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Postfix SMTP Server Upwork freelancers typically receive a client rating of 4.80.

Last updated: October 1, 2015

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Alexander M.

Alexander M.

Software Developer C++/Qt

Ukraine - Tests: 2 - Portfolio: 5

Software Engineer with 10+ years of diverse experience in software development, systems administration, and database administration. Developer of the opensource report solution CuteReport:

$45.00 /hr
1,307 hours

Offshoreit Support

Offshoreit Support Agency Contractor

CEO and Founder

India - Tests: 3 - Portfolio: 1

Offshore IT Support is a leading Technical Support Company that provides Outsourced 24/7 Technical Support, Remote Server Administration, Server Security, Linux/Windows Server Management, Server Audit and Helpdesk Management to Datacenters, Hosting companies and ISPs around the globe. With over 5 years experience in working with major hosting providers and data centers, Offshore IT Support is the first company of its kind who provides “Expert Call Back” feature to the customers. I have well rounded knowledge and hands-on experience in the following areas: Windows Servers Win 2003, Win 2008, MSSQL Server, IIS , Azure, Apache, IIS, Amazon Web Services, Dedicated Server, VPS. WHMCS. Linux configuration, maintenance & troubleshooting for RHEL, Centos, Debian, Ubuntu Virtualization: Vmware, Openvz, Virtuozzo, Xen, KVM, vserver, Cloud hosting: Amazon EC2, AWS, S3, Cloud Computing, Digital Ocean, VPS, Networking (dhcp, DNS:powerdns/bind/named, vpn: openvpn/pptp, firewalls: iptables, proxies), Web servers (apache, nginx, lighttpd, tomcat), Mail servers (exim, postfix, qmail, antispam/ antivirus: clamav/spamassassin, courier, dovecot), Hosting panels as Cpanel/WHM, Plesk, Directadmin, WebsitePanel.Webmin, DirectAdmin, Virtualmin & Vestacp SSL Certificates : Symantec, Digital certs, Go daddy. Verisign Thwart etc... Networking: Active Directory,Group Policy, DNS, DHCP, FTP, VPN, NFS, RAID, DHCP, DNS, DFS, VPN, WDS, RRAS, TS server, NAP, Proxy server, Windows Failover clustering,Network Load Balancing (NLB), Remote Desktop Services. Storage: Configure NAS and SAN, Openfiler NAS/SAN, Starwind SAN. Backup: R1 Soft, Windows NT Backup, Shadow Protect, Configure and troubleshoot the backup issues. CCNA: IP addressing sub-netting, IP Routing Routing Protocol, EIGRP, OSPF, ACL, Frame Relay connection, NAT/PAT, Virtual LAN, WirelessLAN.

Associated with: Offshore IT Support

$11.00 /hr
11 hours

Bogdan daniel S.

Bogdan daniel S.

VCP, MCSA, Exchange, Vmware, HyperV, Servers Expert Admin

Romania - Tests: 8 - Portfolio: 1

10+ years experience in Information Technology (IT) Major areas of expertise: VMware and Microsoft virtualization technologies. Designing and implementing fault-tolerant virtualization clusters SAN and NAS systems (iSCSI, FC) Windows 2003 / 2008 / 2012 Server * Active Directory * Microsoft ISA Server and TMG * Clustering * MS Windows XP/Vista/7/8 desktop/workstation operating systems * Centralized anitivirus systems WSUS * TCP/IP, Switching and Routing * Firewalls IBM, HP, Dell Servers * DNS, DHCP, Wins * Print Server * File Server * Network and Servers documentation * LAN hardware/software administration, design, installation and configuration * Print Server * LAMP Administration * Linux services : squid, postfix, dovecot, firewall, ldap, mysql, nagios, dhcp, bind etc Certifications: MCP - Microsoft Certified Professional MCSA - Microsoft Certified Systems Administrator VCP - Vmware Certified Professional VCP-510 * VCA-DCV - Vmware Certified Associate Data Center Virtualization.

Groups: Microsoft Certified Professionals

100% Job Success
$22.22 /hr
2,670 hours

Alexandru V.

Alexandru V.

Senior Linux Administrator

Romania - Tests: 4 - Portfolio: 2

* Fully manage the installation, configuration and troubleshooting of Linux servers * Install and configure Web Servers and MySQL * Install and configure customer scripts and programs * Monitor performance to identify and resolve issues using a suite of systems and tools. * Troubleshoot and resolve network, system, hardware and software problems. * Achieve quick fixes and / or long-term solutions as needed. * Maintain 100% customer satisfaction through all available means.

100% Job Success
$20.00 /hr
126 hours

Sergo Sarkisian

Sergo Sarkisian

Linux , Cisco ,Vmware , Voip, firewall , security specialist

Georgia - Tests: 18

I want to utilize my knowledge, skills and professional experience in order to contribute to the growth of the company I am working for whilst improving myself. SKILLS:network engineer ,system administrator(RedHat,CentOS,FreeBSD,OpenBSD,WIndows 2000,2003 server), cisco certified specialist(CCNA) Configuration of CISCO routers and switches,firewalls,servers:cisco 36xx,65xx, series,ASA firewall 55xx series, Implementation , configuration,design ,troubleshooting of basic routing protocols(BGP,EIGRP,RIP,OSPF,QoS,MPLS,HSRP,VRRP,GLBP) , Security: IPsec and many vpn solutions,certificate setup 1 Web servers - Apache 2.x,nginx,Squid proxy 2 Mail servers -Postfix,qmail ,sendmail,Mdaemon 3 FTP servers -WuFTPD,Vftpd 4 DNS –bind version 9 ,VPN (Openvpn, IPSEC implementation ) 5 DATABASES-Sql,mysql,postgresql,sqlite 6 LVM ,RAID(0,1,5,10) configuration 7 Experinece in network monitoring tools:Nagios,MRTG ,Cacti

Groups: Bluehost Developers and Designers

100% Job Success
$20.00 /hr
921 hours

Antonio jose S.

Antonio jose S.

Senior IT Consultant

Spain - Tests: 3

- Expert in information security management systems: Implementation of an information-security management system according to Norm UNE ISOIEC 27001, definition of security objectives, indicators, political security, code of best practice, risk management, treatment plan, control access definition, communications and operations, legal compliance, management policies incidents of security, CPD preparation, elaboration of contingency plans, business continuity plans, plans elaboration testing of the continuity plan, design of the applicability statement, product realization, actions preventive corrective action, internal audits, training delivery. - Expert in management of the information technology services systems: Introduction of a management system of information technologies services according to standard ISO 20000, elaboration of service processes delivery (capacity, continuity and availability, service levels, reports of service, security, TI budget), control process (configuration, change), delivery processes, solving incidents (problems) processes, business relationships process (suppliers) relations, internal audits, training. -Software process improvement: Implementation of ISO 15504/12207 (SPICE), internal audits, training. -Technological expert: design and implementation of networks architecture, information systems, backup policies, business continuity plans, servers administration (Linux, Unix, Windows, Mac Os), databases (Oracle, MySQL, Posgree), SharePoint, web servers (Apache, IIS), servers (Tomcat, JBoss, WebSphere) applications, ethical hacking (nmap, telnet, Shell script, ssh), vulnerabilities analysis and treatment (Nikto, Nessus, Acunetix, Grendel Scan).

100% Job Success
$33.33 /hr
269 hours

Glen Millard

Glen Millard

Sr. SQA Engineer/Systems Admin/Linux/UNIX/Apache/Tomcat/PHP/MySQL/shel

United States - Tests: 6

For the last 10 years, I have been working in the software testing field. I have developed my own test harnesses using a combination of Perl , shell and some tcl/tk scripts. My core competency lies in automation and deployment , mostly in a Linux/UNIX environment. I can also do system/network administration if need be. I have a good foundation of ecommerce deployments (oSCommerce). I have experience in automated software testing and some debugging skills. I have experience in basic firewall configurations (iptables), as well as aspects of security (ip tunneling, ssh, ssl) I can manage Cisco Routers/Firewalls at a basic/intermediate level too. I am quite experienced with various PBX software packages (Asterisk and their flavours) as well as VoIP technologies. I am quite savvy with video/audio streaming (ogg, gstreamer, etc) I am seeking opportunities to assist folks/companies to maintian, build and develop test plans, test cases and automated builds/tests for thier software. I am more efficient in a Linux/UNIX environment.

$30.00 /hr
931 hours

Priyaranjan Sahu

Priyaranjan Sahu

Expert in Linux and Windows server administration.

India - Tests: 6 - Portfolio: 19

--> DNS management (Registrar end and Hosting end), --> Mail Services (Postfix, Qmail, Exim, Mail enable, Exchange), --> FTP Services (Proftpd, PureFTP,VSFTP), --> Plesk Panel (Windows and Linux), --> Cpanel (Linux) and Enkompass (Windows), --> Virtuoozzo (VPS, Linux and Windows), --> Webmail (Roundcube, Horde, Squirrel, Atmail), --> Database (MySQL, MSSQL, Jet) --> Statistics analysers (Awstats, Webalizer and etc) --> SPAM checkers (Spamassasin, Boxtrapper) --> Network Administration (CCNA, Linux and Windows) --> Webservers (Apache, Nginx, IIS) --> CMS (Wordpress, Joomla, Magento, PHPFox, Wiki, Forums, Drupal) --> Technical SEO with speed optimisation from server end. --> Scripts installation (PHP, Perl, Shell) --> Server Hardening. --> Installation of Softwares on a server environment. --> Migration and setup of websites with minimum downtime. --> Technical article writing. --> Active Directory. --> Lync Server. ---> Parallels Operations Automation. --> Parallels Business Automation. I am glad to provide Technical help related with Servers both Linux and Windows as well as technical help related with wordpress, Joomla, Magento, Drupal and SEO optimizations. I have worked with Parallels Products like Virtuoozzo, Plesk and also worked with Cpanel from the past 3 years totally dedicated. I am an expert in Web-hosting industry. I am also an expert in Network administration. Please check my Blog for some solutions:

84% Job Success
$22.22 /hr
21 hours

Roberto Murillo

Roberto Murillo

Computers and Servers Technical Support

Honduras - Tests: 3

1. I have knowledge working with graphics environment Linux Systems and terminals with different Linux distributions (CentOS, Fedora, Ubuntu, Debian, Kubuntu). 2. I know how to configure GNU / Linux Web Administration's interface (Webmin). 3. I have knowledge working with Windows Operating System (Installation, Update & Configuration, etc.). 4. I can give Hardware Technical Support with Personal Computers or Servers (changes Motherboards, Processors, Graphics Cards, Memory RAM, etc.). 5. I can work with installation, configuration and upgrade BIOS. 6. I have Web Programming Knowledge with HTML/XHTML, CSS, and PHP. 7. In working with Linux systems, I can install, upgrade and configure different services to Servers GNU / Linux, such as Samba, Postfix SMTP, Dovecot IMAP/POP3, DHCP Server, Apache HTTP, Shorewall Firewall, SSH, Telnet, and more.

80% Job Success
$7.78 /hr
147 hours