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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opening firewall 1433 port to IP address that require a direct connection

We are upgrading from sql server 2005 to sql server 2008 and windows server 2008 R2. New server is behind a firewall, we have 30 or so windows XP machines, that will require the port 1433 to be ...
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3answers
112 views

What would prevent non-domain devices from connecting to an IIS web server?

Web Server AD with 2008 Domain Controllers Windows Server 2003 IIS 6.0 Virtual Directory / ASP.NET 4.0 / MVC 3 Anonymous / Integrated allowed Device Motorola MK 3000 Price Checkers Windows CE ...
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2answers
3k views

Can not mount NFS from server on local network

I set up my NFS server without doing any bigger changes in configuration files. After that I added these entries to /etc/exports(both paths are valid) on server(192.168.1.11): /export ...
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1answer
76 views

Connecting to samba ubuntu server from linux

In these days I'm setting up a small network with about twenty computers. The users of this network used windows before (now they use linux mint) and they need to access samba ubuntu folders simply ...
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275 views

SQL Server 2008 intermitent error 40 running parallel queries

Here's our setup : We are using Red Gate SQL Multi-Script to run queries on our ~1000 databases which reside on a single SQL Server 2008. SQL Multi Script can be configured to run queries in ...
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1answer
2k views

Windows server closes TCP connection immediately after sending SYN+ACK

After a proper SYN, SYN+ACK and ACK TCP-Handshake, the server immediately sends a FIN+ACK indicating a graceful connection closure. The client's HTTP requests results in RST packets from server. This ...
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0answers
145 views

what can put linux process managing connection pool into bad state, so it restarts them continously?

I have an application with pool of connections to MySQL. At some point, in production, every 1-3 seconds some socket is closed. As a result my app restarts this connection. This is pretty big pool ...
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1answer
702 views

Wireless Access Point connection benefits over Wireless Routers

While I was doing research on wireless connection limits, I stumbled upon this question. Zypher's answer seems to suggest connection capacity benefits of wireless access points over wireless routers. ...
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2answers
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What limits the number of clients that can connect to a wireless router? [closed]

After browsing serverfault and superuser for a while, I have noticed many posts about wireless router connection limits such as this one and this one. The sane limit for a router (without dropping ...
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1answer
68 views

What are some simple ways to capture network failures/drops to requests sent to a sql server?

What are some simple ways to capture network failures/drops to requests sent to a sql server? SQL Server comes with a Profiler tool, but doesnt seem to log dropped requests, instead only successful ...
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2answers
412 views

Nothing Can Access MySQL

I have been trying to install WordPress, but I get the error, "Error establishing a database connection". I realize this is a common error, but after a few hours, I haven't found any solutions that ...
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1answer
87 views

postfix stops accepting connections from certain IPs

I had postfix up and running, and I think it was complete, although there was still a little testing to do. But at some point, it stopped accepting connections from my home computer. I tried to telnet ...
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1k views

How to connect with a vpn connection without any prompt in windows 8

In windows 7 , we can define a hotkey for connect to internet via VPN connection immediately without any prompt, through these Steps: Create shortcut for VPN connection for example in Desktop. ...
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69 views

Unable to SSH into EC2 instance on Fedora 17

I did following steps But I am not able to SSH to it(Same steps work fine on Fedora 14 image). I am getting Permission denied (publickey,gssapi-keyex,gssapi-with-mic) I created new instance using ...
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1answer
5k views

MySQL remote access not working - Port Close?

I am not able to get a remote connection established to MySQL. From my pc I am able to telnet to 3306 on the existing server, but when I try the same with the new server it hangs for few minutes then ...
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1answer
72 views

Allow connection to certain port from specified domain

I got two domains, which are pointing on the same IP address, I can use both to connect to the server or certain port (TeamSpeak), the problem is that I would like the only one domain from those two ...
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1answer
246 views

Website pages very slow to load on first access

I have a production web server that makes sites to be very slow when load for first time. After the first time all connections are normal and fast. In the following screen you can see the first test ...
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2answers
8k views

Increasing of max (more than 10) TCP Connections

I have the following problem on one of my servers: On other servers max TCP Connections is dynamical and much more higher than 10. How to increase max TCP Connections in this server in Windows ...
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2answers
351 views

website connection reset on first load

i'm using nginx with php-cgi. lately a problem has arose where if you don't view my site for a while, like 3-4 minutes, and then open it again, the first request you send will return connection reset ...
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1answer
78 views

APACHE httpd.conf error

I have recently installed the latest Apache. It is working fine through localhost:80 and through 10.0.0.51:80, but I can't connect through [External IP]:80. I have forwarded ports correctly, but I ...
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1answer
3k views

nginx connection reset

When first visiting my site after not visiting it for a few minutes, the connection is "reset" 100% of the time. I get this message when debug is turned on, along with a 400 bad request status ...
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1answer
63 views

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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2answers
1k 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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1answer
880 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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1answer
60 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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560 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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3answers
1k views

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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2answers
6k 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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2answers
144 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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4answers
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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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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1answer
2k 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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1answer
237 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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1k 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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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
11k 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
633 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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319 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
136 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
300 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
5k 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 ...
6
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1answer
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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1answer
811 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
782 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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1answer
130 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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2answers
299 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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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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1answer
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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