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503 (Backend fetch failed) Varnish Cache error

Hello there, I am running a website with high traffic, I've installed Varnish becouse of website speed, when it reaches 2,300 online, it gives me 503 (Backend fetch failed) Varnish cache error.

Maybe there is Varnish installed incorrectly, or there is a script problam wich burns the server.

I also had atack from China/Russia Ip's but I've blocked them via Iptables (firewall)

Server: GNU/Linux 4.4.0-70-generic x86_64 (Ubuntu) , Apache2 installed.

I need server expert with PHP knowledge to fix the issues .

Requirements :

Teamviewer ( highly recommended becouse we have to work with it, for security purposes)

Linux(Ubuntu) Since server is ubuntu.

PHP knowledge in case if website have script issues.

Varnish

Firewall .

If you've read all of this, please type first "I'vedone" in proposal .

Evner: Apache, Linux, Nginx, PHP, Ubuntu

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Om arbejdsgiveren:
( 1 bedømmelse ) Khashuri, Georgia

Projekt ID: #15984965

12 freelancere byder i gennemsnit $133 på dette job

iglobalvn

"I'vedone Hi sir, i have read your requirement carefully. I can fix varnish problem perfectly and exactly without any risk. If you wanna confirm me, please check my work history and portfolio kindly. Then, you ca Flere

$150 USD in 3 dage
(87 bedømmelser)
7.2
kuldeepvk

"I'vedone"" Hi, I will fix all issues and make server live and properly functioning but will not be able to work on tv. Thank you

$177 USD på 1 dag
(271 bedømmelser)
6.8
tangramua

"I'vedone" Hello! I have a team of web developers and system admins. 50% of our activity is web development and 50% is Managed Services. Our developers and system admins have enough skills to succeed in this project Flere

$126 USD in 3 dage
(46 bedømmelser)
6.5
ownmyserver

"I'vedone" Dear Client, Thank you for allowing us to place a bid on your project. We are one of the top Server Management Company in India. Our mission at 365 hosting Support is to provide high quality Flere

$111 USD in 2 dage
(192 bedømmelser)
6.3
talhamq

A proposal has not yet been provided

$100 USD på 1 dag
(174 bedømmelser)
6.0
jonyahmed105

Hello i ve done...........................................................................................................................................Thnks

$155 USD in 3 dage
(128 bedømmelser)
6.2
infihost

Hi, We will check complete configuration of the varnish server and resolve 503 gateway error on the server. Thank you.

$133 USD på 1 dag
(86 bedømmelser)
5.4
chiragdosi

"I'vedone" Dear Project Owner, I am Red Hat Certified Linux Engineer having 5+ year of experience in Managing Core Server | Dedicated Server | VPS Server | Server Security | Server Optimization | Backup and Restor Flere

$150 USD på 1 dag
(32 bedømmelser)
4.9
mayankinnovative

A proposal has not yet been provided

$100 USD in 3 dage
(77 bedømmelser)
4.5
PradhumanS

"I'vedone" , Dear Project Owner, I hope you are having an awesome day so far!!! I am Red Hat Certified Linux Engineer having 5+ years of experience in Managing Core Server, Dedicated Server, VPS Server, Server Flere

$140 USD på 1 dag
(7 bedømmelser)
2.9
lazarobaca

Hello!! It sound like a limited reached by the maxium number of connections, in some part(apache, varnish, max number files opened) that can be causes for unwanted connectoions or so, I can help to diagnose the prob Flere

$222 USD in 10 dage
(2 bedømmelser)
1.9
expertdeveloper8

Hi I've reviewed your complete job description, I have completed lot of projects in my career with high level of my client’s satisfaction , I can strongly assure you that I will be able to provide you work according Flere

$30 USD in 3 dage
(0 bedømmelser)
0.0