Network and email server security

A specialist in computer network security is required in CentOS 7 operating systems, to configure an email server (Postfix) in order to prevent reporting of the unwanted email list, and to try to optimize the security and speed of the network.

Example: Remove the botnet reported in the following url with the IP [login to view URL]:

[login to view URL]

Our network is in Medellin, Colombia. There are about 6 server with CentOS 7.
All traffic pass over Microtik router.
The problem is that we don't know what is the inffected server.
Mail server is Postfix/Dovecot. We need to install TLS certificate too.
The purpose of the project is when we send a email from our server don't arrive to junk mail.
No control panel, all server administration is via bash.

Umiejętności: Bezpieczeństwo komputerowe, Linux, Administracja sieci, Administrator systemu

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O pracodawcy:
( 0 ocen ) Colombia

Numer ID Projektu: #17170210

22 freelancerów złożyło ofertę na kwotę $144 do tego projektu


Hi there! I am a system administrator security focused with 5+ years of experience configuring and securing servers. I can deploy your mail server with the proper security settings to avoid spam and mail headaches in t Więcej

$230 USD w ciągu 5 dni
(35 Oceny)

Hi, I will configure postfix on server for mailing and implement authentications like spf,dkim,dmarc,etc. for good inbox delivery. Thank you

$77 USD w ciągu 0 dni
(179 Oceny)

Hi, I will setup email security on server as per your requirement, will disable open relay and implement security for email server and firewall. Thanks

$155 USD w ciągu 3 dni
(135 Oceny)

Hi, I have read your project description and would like to offer my services. I am a certified network consultant having nine years of experience in network and system administration. I am proficient working with su Więcej

$155 USD w ciągu 3 dni
(47 Oceny)

Hi, server expert here. I can help you in setting up the email server. Please find my previous project reviews in the following freelancer profile link: . Will complete t Więcej

$83 USD w ciągu 3 dni
(76 Oceny)

Hi there, I am IT Security professional with more than 4 years of hands on experience. I can fix and secure your email server. lets discuss to start. Thank you. Best Regards

$177 USD w ciągu 4 dni
(28 Oceny)

Hi, We will migrate the mail server from windows server to centos server without any data loss. We will also optimize the server. Thank you.

$66 USD w ciągu 1 dnia
(41 Oceny)

C7 #!{guru root} is a technology company with 12 years of experience, specializing in computer networks and systems. Founded in Buenos Aires between the design district and technological GuruRoot from members of a rese Więcej

$222 USD w ciągu 10 dni
(3 Oceny)

Hello, I have a team of linux server admins and developers having experience of more than 5 years. I can do this project for you as I have done similar projects several times. Let's come over chat-box for further info Więcej

$125 USD w ciągu 1 dnia
(37 Oceny)
$66 USD w ciągu 1 dnia
(10 Oceny)

Hire me. I'm an Email & DNS Server, SMTP, Spam Control, Postfix, Exim, PowerMTA, Interspire, MailWizz, Email Marketing Expert, Web Designer, Linux System Admin, AWS & Google Cloud Expert, Web Security Analyst & Websit Więcej

$150 USD w ciągu 1 dnia
(16 Oceny)

Hello, I'll install postfix and will implement all server Security techniques. I have more than 3 years experience in the same. Thanks

$66 USD w ciągu 1 dnia
(2 Oceny)

Hi, Good Morning. I am Introduce myself about my skills and work procedure for IT Related Works. I have to process manner is a Corresponding with client , Timely Deliver , Focus on Client Requirement, Find the Root Więcej

$155 USD w ciągu 3 dni
(5 Oceny)

Hello, I can help you . I am a Security expert with 10 years of Professional experience. I am Certified Cisco Engineer with 10 Years of working Experience with Google Inc , T-Mobile USA and Fedex Corp . Certifica Więcej

$222 USD w ciągu 3 dni
(1 Ocena)

working the gov sector where cent OS is used in gov office so no issue in solving your issue ill work on it within hours

$66 USD w ciągu 1 dnia
(0 Oceny)

we are a team of Network and Server Security, and we are very confident & expert in this field. we had worked on Linux, MAC and Windows Operating System and good experiance in security & speed optimization of email ser Więcej

$166 USD w ciągu 3 dni
(0 Oceny)

At this time im working in datainfosys ltd. this company provide mail service(xgen plus). so i know very well how to create mail server and its security...

$111 USD w ciągu 2 dni
(0 Oceny)

we have already done this work, if you want to see the result you can try a demo link: [login to view URL] Email: demo at [login to view URL] Password: prova0987

$40 USD w ciągu 2 dni
(0 Oceny)

Hello, As per your requirement. I will be perfect and suitable for this project. I have more than 6 years experience in Network administration, CCNA, ISP, ASP.NET and the .NET Framework using C#, HTML, JavaScript, Więcej

$155 USD w ciągu 3 dni
(0 Oceny)

I can do

$155 USD w ciągu 3 dni
(0 Oceny)