintaining Microsoft based operation systems WinXX, Windows Server 20XX;
- Setting up and maintaining Linux based operation systems Debian, Ubuntu, CentOS, and Unix-like FreeBSD;
- Administration of the: MTA(Dovecot, Postfix, Exim4, MS Exchange Server), FTP, SQL(MS SQL, MySQL, PostgreSQL, MongoDB), LAMP(Apache, Nginx, PHP), HAProxy, DNS, DHCP, NPS, DFS, NAS, VPN;
- VoIP servers;
- AD, LDAP, AAD;
- Extensive experience with DigitalOcean, Amazon AWS, GCP, Vultr, Azure, and other cloud service providers;
- Ubiquity, Mikrotik, Cisco, Dell, HP, Fortigate, SonicWall network equipment;
- Intrusion detection/prevention services (IPS, IDS, SNORT, Suricata) firewall (routing, VLAN, ACL, Proxy, NAT, DMZ), CARP, HA;
- HP, Supermicro, DELL, Fujitsu Siemens, IBM, Lenovo, EMC, NetApp equipment;
- Website administration (WordPress, Joomla, PHP, HTML, css etc.);
- Virtualization (Proxmox, Virtualbox, VMware, HyperV);
- etc