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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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
125 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
206 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
4k 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
268 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
35k 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 ...
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1answer
458 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
3k 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
5k 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
5k 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
273 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
3k 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
793 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
107 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
1k 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
136 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
108 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
330 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
167 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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3answers
118 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
4k 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
77 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
296 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
184 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
874 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
1k 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
70 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
455 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
89 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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1answer
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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2answers
86 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
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 ...
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1answer
76 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
270 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
10k 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
400 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
81 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 ...
6
votes
1answer
994 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
63 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 ...
0
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1answer
617 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 ...
2
votes
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
7k 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
172 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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votes
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 ...