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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Network connection on Linux

A general question about network connection on Linux : once a network connection goes into time_wait, is it still tied to the process ? Does it still use resources like say filehandle ? Reason I ask ...
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749 views

Can't Connect To Local Mysql Using IP Address, but CAN connect from remote server

Here's an interesting one that does not seem to fall into any of the mysql connection issues I've read about or searched for: On an Ubuntu 12.04 box I had some system updates waiting to install, and ...
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653 views

https lingering TIME_WAIT connections

From my client PC I'm connecting to a webserver, it uses HTTPS only. When I connect I see in TCPView (sysinternals tool alternative to netstat) a lot of TIME_WAIT connections to the https endpoint. ...
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51 views

DNS CNAME record - connection was reset

I am quite new to DNS and have set up a CNAME record for a new domain that I have bought pointing at subdomain.domain2.com. When I put in my URL http://www.domain1.com I get The connection was ...
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396 views

Error when starting Windows Service: Connection “actively refused”

I have used .NET to create a service installation package (msi) that, when run, installs a Windows service designed to run an instance of Apache Solr (to aid in searching from a web application). I am ...
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How to configure 2 NICs with 2 different gateways?

I have a server with 3 NICs running RHEL6. eth0 is connected to the intranet. eth1 is connected to the Operations and Maintenance Network eth2 is connected to an automated backup network (doesnt ...
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4k views

TCP connection stuck in SYN_RECV state despite ACK received, Linux 2.6.18, embedded, ARM

My client cannot connect to my protocol port (TCP) after some network glitches, even though all other protocols (telnet/HTTP/FTP) work fine. netstat shows that my server is listening and tcpdump on ...
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141 views

Effects of internet connection speeds on server queries

Can my internet connection significantly effect queries run on phpmyadmin? I am currently 18 down and 30 up. I switched internet connections today and noticed a deep drop in query performance. The ...
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1k views

How to wire 20 computers and 20 phones and 1 server into LAN?

I have currently 3 switches Two Netgear JFS524 with 24 slots, One Belkin with 16 slots. Server DSL Internet Router. Main question is how to connect switches together, two Netgear's are next to each ...
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3answers
111 views

Log connections to program

Besides for using iptables to log incoming connections.. Is there a way to log established inbound connections to a service that you don't have the source to (suppose the service doesn't log stuff ...
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1k views

Connecting To FMS Server Issues

I am trying to get my computer to connect to an Adobe Connect server but I have had no luck. The error that Adobe is telling me is "ERROR: FMS Server did not return correctly!" and have done some ...
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229 views

apache local network

I am trying to reach my local Apache from another source in the local network. The IP of the machine running Apache is 192.168.2.36, the os is xubuntu 12.04. Via this machine I can reach the Apache ...
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SQL - an error occurred during the pre-login handshake

Until yesterday evening, I was able to connect to my server from my local machine. Now, I get the following error: A connection was successfully established with the server, but then an error ...
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832 views

Enable: Asp.net connection pool monitoring with performance monitor

I'm a C# developer, but I'm running in a system management issue here. Intro: I'm suspecting that an ASP.NET application is having some issues with the connection pool and that the pool is flooding ...
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7k views

Cannot telnet to SQL Server on port 1433

I've been working solidly on this issue for the past three weeks. I cannot seem to find where the actual issue is. I just recently found this article on how to troubleshoot the connection. I made it ...
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4answers
9k views

Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) on subsequent connection through terminal

My sincere apologies for asking something that obviously has been answered before. The fact that I'm posting is that i would like to be absolutely sure since it's about a live server running ...
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0answers
46 views

How normal are remote connection faults and what do they mean? [closed]

Quick background: I have been having a lot of connection issues with my home network. I finally got my ISP to understand and after them checking some of the problems outside of my home I've gone from ...
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1answer
543 views

Where do you find logs about connections on debian?

I installed nginx on debian and then tested it with wget localhost and wget 192.168.1.11 to see if it responds to simple requests. After this i changed the default root folder to /var/www and tried ...
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290 views

Mac Mini Server network connection issue

We have a Mac Mini connected to our network and are using it as our mail server which works fine. The issue is that we have a photocopier/scanner connected to the network and we can't send scan a ...
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1answer
121 views

Java Tomcat SQL 2005 connection failed

I am in a bit of strange situation when it comes to debugging this issue. I am working with a client who has a 3rd party administrate their servers, and that 3rd party does not allow for any changes ...
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1answer
249 views

Keep-Alive is active, where is the close coming from?

Apache server SuPHP (php as CGI?) When I look through phpinfo, I see Keep-Alive as being active/on. When I use tools like RedBot, I see Connection: Close If I set Headers (via htaccess or php) as ...
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1answer
4k views

TCP connection reset in linux(strange packet loss) but not on windows

It is all good on windows, but on linux when I try to retrieve a specific web page, I get a long wait and then a "connection reset by peer" Pinging destination IP works fine. I tried to reduce ...
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2k views

Load balancing MySQL using HAProxy: Got an error reading communication packets?

I've set up load balancing MySQL slaves using HAProxy via a xinetd. 2 load balancers shared a virtual IP that is managed by Pacemaker: crm configure show: node SVR120-27148.localdomain node ...
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691 views

iftop Shows Lots of Mysterious Connections - Not Showing in netstat

I've just stopped all pretty much all services except sshd on my server (Ubuntu Server 10.04), and when I run iftop I get output that looks like this: 12.5Kb 25.0Kb ...
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1answer
648 views

Connect to server via SSH2 [closed]

I'm using http://www.hetzner.de/en/. They send me something like that: Your Hetzner-Server is now active. Thank you for choosing Hetzner Online as your Web Hosting partner. You can access your ...
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117 views

PCs losing connection to server

I'm going to try my best to describe the problem since I'm not the SysAdmin! At my office, we have multiple PCs who connect to a Microsoft Server 2003 - Entreprise Edition. We didn't do any ...
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294 views

Mysql too many connections but not visible in fullprocess list

I got a big problem, I guess it's something like a dos attack but I am not sure. Since this morning, my database is very slow and gives me 7/10 times a too many connections error or tries to login ...
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1k views

Out of nowhere, ssh_exchange_identification: Connection closed by remote hot me too

See similar: Out of nowhere, ssh_exchange_identification: Connection closed by remote host Today, 6/19/12 attempting to ssh to the same host as usual ssh replied ssh_exchange_identification: ...
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1k views

Increase Openfire connection pool - maximum connections

I have Openfire 3.7.1 install on Linux (RHEL). How I could increase maximum connections? Current values: Maximum Connections: 25
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7k views

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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544 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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50 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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469 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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341 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
3k 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
731 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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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
363 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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348 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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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
96 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
317 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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75 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
366 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
971 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
577 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
248 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
158 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 ...