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    Sergey Nagaev

    Sergey Nagaev

    an experienced system administrator and network engeneer

    Albany, NY, United States

    Network engineer and system administrator with 13+ years of hands-on experience. I have been working with a different network topologies, from office to metro network. I am...Read moreNetwork engineer and system administrator with 13+ years of hands-on experience. I have been working with a different network topologies, from office to metro network.

    I am skilled Unix system administrator, with lot of experience in Linux (CentOS, Debian, Ubuntu) and BSD (FreeBSD and OpenBSD) systems.
    I have got working experience with: DNS; DHCP; HTTP (Apache, Nginx); FTP (vsftpd); SMTP (from old-fashioned sendmail to relatively modern CommunigatePro); SNMP; SMB; VoIP (class 4/5 softswitches, sip); ACL, firewalls and NAT;

    I am proficient in configuring Cisco routers and switches, network designing and implementing.
    I have got working experience with: Switching & Routing; Security (ACL implementation, hardening routers and switches, IDS/IPS; RADIUS, TACACS+); VoIP (Cisco voice gateways, UC, H.323, IVR, T.38/T.37 fax); Monitoring (netflow, flow-tools, nagios, zabbix); Clouds (GCE, AWS, DigitalOcean);

      5.0
      (15)
      $22.22
      /hr
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    Skills

    network administrationnetwork securitylinuxcisco voice over IP (cisco voip)security professionalvoice over ip (voip)

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    network administrationnetwork securitylinuxcisco voice over IP (cisco voip)security professionalvoice over ip (voip)

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    Jun 21 2023
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    Jun 21 2023
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    Projects worked on
    16
    Buyers worked with
    13
    Last active
    Jun 21 2023
    Response time
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    Skills Insights
    network administrationnetwork securitylinuxcisco voice over IP (cisco voip)security professionalvoice over ip (voip)
    • Reviews
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    Hide feedback
    CentOS admin required.
    • Furiosa Ltdby Furiosa Ltd
    • Posted: 2 May 2022
    • 3
    • 23 Sep 2022 Furiosa Ltd
      Furiosa Ltd
      Barcelona, ES

      Great job thanks mate

    • 09 May 2022 Furiosa Ltd
      Furiosa Ltd
      Barcelona, ES

      Good job

    Code a netcat bash script
    • Milesby Miles S.
    • Posted: 15 Apr 2021
    • 2
    • 17 Apr 2021 Miles S.
      Miles S.
      London, GB

      Absolutely brilliant!!

    Configuration opendkim with sendmail in centos7
    • Itzhakby Itzhak H.
    • Posted: 18 Jul 2018
    • 7
    • 22 Jul 2018 Itzhak H.
      Itzhak H.
      London, GB

      check plz

    Website Hosting server update // Website cashing // block bad traffic
    • Giedriusby Giedrius B.
    • Posted: 10 Dec 2016
    • 0
    • 19 Dec 2016 Giedrius B.
      Giedrius B.
      City of London, GB

      Perfect, Recomended!
      Спасибо!

    I find Postfix / Interspire expert!
    • Vargaby Varga J.
    • Posted: 21 Jul 2016
    • 0
    • 21 Jul 2016 Varga J.
      Varga J.
      Budapest, HU

      very quality

    I need DKIM setup / Interspire Email server expert.
    • Vargaby Varga J.
    • Posted: 11 Jul 2016
    • 0
    • 11 Jul 2016 Varga J.
      Varga J.
      Budapest, HU


      fast, reliable

    I need help setting up secure Linux email server
    • Chrisby Chris R.
    • Posted: 3 Feb 2016
    • 1
    • 17 Feb 2016 Chris R.
      Chris R.
      Columbia, MD, US

      Sergey is a professional and talented SysAd. He received the requirements and delivered according to specification and in a timely manner. I would recommend Sergey for future jobs.

    Set Up WordPress On Digital Ocean
    • Ryanby Ryan C.
    • Posted: 23 Dec 2015
    • 0
    • 23 Dec 2015 Ryan C.
      Ryan C.
      Bath, GB

      Sergey did a fantastic job in record time. Job well done, will definitely be buying from him again!

    I need expert in WordPress security to fix my hacked site and remove the malware
    • Sulemaanby Sulemaan S.
    • Posted: 30 Mar 2015
    • 0
    • 09 Apr 2015 Sulemaan S.
      Sulemaan S.
      City of London, GB

      Excellent communication and very helpful in resolving the issue.

    I need a MicroTik router configured with our /26 IP range
    • Williamby William D.
    • Posted: 17 Aug 2014
    • 0
    • 20 Aug 2014 William D.
      William D.
      Exeter, GB

      Good job:)

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