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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Mystery WIFI connection interruption

The issue is that Windows users disconnected from WIFI network every 2~10 minutes, Mac users are less frequent but still get kicked off 1 or 2 times a day. We don't have such issue with any wired ...
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1answer
403 views

Can't establish connection between my VPS and itself

I have a VPS with two IP addresses: 74.117.158.92 and 74.117.159.204. If you ping them, you'll find they are both responding. I can also ping google.com etc. from either of them. But I cannot ping ...
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2answers
96 views

Will I get banned or blocked for running a diagnostic app?

This may seem like a simple question. Hopefully it will have a simple answer. I run an internet radio station. There are 3 machines. Music source client Stage server Master server (relays the ...
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1answer
101 views

What is a good way to determine a server's connection usage?

Trying to figure out where my system's connections are being used (i.e. how many connections belong to what processes - could even be filtered by some expression through grep, if it applies). The ...
3
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1answer
165 views

TCP 443 Connection goes into server but never reaches Apache2 (Passenger)

We have some weird problems, when external servers try to connect to our Website on Port 443(TCP) which is an Apache2+Passenger and a Rails Application. The problem only happens rarely. I started to ...
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0answers
93 views

Windows Machines dropping connection to local linux site

Problem We host a website locally for employees to use to complete their work. We noticed once and a while an employee will lose connection to the local website and can not access the site anymore ...
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1answer
569 views

Amazon EC2 unable to connect to instance

I had to change keypair on my instance. I have created an EBS AMI image of the original instance and created a new one with the image. I can ping the instance but ssh connection is refused. One ...
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1answer
134 views

Is the connection from PHP to a different MySQL server 100% secure?

I tried to find this information but was not able to. How is working the connection from PHP to MySQL server. As the password is sored plain, is it also sent plain to MySQL if it is stored on a ...
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1answer
234 views

How do I find out which pairs of a CAT5e cable are actually connected to another machine?

Using Linux (Debian, to be specific) on a laptop, I want to be able to check whether, for example, the TX or RX pairs are both connected to another machine. If, say, I've only connected RX (and am ...
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2answers
6k views

How Connect to Cisco router for the First Time

I recently purchased a new Cisco 881W and I am trying to connect to setup the initial configuration. The last time I did this about three years ago I connected over a serial link to the console port, ...
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2answers
447 views

I can't ping my server from certain IP

I have 2 internet connections from 2 different ISPs with static IPs, lets call them A and B. A connects to the server in several ways (ping, SSH, HTTP), while B cannot do anything (ping, SSH, HTTP). ...
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7answers
62k views

ssh tunnel refusing connections with “channel 2: open failed”

All of a sudden (read: without changing any parameters) my netbsd virtualmachine started acting oddly. The symptoms concern ssh tunneling. From my laptop I launch: $ ssh -L 7000:localhost:7000 user@...
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1answer
539 views

Do AWS ELB, HAProxy or nginx drop the connection if a backend servers is down?

I wonder which ones of the following load balancers is able to detect an unavailable backend machine, and redirect the connection to another server without dropping the request: nginx AWS Elastic ...
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2answers
10k views

Connection refused after apache update

After I updated my apache, none of my virtual hosts are accessible anymore, the server responds "Connection refused". No errors are in the logs and I have no idea what is causing this. My virtual host ...
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1answer
9k views

Able to connect by SSH, but not x2go

I am having trouble connecting to a remote server with X2GO using a DSA key. Connecting works fine over SSH, but when I try to connect with X2GO, it goes immediately to the username/password box and ...
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1answer
6k views

Why my scp is working one side only? “Lost connection” SCP transfer

I'm trying to transfer a file via ssh but it works only from PC1 to PC2 but it doesn't work backwards. I've checked my ssh_config files and both are the same. Which is basic: Host * SendEnv LANG ...
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1answer
461 views

Connection speed required for webhosting server [closed]

I'm interested how to calculate required speed for and connection that will be used for webhosting server? e.g. I have a server with around 300 websites ( they do not have large traffic on them). ...
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3answers
4k views

Cannot connect to mysql database remotely using jdbc

I am trying to connect to my database which is hosted on 000webhost. I am connecting from SmartFoxServer, and they allow database connections. All you have to do is change some of the settings in the ...
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2answers
953 views

SLES11 random unreachability from a single machine

I'm experiencing a very weird problem and I am lost hard now. I have set up several Suse SLES 11 SP2 machines since my company tries switching to SUSE. And every single machine with SLES 11 has this ...
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1answer
126 views

Alter new and existing session Command Timeout value

My first post so please me... I’m a self-taught DBA in a manufacturing environment full of engineers who like to fiddle. Although I have not given them sysadmin or any explicit extra rights I have an ...
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0answers
2k views

SQL Server Replication Requires the actual server name

How Hard can it be? Ive spent the last 4 hours googling just to find either nothing works, or people randomly posting information that 'sounds good' My setup: Two SQL2012 Servers, in two different ...
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2answers
143 views

How to solve this IP address/connection conflict during server move?

I'm trying to move the content of a Windows 2008 server to a new hardware and encountered the following problem: The IP should be moved with the server to avoid changing lots of DNS records. ...
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1answer
2k views

apr_socket_recv: Connection timed out (110)

I have nginx/php-fpm running but I am getting the following: apr_socket_recv: Connection timed out (110) This is a massive big box. 16 cores/24GB RAM What do I need to tune to increase the allowed ...
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2answers
124 views

Connection refused for a few hours

I use a Linode server, and have had about a half-dozen domains running on it for the past couple years without issue. It's running Ubuntu 10.04 and Apache. Today, for about 3 hours, all http requests ...
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1answer
2k views

how to solve the error: “ssh_exchange_identification: connection closed by remote host”

I have been researching for hours and still unable to solve my problem. This error "ssh_exchange_identification: Connection closed by remote host" has many proposed solutions but none seem to solve ...
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0answers
445 views

Random, sustained connection failures

My first question here - hope I'm in the right place. In essence, I have a Java app that occasionally seems to have difficulty connecting and I've run out of ideas for where to look. Hoping for some ...
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1answer
179 views

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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2answers
765 views

OpenSSH Can't Connect on Fedora 17 [closed]

Having trouble SSH'ing to an internal server that is outside of an enterprise level firewall. I have a fresh install of Fedora 17. Here is the command I'm running: ssh root@<example-domain.my-...
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3answers
151 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 6....
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votes
2answers
6k 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 192.168....
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1answer
85 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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1answer
354 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 ...
3
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1answer
3k 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
304 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
2k 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
2k views

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
73 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
559 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
97 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 ...
1
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1answer
2k 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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2answers
99 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 ...
0
votes
1answer
6k 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 ...
0
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1answer
89 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 ...
0
votes
1answer
370 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 ...
3
votes
2answers
16k 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
740 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
89 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 ...
3
votes
1answer
4k 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
65 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
2k 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 ...