Questions tagged [connections]

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many connections to one of our website

We are hosting multiple websites with Nginx as an SSL terminator. All traffics are proxied through Nginx to backend servers. There are many connections to one of our websites, netstat shows: # ...
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1answer
109 views

Data Factory Linked Service for Google BigQuery KeyFil Path

In Google Cloud I have a BigQuery account and I have a Service Account defined there. I want to set up a Linked Service in Azure Data Factory so that I can extract data from BigQuery. I have generated ...
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1answer
29 views

How to configure IIS 7.5 to allow more than one PHP connection per browser?

On our dev server, I hit /bigreport.php, which connects to MySQL and runs a report. It takes a few minutes. In another browser tab, I navigate to /smallreport.php, which connects to MySQL and runs a ...
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23 views

Why is server is waiting with second request untill first is fisnished

Not sure what it is, but everytime I try to run one http request from browser, second must wait for first to fisnish. Is it server side configuration/seciurirty? For example, I have 2 files long.php ...
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132 views

HAProxy Stats Page Error

HAProxy is running fine. Stats page shows 0 req/resp errors for all of my servers. However the stats section (see screenshot) shows 167 Errors under the Stats sections "backend". As you can see there ...
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1answer
66 views

Postfix: define a global concurrency_limit

I need to limit the simultaneous outgoing connections Postfix can make. It is possible to limit the number of connection per destination with transport_destination_concurrency_limit, but not globally ...
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1answer
27 views

Azure components connectivity check

My Project involves various azure products like web job, Event hub, table storage, blob storage etc. I need to create a Live dashboard which shows the connectivity of the various components. Eg., ...
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1answer
26 views

I have 6 wan connections, what's the best way to load balance them?

5 diferent companies are going to share the same building, and each one of them have one internet link. I have to use all of the links because of bureaucracy stuff. My server only have 4 LAN boards. ...
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1answer
216 views

Increase number of rsh connections [closed]

We are using a Server with OS RHEL 7.2 server version. Number of rsh connections to the system is limited to a number around 70. We are getting a message Connection reset by peer from server as that ...
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2answers
102 views

FTP sites can't be accessed from GUI programs, only command-line

We have a Windows Server 2012 R2 box, running IIS 6.2 (Build 9200). This is a Rackspace server. The server was running one FTP site, with no issues. We had worked with Rackspace originally to get ...
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1answer
462 views

Identify failing or hanging outbound network connections on linux

I admin a busy webserver which uses nginx/php-fpm , connects out to mysql(RDS) and elasticsearch, but also many third parties for advertising and other plugins etc are on the site(unfortunately I’m ...
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513 views

Sudden increase nf_conntrack / ip_conntrack

Often there is a sudden increase in ip_conntrack connections on my server. (See image below). This sudden increase results in a abnormal increase in SYN_SENT connections.(see screenshot) This is a ...
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2answers
409 views

Is it possible having two Ethernet connections simultaneously on the same UTP Cat6 cable? [closed]

Actually it is a two part question. 1.Since an ethernet connection only requires 2 pairs (green and orange), is it feasible to wire blue and brown pairs to a different Lan port of a router and ...
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2answers
68 views

Can a average computer configured as a router support any number of users (connected clients)? [closed]

I am planning to install a router for a rather big amount of users (50-100), and I have found home routers very unstable for this high number of devices. When researching, I have found this report ...
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1answer
342 views

Trying to estimate concurrent connections on my server - is this the right approach?

My goal is to find out, roughly, how many apache2 connections my server can handle at one time. I've gone through all of my running processes, including the apache2 processes, and figure that of the ...
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1answer
10k views

How to allow more than two simultanous sessions on Azure

One of our servers is on Azure and we are remotely connecting to it. Unfortunately Azure allows only two users to be logged in at the same time. When the third user tries to log in, he is given the ...
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1answer
305 views

A LOT of connections from my external IP address to my web server

I installed Nagios recently on a Debian machine running an Apache web server among other things. The thing is that lately, Nagios tells me that the HTTP service is failing intermittently and it seems ...
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1answer
955 views

Connecting two GNS3 setups in two VMs in the same PC

How do i connect these two gns3 setups in different VMs? It's all in the same PC. My end goal would be to ping each VPC to each other. I am already able to ping VPCs in with different VLANs but only ...
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1answer
49 views

connection initiated from linux localhost

One of the linux server was compromised and some of the connections are being originated from localhost to a remote location putting up the information residing on it. I'm trying to trace all outgoing ...
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2answers
1k views

increase nginx active connection more than 65535

currently I'm doing setup for nginx to accept C1M, I do in my Virtual BOX with Centos 7.0 and RAM 10G. Here my sysctl.conf configuration. fs.file-max = 9999999 fs.nr_open ...
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1answer
385 views

MySQL connections not closing

I have a web application running on Tomcat7 that connects to MySQL 5.5. I have two servers running the identical code: Ubuntu Red Hat The Ubuntu one runs fine maintaining a steady 8-16 connections, ...
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3answers
124 views

3x networks, hardware in 2 locations, 1 connection to join them

Sorry it was hard to think of a title for this, so hopefully I can explain my situation. We have hardware (unix servers) on 3 different network subnets. For example: 10.44.1.0 10.44.2.0 10.44.3.0 ...
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0answers
96 views

How do I figure out the number of concurrent connections?

Our server architecture is as follows: Windows 2008 Server RC2 WampServer with Apache 2, PHP 5, MySQL 5 Dedicated connection hits firewall, which is routed to a single web server with multiple vhosts ...
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2answers
1k views

FreeBSD Established Connections Maxing out at 300

We've previously had issues in our environment where it seemed we were reaching FreeBSDs max connection limit. We took action demonstrated by http://nginx.org/en/docs/freebsd_tuning.html and bumped up ...
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1answer
713 views

Open file count keeps increasing forever

I'm experiencing issues with the number of files opened increasing over time. If I run my server for about few hours, it'll no more accept any connections. The limit was 1024. I've increased the limit ...
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1answer
561 views

nginx and Mysql Server Load limits (depend on Server config)

my server config is Technology: Ivy Bridge Processor: Intel Xeon E3 1245v2 Intel Smart Cache: 8MB Cores: 4 Threads: 8 Frequency: 3.4GHz+ Turbo Boost: 3.8GHz Virtualization: yes ...
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1answer
376 views

syslog-ng 2.0.9 closing tcp connections from some clients instantly..?

I've a syslog-ng instance on 2.0.9, which is old, but... this is enterprise IT and upgrading the versions is... fun... running on Solaris 10. I have this strange problem where some clients stop being ...
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1answer
247 views

minicom cmd not showing

I am using minicom in centos to try to connect to a cisco router. I did the configuration with minicom -s changed the serial port to the appropriate one /dev/ttyS1. Saved as dfl. and Exit. When ...
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1answer
24k views

Too many established connections left open

I have a (probably quite old) CentOS 4.5 server with a custom java application running inside. I found the application was crashing after some running time and found it was handling 1024 connections ...
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2answers
107 views

aggregating multiple ISP connections

OK, so we have an office in Pakistan. Phone and ISP service is pretty poor there, so they have 2 ISP connections, one thru Pakistan telecom, one thru a different ISP. The PK tele one has a router that ...
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1answer
496 views

Can multiple servers listen on the same port when no Bind/Accept has occured

When you have a Windows machine (server or home edition) which is running 2 servers, and they are both listening on port 4000, however none have had a request to connect? What happens when a client ...
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3answers
32k views

Can ping servers but cannot connect to them

Sorry in advance if this question is a bit newbi-ish. I downloaded Microsoft Connection Manager and added multiple .rdg files for different servers I need to access. I can browse to only a few of them,...
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1answer
3k views

Mysql remote connections logging

I need to allow remote connections to my mysql server running on latest stable CentOS. I don't like this idea at all so I want at least to collect as much relevant information as possible. To be ...
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3answers
64k views

What value of thread_cache_size should I use?

I'm using Asp.Net together with MySQL. In the .Net connection string, I have set Max Pool Size to 150. If I run the following I get these values: SHOW GLOBAL STATUS LIKE 'max_used_connections'; ...
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2answers
2k views

Windows 7 Network Connections empty

Whenever I try to look at my network connections, the window opens up empty. The only thing shown is the Organize button. I went into Device Manager and deleted my network devices, but now ...
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2answers
479 views

On a LAMP stack, how to limit the number of concurrent connections and serve a static page for those who are beyond that limit?

I'm aware of the Apache directives MaxClients and ListenBacklog. I'm trying to set a limit of, let's say 100 concurrent connections after which the new connections will be served a static page. Can ...
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1answer
8k views

haproxy and persistant connections

I am using HAproxy to load balance between more web server. Those webservers are using PHP and sessions to keep one's session open. Now, I think that when a user refreshes the page, it is sent to one ...
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1answer
3k views

limiting the number of global connections per second

I want to limit the number of ALL incoming NEW connections on a port, not only from one IP, something like: iptables -I INPUT -p tcp --dport 22 -m state --state NEW -m limit --limit 3/s -j DROP But ...
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2answers
1k views

How can I connect to some old Sun servers?

We have some old Sun servers (V125, V210, V240, T2000 amongst others) sitting unused and I've been asked to find out if there is anything useful on them before they get wiped and disposed of. However,...
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2answers
721 views

CentOS 6.2: apache stops accepting connections

I have server with CentOS 6.2, apache 2.2, php 5.3, mysql 5.1. Server is installed in KVM container. From time to time apache stalls. It just stops accepting connections. Looks like it reaches ...
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1answer
3k views

windows 2008 R2 server IIS 7.5 not loading pages on first visit…requires refresh 2 or 3 times

This could be a network thing at my ISP where my box is colocated...not entirely sure. I wanted to just check here to see if anyone has seen an issue like this that is server related so I can check ...
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1answer
472 views

Best way to connect two separate networks with separate internet connections within the same building

I'm a programming intern, and since I'm the only one in the company who seems to have rudimentary knowledge of Linux I've been given the task of setting up a network so that employees may share files ...
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2answers
5k views

Very large number open connections from web to DB server

I run 2 servers, 1 web (nginx/php), 1 database (mysql). Nginx has about 1500 active processes per second, and mysql status shows about 15 currently option connections on average. Now today i started ...
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3answers
709 views

Cached content causing a huge number of 404 errors, too many connections

My site has been largely unresponsive for three days due to a large amount of traffic. A JavaScript element on the page regularly requested images from the server, and the number of connections ...
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4answers
22k views

How do I check how many connections are open currently on a specific TCP port?

I'm doing some comet benchmarks and would like to see how many open connections I have. Actually I use netstat: netstat -ant | grep 8080 | grep EST | wc -l But it needs around 4-6 minutes to list ...
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1answer
54 views

Switches and the amount of load

Out of curiosity does anyone know whether it would be more beneficial to have more switches with less terminals on each leading to your main switch OR load up each switch fully before having any ...
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2answers
1k views

How to monitor/log internet up time

I have home network setup, where I have 1 thomson wifi router, 2 telephones, 1 tv, 1 desktop and 4+ laptops. I have the Estonian standard internet of ~15 Mbps for the last 4+ few years. The desktop ...
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1answer
937 views

When Does the Linux & Windows' Samba Port Connection Close?

After connecting to a samba share, then disconnecting, netstat still shows that the ports are ESTABLISHED, even when the clients are on SUSPEND, HIBERNATE, or have SHUTDOWN. Looking over the samba ...
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1answer
13k views

Find out which users are connected to a shared printer

Today we're migrating to a new file and print server, which made me wonder, is there a way to see which users are connected to a shared printer? It's possible to see connections to shared folders in ...
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3answers
2k views

how can a server handle lots of port 80 connections

Admittedly this is a simple question but 20 minutes of googling and I just can't find an answer... I will frame my question with an example. say I own www.reallypopular.com and my website sees 100 ...