A connection generally refers to a TCP/IP connection, that is established as the result of the handshake between 2 hosts.

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Postfix Send Error: Must Issue STARTTLS command

Running Ubuntu 12.04 and trying to configure postfix to relay send and receive through GMAIL. Am running into connection issues particularly with TLS. Have tried a bunch of troubleshooting solutions ...
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0answers
623 views

java.net.ConnectException: Connection timed out, Tomcat 7 and iptables

I am experiencing a weird problem.. Basically our Java developer said that in the java application the services that access the db to write on it get this error: java.net.ConnectException: ...
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0answers
53 views

VPN Network intermittantly fails to provide internet: What could be possible causes

We have a small office with our own VPN setup. We occasionally experience failures in our internet connection where we cannot access the internet. Most of the time the internet connection will resume ...
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2answers
2k views

Connection closed by IP ( Linux Redhat) while ssh to Amazon server

I am accessing my server on Amazon AWS via ssh and suddenly its no more accessible via ssh. I am getting " Connection closed by 'Live IP Address of Server' " error. I think there are too many ...
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1answer
451 views

apache returning “The connection was reset”

One of my dedicated servers had some network issue today and the data center has to replace some router. Since then the sites on that server returns "The connection was reset" error most of the time. ...
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2answers
4k views

sftp concurrent connection

I have to setup my server to receive 20-30 concurrent sftp connections from different clients using same username. I've tried to test this simulation user connections with scp. The problem is that ...
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1answer
1k views

Unclosed TCP connections in CLOSE_WAIT for various processes

I have cluster of several machines connected on 10GBE network (NICs are Intel 82599EB 10GBE SFI/SFP+) running under Debian 6.0 and faced with problem of hung up TCP connections in CLOSE_WAIT state. I ...
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1answer
758 views

ssh connection refused with out iptables rulles

I changed the ssh port from 22 to 2021 and it worked correctly till 3hours ago,after that when I can't connect to ssh. ssh: connect to host 130.185.72.125 port 2021: Connection refused so I checked ...
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1answer
26 views

Server “connection” implication in a web page load

I'm talking with a "tech guy" and he's asserting that: if a user open a web page (for example www.mysite.com/mywebpage.php) and leaves the browser open, the connection with the server remains open ...
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2answers
447 views

Can't reach remote desktop anymore with RDC

We have a 2 backup machines that we use to manage via Remote Dektop Connection; Suddenly one of them can not be reached anymore by RDC. The other one is still accessible. I can ping the first one, ...
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2answers
641 views

RDP fakout when connectiong: does nothing, no error

Using windows RDP, I'm trying to connect to a remote machine to which I connected fine moments earlier. I had to reboot the server... Now, I type in my credentials and it looks like its working (the ...
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2answers
5k views

Cannot login SQL Server after changing machine name

After installing and setting up new machines in a domain, we decided to rename one of them which had a SQL Server instance installed. So I changed the hostname, everything went fine regarding the ...
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2answers
2k views

IIS Connection String not being inherited

I have an issue where I've set up a connection string at the Machine level in IIS, and it is inherited all the way down as expected... EXCEPT for the application I want to use the string in. Other ...
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1answer
101 views

connection hanging

I'm trying to get to the bottom of a connection problem. My payment processor uses port 4330 and has no firewall for incoming connections. My hosting company blocks this port by default but has ...
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2answers
354 views

Why does the connection break when I kill a process on remote host?

I login to the remote host (debian) by ssh and execute a command like this ssh user@remote_host "ps -ef | grep process_name | grep -v grep | awk {'print $2'} | xargs kill -9' then the connection ...
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1answer
77 views

What type of connection to get for a web server [closed]

I've been doing some research about this topic but I had no luck finding my answer. Will a 2Mbps G.SHDSL connection do the work or should I go with a 5/10/20Mbps Metro Ethernet connection? Or am I in ...
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1answer
425 views

sql server 2008 r2 can connect with connection manager but noway else

I have installed (3 times on 3 machines) sql server 2008 r2 can connect with connection manager but other program cannot connect. I can connect to remote sql servers with heidisql or with my ...
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2answers
1k views

Windows Server 2008 dropping connections [closed]

Possible quite similar to this post but I wonder if someone can help me with this issue. Home Server specs: Windows Server 2008 Standard (Non-R2) 2 NICs, external one(Realtek) has a firewall on it. ...
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1answer
666 views

netstat reports ESTABLISHED connection even after I've pulled the cord

I'm experimenting with lost connections between my java application and my mysql server. The application and the server are on two different machines and I'm pulling the physical cord between the ...
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1answer
293 views

MySQL connection issue with error 2003 / 111

I'm running a mysql server using the following command: mysqld --no-defaults --user=root --port=3310 --bind-address=0.0.0.0 --skip-grant-tables & My understanding is that this command starts ...
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1answer
164 views

Windows Server 2008 r2 Server VPS: every connection capped at 500kb/s

I have a strange problem on a Windows Server 2008 r2 Server based VPS. My provider gives me unmetered and unlimited bandwidth, and obviously full root access (I administer the machine via RDP without ...
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1answer
137 views

Mailserver 1 <--X--> Mailserver 2

First I try to explain my server environment. I have two virtual servers, the host server is Ubuntu. The mailserver is Debian Squeeze installed with this tutorial: ...
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3answers
421 views

Fast, reliable data transfers from/to China

We are a small company and we will need to transfer rather large amounts of data (10GB+ each time) between Europe and China in the near future. As many may have experienced, Internet connections to ...
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1answer
655 views

Network disconnect each day almost same time

I have dhcp server (win server 2008 R2). Got about 30 pc in network. But I am facing problems on 2 of them. I have set IP manually on them. Problem is, that these 2 comps disconnect from network ...
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1answer
74 views

connect to SQL Server 2008 r2

I found about a dozen questions like this, read them all, but still can't find the problem. I have a dedicated server running SQL Server 2008 R2 express. I enabled TCP/IP, added firewall exceptions, ...
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1answer
419 views

Server can't connect to the internet

I have a headless file server running debian that just stopped connecting to the internet. Console output: Dmesg: [ 84.248344] ADDRCONF(NETDEV_UP): eth0: link is not ready [ 85.941389] svc: ...
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2answers
534 views

Clients can make maximum only 15 connections to ubuntu custom server

I have a custom server in C# being run on Ubuntu 9 under mono. I can make up to 15 silverlight clients connect to the server. When I make the 16th, it just waits. And if I close one of the established ...
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1answer
2k views

MAX Connection Pool Setting SQL Server 2008

We are expecting a large number of users to hit a Website built with IIS/.Net 4.0 that our SQL Server 2008 database server is providing data for. The database is around 2GB in size. We are ...
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1answer
143 views

Apache connection pooling

I want to implement apache connection pooling between two apache2 servers. So that there are connections already established and my response time is reduced. I am aware that we need to use either ...
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2answers
610 views

suggest a tool similar to tcpview [closed]

Can anyone suggest a tool for Windows similar to Sysinternals' tcpview which monitor current all connections and also counts and shows traffic/speed?
4
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1answer
7k views

PPTP connection fails with errors 800/806

I've got a client (Server 2008 R2) that won't connect to our production environment PPTP VPN server (Server 2003, running RRAS). The server is behind a firewall that has TCP1723 open as well as GRE. ...
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3answers
998 views

Why cannot connect to SQL Server by the full server name with instance name?

For some reasons, I cannot connect to my SQL Server with full name + instance name (e.g. server_name\MSSQLSERVER) by SMSS. However, I can connect by simply using just server_name or localhost. When I ...
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3answers
1k views

Ping host computer from installed Ubuntu on virtual box

I have installed Ubuntu 11.10 on Virtualbox 4.1.8. My own OS is Windows7 x64. I need having a connection between these operation systems, but there are many choices. NAT, bridge, Host-Only, etc. I ...
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2answers
492 views

TCP what's the purpose of the third step of 3-way-handshake [duplicate]

Possible Duplicate: Why is it 3-way-handshake and not more? Example: If a client wants to talk to a server, it just tells the server that it wants to establish a connection, then the server ...
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1answer
724 views

Slow connection times from remote server doing apache bench

I am trying to measure perfornace on nginx with ab. Doing the same ab from the local machine gives me about 10 times the requests per second as from a remote machine that is located on the same ...
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1answer
127 views

Linux network adapter keeps changing settings

I'm running CentOS 5 and noticed for the past week that eth0 settings keep changing and I have to reset them. Any ideas what it might be or where I need to start?
0
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1answer
134 views

Setting the connection timeout in virtuoso server via connection string

I started the virtuoso service on windows with the following configurations (this is the important part of the config file): ResultSetMaxRows = 10000 MaxQueryCostEstimationTime = 40000 ; ...
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2answers
201 views

Reflect SVN server to /var/www/ directory & 2 other questions

Question 1: I'm setting up a SVN server on for development, how do I serve the files from the /var/www/ which is my root of my website which I'd like to manage the files via SVN that would reflect ...
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4answers
187 views

More important ping or hardware [closed]

I am not an expert so I would ask to you please. We are looking for a dedicated server for minecraft for our community, we have two options: 1. Intel® Core™ i7-2600 Quadcore 3.40GHz incl. ...
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2answers
656 views

Mysql blocked my webserver max_connect_error reached [closed]

Last week end, one of my two webservers was blocked by mysql server. The result is all requests on that blocked webserver show a taylored error page. I'm thinking to implement a script to prevent ...
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1answer
86 views

Accessing database from local network

I would like to access database running on virtual machine which resides in server connected to local network. Here's the whole situation: There is Windows Server 2008 R2 Datacenter running as ...
3
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2answers
849 views

Tracking down “Connection reset” errors in Linux

I'm handling large numbers of concurrent downloads (approx. 500 per server) using Java. All the files are being downloaded from Amazon S3, and the downloading server is an EC2 m1.large instance. ...
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2answers
5k views

How to check fiber connectivity in ESXi 5.0?

On a VMware ESXi 5.0 host, how can I check if fiber storage adapters are properly connected to the fiber switch/SAN, i.e. if the fiber link is up?
0
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1answer
146 views

Is a retransmitted SYN *EXACTLY* the same as the original?

If I have a client trying to connect to a TCP server, and the client sends a couple of retransmits trying to establish a connection, is there ANY difference in the SYNs it will send? If the server ...
6
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4answers
3k views

apache webserver unresponsive with server-status showing all child processes waiting for connection

My setup: i have 3 nearly identical webserver machines serving the same high loaded dynamic website with simple load balancing over dns. The service has been working for over two years with the same ...
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1answer
2k views

Strange Jmeter connection refuse on Tomcat

I tried difference setting in Jmeter and Tomcat. If the Threads number in JMeter is 1~200, Then tomcat is okay. If It is 300, Then after serving few requests, tomcat starts to output errors. Here ...
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2answers
101 views

Keeping connections open

I'm new to cURL and I'm trying to do something reasonably simple. I want to login to a server and download data at regular intervals over a few hours. First, I login to the server - which I've ...
5
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1answer
2k views

Finding short-lived TCP connections owner process

Running tcpdump on local connections to an apache server, I found TCP connections being established and closed immediately every 2 seconds. How do I find which process is responsible for these? ...
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2answers
177 views

Connecting to a Server with Laptops

We have a small office with 7 staff that work in it. We have recently got hold of a server in the bid to keep office work separate to private work. What is the best way for the laptops to connect to ...
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2answers
472 views

Can't connect to SQL Server instance through my app but I can with SqlCmd [closed]

I can't connect my VB app to an SQL Server 2005 instance because "server don't exist or access has been denied" (the Conection String is correct because the app works in other networks and also i ...