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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Google DNS is too slow connecting to Google APIs

I have a linux server in Germany. The server is configured with Google DNS. When I call from the server some Google API, the connection is too slow, it takes always 2 or 3 seconds to connect to the ...
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1answer
310 views

How do I know that my TCP connection is safe from the Firewalls/NAT?

Being on the Azure cloud, I found that the firewalls there drop connections between the Web server and the database quite often. Mostly when there was some inactivity, I think something between 5 and ...
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0answers
170 views

Remove hosts from Hyper-v virtual machine connection list

When using the Hyper-V Virtual machine connection program to connect to a VM on another host, you can type the name/IP of the host in the first drop down, and then the second dropdown populates with ...
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1answer
944 views

postfix deliveries per connection

hope you can assist me in this case. I am administrating an Postfix server which is used for newsletters. Recently one of the major recipient domains changed their policies to only accept one email ...
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1answer
181 views

How to allow remote connection to MySQL only for specific accounts in CentOS VPS?

I have a CentOS VPS. Port #3306 for MySQL is open for all customers, and they can connect to their databases remotely. As this can be a cause of security issues, I would like to stop all remote ...
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2answers
91 views

Cisco Switch went mad

tI have a Cisco SLM2048 Smart Switch which I can't access anymore. The switch is working just fine but: I can't reach it by web interface Doesn't seem to be able to reset it, even if I hold reset ...
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1answer
111 views

Show statistics for ssh connection

I am suffering since a long time an ssh timeout with one of my hosts. I have tried several things, including changing ClientAliveInterval and ServerAliveInterval, but I do not get it to work. I would ...
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1answer
886 views

Is weblogic 10.3.6 data source connection pool maximum capacity per domain or server?

My WLS server is connecting to an Oracle DB that has a maximum concurrent connection limit of 3. I have created a data source in WebLogic and set the "Maximum Capacity" value to 3. Is this value ...
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1answer
333 views

How to profile which SQL server a .NET application tries to connect

We have a huge .NET application from 3rd party that would be time consuming to disassemble and understand the code. It is compiled in Release mode. Connection strings to the MS SQL databases are ...
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2answers
308 views

Using pconnect on several databases in PHP on Apache2

I am running PHP in preforked(MOD_PHP) on an apache2 server. The setup is on linux Ubuntu 10.04. The database I am using is a firebird database 2.5.2. The apache2 server are running in a web cluster ...
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2answers
574 views

Connecting SAS drives to Server which supports only SATA

Is there any adapter or connector available to connect a SAS drive to a Server having motherboard which supports only SATA drives. It is ok if can connect it for temporary. I need to transfer some ...
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2answers
418 views

MySQL connection errors when client server bandwidth is exhausted

I have several servers with a lot of outgoing traffic using nginx. When the bandwidth is exhausted (1Gbit), I have problems connecting to my mysql server from those servers. The connect always fails ...
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2answers
241 views

Linux: Find amount of “active” connections on one port

i need to monitor how many users are actively connected to one port on debian. I know i can do it with command netstat -na |grep $port |grep ESTABLISHED |wc -l which really gives me result - a ...
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1answer
187 views

What packet to ignore to not have ssh terminated on brief connectivity loss?

It seems like sometimes there are some connectivity problems around the edge of our network to certain other networks, and my ssh sessions with some remote servers, which themselves have no ...
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2answers
145 views

SSH connection times out unless I tunnel in from a different server-

OK, so this just started last week - Whenever we try to connect to our server via ssh (we use sftp, as well) - The connection times out. However, when you ssh to any other server and then ssh ...
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1answer
4k views

very slow connection to ssh server from client (but not other servers)

I have an Ubuntu 12.04 laptop that is taking so long to connect to various servers (in different data centres) that it seems like a bit of a lottery whether I'll actually get a connection. If I ...
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0answers
328 views

Django + Apache WSGI + pscopg2 + PostgreSQL 9.1 unexpected EOF on client connection

There are two servers I have. One is SQL server, other is Django project server. And sometimes I get too many unexpected EOF on client connection error by postgresql and OperationalError: could not ...
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2answers
118 views

Linux Centos 6 becomes unavailable from time to time - OS&network issue

I am encountering following problem. There is one server (DL160 G5) running Centos 6.3 with default kernel 2.6.32-220.2.1.el6.x86_64 - at this point I'd like to add that issue appeared also at older ...
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0answers
571 views

Apache2 mod_proxy_fcgi closes a connection after each request

I set up mod_proxy_fcgi do go with apache and php-fpm. If I read the FCGI spec correctly, the typical flow for the communication between a server is to keep the connections between the web server and ...
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1answer
77 views

'Proxy' a connection

I'm developing an application A that connects to remote server S on some port (>1024). For security reasons the server S only allows connections from a specific machine I with a white-listen ...
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0answers
2k views

VmWare Host connection keeps on breaking

I have installed VMware ESXi 5.1 and configured the static IP. When I try to connect to the host using the vSphere Client it logs in sucessfully. But after that when I try to access any thing I get ...
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3answers
31k views

How to to avoid “Port 22: Connection refused” error on SSH port (22)?

I have a server where I just use openssh, openvpn and rabbitmq (which requires a lot of erlang dependencies). Every time I reboot my server I can't access to it anymore getting Port 22: ...
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0answers
2k views

SQL Server 2008 R2 Express connection error

Hi I'm having issues with SQL connection for a client PC We have software that uses SQL database, and I have just updated from SQL2005 to SQL2008 We have 5 pcs: 2 x vista (32 bit) 2 x win7 (64bit) ...
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1answer
6k views

How do I add a MySQL super user with root-like permissions?

Using PhpMyAdmin on XAMPP, I want to add a super user that has the same privileges as 'root'@'localhost'. This is because I want to create a MySQL instance that my local machine will serve as a ...
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1answer
944 views

Router drops connection

We are having trouble with our Draytek router, and I thought this would be the best place to ask. Our current set-up: Cisco EPC3925 modem to our connection point Draytek Vigor2850 router connected ...
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1answer
4k views

Connecting to MySQL & MS-SQL yields “Access denied for user” error message

I am trying to connect to both of my database servers, however when using some interfaces (web and some apps), I get the error message: Connection cannot be established with database. Authentication ...
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1answer
760 views

SSH connection closed/dropped a few seconds after successful log in (EC2/linux/debian)

I have been using ssh to connect to the same EC2 instance for months. Now, all of a sudden, I am getting kicked off the server every time I try to do so. The amount of time I can remain connected ...
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0answers
2k views

VMWare ESXi 5.0 Networking Issue

I have an issue with 2 new ESXi hosts. OS - ESXi5.0 Custom Dell ISO patched up to Build 1024429 DELL R820 with 1G network 2 ports from integrated MB NIC(Intel) connected to 2 juniper switches, one is ...
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2answers
319 views

mx gmail.com accept and rejects? [closed]

can somebody explain such behavior of gmail? root@mx0:# telnet gmail-smtp-in.l.google.com 25 Trying 173.194.71.26... Connected to gmail-smtp-in.l.google.com. Escape character is '^]'. 220 ...
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2answers
2k views

Creating shared folder between to servers

I need to create an SQL log shipping between 2 databases, The source is on an AWS EC2 instance running Windows Server 2008 R2 and SQL Server 2008 The destination is on an Azure VM running Windows ...
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1answer
865 views

Unix socket connection limit

This may appear like an already discussed/answered question. But I am specifically looking for info which I couldn't find anywhere answered clearly. I have an Nginx + php-fpm setup which uses unix ...
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1answer
3k views

How can i find out why my web server is refusing traffic from my web proxy?

I have a bit of an odd problem that I can't seem to figure out. I will preface this question with the fact that this exact setup was working just fine, and for some reason has stopped working ...
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1answer
6k views

Newbie, need help deciphering firewall log files (Cisco ASA 5520)

I'm not very familiar with firewall log files, or many of the terms involved in server connections. The lines in question involve a foreign, unauthorized IP interacting with a firewall (Cisco ASA ...
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1answer
9k views

Specific FTP connections not able to upload files

I have installed vsftpd in a server. A new ftp group was added and a user was created and added to that group. I've tested 3 different scenarios, only 1 of them is working properly and the other 2 ...
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1answer
1k views

RDP connection works but actual internet browsing not [closed]

basically I got Windows 7 dedicated server and Remote Desktop Connection to it works, while actually browsing internet doesn't (pinging, internet explorer). The details I've been given from host ...
2
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2answers
506 views

Are the number of concurrent tcp-connections a limiting factor for load balancers?

I am trying to understand if the number of concurrent tcp-connections on a load balancer is a limiting factor for a "normal" web site, rather than the data throughput. When I look at data sheets for ...
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2answers
99 views

Reverse-back ssh

I have a workstation and I need to connect to a remote server via ssh. Server is under Solaris 11. I can connect to remote server, but when I try to ssh back from remote server to my workstation, I ...
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1answer
490 views

Can't connect to my own machine through public IP

I couldn't figure out why I can't make a connection through my public IP. When using a local IP it works. I have the proper firewall port exceptions, and my router NAT has the configurations for port ...
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1answer
105 views

Why can't we contact a specific address range from inside our LAN?

We can't connect to a specific external server from inside our LAN. However we can connect to the same server from outside our LAN, at home, or using a mobile phone. It was working just fine for ...
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2answers
2k views

TCP vs UDP Error-Checking

I've bounced upon two articles that describe in-depth on how TCP and UDP connections work. However there is some kind of inconsistency. Where one article tells me that UDP does no Error-Checking at ...
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1answer
345 views

Browser prematurely closes connection

I am working on a legacy system where an intermittent problem keeps happening at what seems to be times where there is a lot of load on the network. I am using IE6 to access a webpage generated by a ...
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0answers
275 views

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
393 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 ...
3
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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
162 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
92 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 ...
0
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1answer
567 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
133 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 ...
2
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1answer
232 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 ...