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Typical total cost of Upwork Network Security projects based on completed and fixed-price jobs.

Upwork Network Security Jobs Completed Quarterly

On average, 107 Network Security projects are completed every quarter on Upwork.

107

Time to Complete Upwork Network Security Jobs

Time needed to complete a Network Security project on Upwork.

Average Network Security Freelancer Feedback Score

Network Security Upwork freelancers typically receive a client rating of 4.74.

4.74
Last updated: September 1, 2015
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  1. Vycheslav Novak

    Linux/Unix/Network Admin with bash, python scripting skills

    Ukraine - Tests: 3 - Portfolio: 1

    - Administration and solid knowledge and background of Unix/Linux systems ( CLI ): Ubuntu, CentOS, ArchLinux, Debian, Solaris, Red Hat: - sed/awk - LFS ( Linux from scratch ) - deep understanding of Linux Memory Management concept - hardware maintenance, troubleshooting (iostat, top, vmstat, iotop, strace ), configuration - regexp - iptables - PAM - grub loader - linux tools ( tcpdump, rsync, scp, tar, strace, semanage, chcon ) - Knowledge of Linux SELinux security system - Linux FTP setup for production use ( proftpd ) - NetApp SAN administration - Configuration Management Tools ( Puppet ) - Solaris experience ( Solaris 8/10 ) - Strong knowledge Client-Server architecture ( Apache Web Server with thin configuration ) - Experience in set up and administration of mail-server: exim + dovecot + postfix + RoundCubeMail - Experience in use and configure VPN-networks (OpenVPN) - Performance tuning Apache HTTPD ( prefork/workers for high-load systems ) - Building High-availability/Cluster Environment for Production Systems ( httpd + mod_jk + tomcat(ajp_connector ) + clustering ) - Apache Clustering Configuration ( Dynamic/Static Clustering with Session Sharing; Performance tuning ) - Solid understanding of LVM concept and file systems (ext3, ext4, NFS, NTFS, FAT32 ) - Solid understating RAID concept - Proficiency in the virtualization concept and technologies (XEN, KVM, Solaris zones ) - Multi-Factor Authentication system development ( OpenOTP, TOTP ) - Strong shell scripting ( bash, ksh, python ) - JIRA and Confluence, Redmine experience - Administration Windows Servers: 2003/2008/2012 R2, Windows NT ( XP, 7, 8 ), Active Directory - Deep knowledge of the units: Cryptography Computer networks (LAN, WAN, MPLS, PPPoE, PPTP) Knowledge of VPN technologies (OpenVPN, IPSec) Network protocols (IP, TCP, UDP, PPP, ARP, ICMP, RIP, OSPF, SMTP, POP3, VLAN, SSL, DHCP, NAT) OSI model Domain Name System (DNS) LDAP Clustering Load Balancing Strong understanding of network setup, layers, configuration and facilities (port forwarding, DMZ, virtual server) - Administration and configuration network hardware switches/routers D-Link (VLAN, LACP, ACL, VRRP), FortiNet (Fortigate 80c, 60c), Cisco Catalyst ( 3750-x, 2960s), HP A5210 SI, Checkpoint R75.20/Gaia/R77 - QoS ( MQC, DSCP, CoS, ToS ) - Knowledge of Cisco IOS - Building Nagios Monitoring System ( mrtg, pnp4nagios, SNMP monitoring ) - Experience with NAS, SAN or iSCSI storage systems - Experience in Datacenter migration - Experience in virtualization system VMWare ESX - Experience in Citrix Systems - Dell Hardware Servers ( PowerEdge R710, R520, R320, R720, EqualLogic PS6210XS, SAN N4032F ) - Juniper switches OS experience ( EX4200 ) - Strong performance management, problem identification, analytical and problem-solving skills - Develop Production services monitoring Dashboard on Ruby/JS/coffeescript - Python programming language - Basic experience in SQL language ( MySQL ) - Creating application with using Python, CGI, shell scripting - Optimization and improvement of processes - 24x7 Production Servers/Applications support and maintenance - Perform deployments to QA & PROD environments Successfully completed projects: DataCenter Migration Migrate all production servers and environment to new DC, including building/deployment from scratch in new DC. Completed in short time and with minimal downtime of business application. Building Physical Infrastructure for Production systems Planning, developing, devising infrastructure for Production systems. Including enterprise requirements: redundancy, high availability, clustering, risk mitigations. 3. MultiFactor Authentication for servers Developed, created, implemented system for secure two factor authentication for all users across all Linux servers based on WebADM OpenOTP library.

    $15.00 /hr
    0 hours
    0.00
  2. Robert C.

    Robert C.

    TIBCO Consultant & E-Commerce Architect

    United States - Tests: 2 - Portfolio: 2

    Good Day and thank you for taking a moment to read my profile! I started working in IT about four years ago as a technical support representative for Simple Helix, a Magento specialist web hosting company. From there, I had the opportunity to spend a year as a Network Analyst for a local, carrier class, ISP before moving on to a position as a Linux Systems Engineer with a Magento development firm. In the present, I work as an Applications Engineer with a focus on the TIBCO stack, most notably AMX, BusinessWorks, EMS, and SilverFabric. I have a very strong background in Linux/Unix administration and have worked extensively with CentOS, Red Hat, and Debian. I've worked with networks from a physical perspective, as a NOC Technican, as well as logical perspective troubleshooting complex application issues. Over the past few months I've taken the opportunity to learn to code in Java and I've recently attended Red Hat training for JBoss EAP 6. I'm a CPTE (Certified Penetration Testing Engineer) and would happily pursue projects as an E-Commerce Architect, Systems Engineer, TIBCO Engineer, JBoss Administrator, entry-level Programmer, or entry-level Ethical Hacker. I am available for new jobs immediately outside of US business hours.

    $33.33 /hr
    474 hours
    4.86
  3. Daniel J.

    Daniel J.

    Senior Systems Administrator

    United States - Tests: 4 - Portfolio: 1

    I am a Linux expert. I have been a linux user for 16 years and have used it professionally for 14 years. I was an early adopter of the Nginx web server and over the last 4 years I have been using it exclusively to manage high traffic web sites. I specialize in Linux security and have professional experience securing a web server using methods such-as but not limited to; chroot/jail environments, hardened kernel patches, and role-based access policies. I am an expert at tracking down even the most difficult of problems and most of my clients believe that I have a crystal ball under my desk. I am fluent in Python and PHP and can write everything from small scripts to automate tasks to a full blown command line application.

    $50.00 /hr
    32 hours
    5.00
  4. Daniel Guillermo Bareiro

    Daniel Guillermo Bareiro

    GNU/Linux and Unix system administrator

    Argentina - Tests: 2 - Portfolio: 2

    I manage and use free/open source software and GNU/Linux (most experienced Debian) since 2000. I have also participated in numerous conventions related to these themes (some of them as speaker) and collaborating with the discovery of bugs in applications for contribute with the community. Specialties: Networks and operating systems security, monitoring technologies. Advanced knowledge of GNU/Linux environments and virtualization platforms. LANs, WANs, VPNs, Firewalls, TCP/IP. Description of services: ---------------------------------- Servers: ====== Installations, configurations and maintenance plans for servers running GNU/Linux or free BSD operating systems range. * Planning, installation and configuration of GNU/Linux systems as both free and open source systems. * Installation, configuration and maintenance of servers of BSD range: FreeBSD and OpenBSD. * Print servers. * Mail servers with spam and virus filters. * Proxy servers. * Fax servers. * Corporate instant messaging servers. * Install and configure DNS servers. Procedures for domain management. * Management servers for uninterruptible power supplies. * Web servers (Apache, PHP, MySQL and PostgreSQL). * Database servers (MySQL and PostgreSQL). * DHCP servers. Networks and Infrastructure: ===================== Installation, maintenance and failure analysis of networks. High-availability systems, mass storage, remote backup, and monitoring equipment and services. * Installation and maintenance. * Firewalls. * VPNs. * DMZs. * RAID, SAN and NAS systems. * Implementation of VoIP telephony systems. * Virtualization systems (for production systems, development and testing). * Remote backup systems. * Monitoring systems. * Control, preventive analysis and resolution of faults in networks. * Installing and configuring high availability clusters. Consultancy: ========== My main goal is to provide a work environment based on trust, integrity and transparency, in order to become your strategic partner to help you realize your projects. My experience in the field of free/open source technologies allows me to offer a wide range of consulting services for your business, which include audit and analysis of systems, applications and networks, migration to free and open source systems, and systems integration, among others. * Migrating to free and open source systems. * Network analysis. * Security analysis. * Configuring applications. * Systems integration.

    $36.67 /hr
    55 hours
    4.92
  5. Muhammad Imran Afzal

    Muhammad Imran Afzal

    C/C++ Developer,Device Driver,Kernel modules and Bash scripting Expert

    Pakistan - Tests: 4 - Portfolio: 1

    I have 6 years of experience in Linux development and administration. Device Drivers, Kernel Porting, Kernel Modules, Development in networking protocols, gcc/g++ and Python are my expertise. I have strong knowledge in Linux internals including kernel specifics and system calls. I have work experience with mips64 based Cavium's OCTEON multicore netwrok processors. I have worked on network protocol offloading in this. I have the ability TO DO.

    $22.22 /hr
    13 hours
    5.00
  6. Roman T.

    Roman T. Agency Contractor

    UNIX and security expert, network and system administrator

    United States - Tests: 9 - Portfolio: 3

    I'm a problem solver with technical and managerial experience, based out of Los Angeles. I love solving complicated problems by building elegant solutions and seeing the impact it has on a business's growth. I've always been interested in the technological field, specifically in information security and automation, which has made a huge impact on my work experience. However, I recently found myself involved in start-ups and helping with management, risk assessment and developing business strategies. I offer the following key services: o Security Audit o Network and Systems Administrator Services o Information Security Services o IP-PBX and VoIP softswitchs: installation and maintenance o Software development: Web, desktop and server applications o Complex solutions for business-process automation Experience Platforms: Cisco (routers, switches and ASA), Huawei (L2&L3 routers and switches), MikroTik, Ubiquiti, OpenStack. OSs: UNIX (FreeBSD, OpenBSD, *BSD, Solaris), Linux (Debian, Ubuntu, Kali, Gentoo, Red Hat, SuSe, uLinux, ASP, Mandrake, Fedora Core), MikroTik's RouterOS, VRP (Huawei), Windows 95/98. Languages: C/C++, UNIX Shell Scripting (Bash, Shell, sed, awk), Delphi (Pascal), Perl, PHP, Python, SQL, T-SQL, Assembler (Intel and AT&T SysV/386 syntax), GTK+ applications, Erlang, HTML, CSS, JavaScript, JQuery, JSON, REST API, XML, XSLT, DTD. Databases Engines: PostgreSQL, MySQL, Oracle, SQLite, Mnesia, MS Access, Sybase, DB2. Networking: TCP/IP, ISO/OSI, IPv6, Ethernet, VLAN (dot1q), ARP, VRRP, CARP, MPLS L2, MPLS L3, STP, GVRP, PPPoE, VPN, PPTP, L2TP, IPSec, OpenVPN, SNMP, SSH, XMPP, SIP, h323, BGP, OSPF, RIP, IRC, AJAX, Netflow. Virtualization: OpenStack, XEN/Server, Qemu, VMWare, FreeBSD Jail, Chroot. CMS: WordPress, Bitrix, osCommerce, Joomla, RoundCube. Panels: CPanel, Plesk, ISPManager, Webmin.

    Associated with: IntLös

    $35.00 /hr
    313 hours
    4.87
  7. Roney B.

    Roney B. Agency Contractor

    Solution Architect for mobile, web based and SAP applications

    India - Tests: 5 - Portfolio: 2

    I am a Solution Architect with entrepreneurial skills. My skill sets are around niche technology areas and I particularly expertise in solving complex solutions (technology and business) and solve bottlenecks for business. I have worked with SAP for almost 10 years and have lanscaped, designed and perfected heterogenous systems and Enterprise Application Integration. Identity Management, HANA is one more area where I excel. Allow me to serve your technology needs and boost your business. My expertise in relevance to the current technology suites run around various Java Script Frameworks, web applications, REST API, OAuth, Rails, Java/J2EE, CakePHP, etc.

    Associated with: Vertmac Technologies LLP Agency

    $70.00 /hr
    1,651 hours
    5.00
  8. Mariusz Z.

    Mariusz Z.

    Penetration Tester, Linux/UNIX Security Admin,Intrusion Analyst, CISSP

    Poland - Tests: 9 - Portfolio: 1

    I'm Linux Security Administrator & Web Application Penetration Tester with 8 years of experience in the IT field. I'm CISSP (ID# 478556) and OWASP member. My expertise ranges from designing, building secure & robust systems to analysis of subtle software security flaws. I can help you with: - thoroughly security testing your web application (black-box and/or white-box tests) and helping in mitigating detected vulnerabilities - analyzing and assessing vulnerabilities in your application's underlying IT infrastructure - security hardening Linux/UNIX servers/clusters - recommending solutions and best practices on how to design and maintain secure AWS infrastructures - responding to security incident in Linux/UNIX environment, helping in recovery process (rootkit detection, malware removal, etc.)

    $19.00 /hr
    123 hours
    4.79
  9. Giorgi Javakhidze

    Giorgi Javakhidze

    MCITP | Vmware | Windows - Linux Systems Administrator

    Georgia - Tests: 6

    In the last 3 years, I have administered many IT networks, managing over 1000+ users. My core competency lies in complete managing of windows - linux based networks, including Active Directory, Exchange, MS-SQL, virtual clouds, based on VMware / Hyper-V and EVA Storage Area Network. I have deep experience in the following software solutions: Basic server services ( DNS, DHCP, WSUS, Vpn, etc. ) Windows 2003/2008 Server Windows 2003/2008 Active Directory Lync Server, Exchange Server, SharePoint Server. Monitoring: SCOM, Nagios Web Server: IIS, Apache Mail Servers : MDaemon, Postfix. Database: MSSQL, MySQL. Proxy / firewall solutions ( Squid, TMG, ISA ) VMware vShere and vCloud: ESXi, vCenter, vCloud Director, vShield

    $15.00 /hr
    183 hours
    5.00