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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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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45 views

Apache process 100% with IPV4 TCP 10u

Today i got strange http ussage. All apache processes woks ok but after some time i found few processes stocked at 100% and they are like that long time. After i checked that process id at webmin ...
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1answer
4k 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
866 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
712 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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1k 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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266 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
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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
761 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
2k 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 ...
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2answers
415 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
95 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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217 views

How configure Apache Virtual hosts to different IPs for outgoing connection?

I have a dedicated server with 4 IPs, Debian 7 amd64, Apache 2.2.22, PHP 5.4.4. I have configured 4 Virtualhosts, so that anyone of them listen only one IP. The problem is that all they using only one ...
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1answer
450 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
104 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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108 views

FreeBSD drops connection on file upload

Very strange error, first I thought it related to PHP settings or nginx (both have all proper settings up to 1G limits and all timeouts are properly set), but then I checked with Ruby (Sinatra), and ...
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2answers
1k 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
293 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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261 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
352 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
94 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
100 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 ...
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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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89 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
542 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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356 views

Ubuntu 12.10: wvdial connection shared through NAT resets and reconnect with every packet request

I'm having this problem: I'm sharing my wvdial modem connection through NAT configuration with these commands: $ sudo iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -o ppp0 -j MASQUERADE $ sudo ...
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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
225 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
5k 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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378 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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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 ...
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1answer
496 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
7k 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
7k 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
369 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
893 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
118 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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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
141 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. ...
0
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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
120 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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389 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
174 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 ...