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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suggest a tool similar to tcpview

Can anyone suggest a tool for Windows similar to Sysinternals' tcpview which monitor current all connections and also counts and shows traffic/speed?
3
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1answer
4k views

PPTP connection fails with errors 800/806

I've got a client (Server 2008 R2) that won't connect to our production environment PPTP VPN server (Server 2003, running RRAS). The server is behind a firewall that has TCP1723 open as well as GRE. ...
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3answers
510 views

Why cannot connect to SQL Server by the full server name with instance name?

For some reasons, I cannot connect to my SQL Server with full name + instance name (e.g. server_name\MSSQLSERVER) by SMSS. However, I can connect by simply using just server_name or localhost. When I ...
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3answers
979 views

Ping host computer from installed Ubuntu on virtual box

I have installed Ubuntu 11.10 on Virtualbox 4.1.8. My own OS is Windows7 x64. I need having a connection between these operation systems, but there are many choices. NAT, bridge, Host-Only, etc. I ...
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2answers
345 views

TCP what's the purpose of the third step of 3-way-handshake [duplicate]

Possible Duplicate: Why is it 3-way-handshake and not more? Example: If a client wants to talk to a server, it just tells the server that it wants to establish a connection, then the server ...
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1answer
590 views

Slow connection times from remote server doing apache bench

I am trying to measure perfornace on nginx with ab. Doing the same ab from the local machine gives me about 10 times the requests per second as from a remote machine that is located on the same ...
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1answer
121 views

Linux network adapter keeps changing settings

I'm running CentOS 5 and noticed for the past week that eth0 settings keep changing and I have to reset them. Any ideas what it might be or where I need to start?
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0answers
106 views

Setting the connection timeout in virtuoso server via connection string

I started the virtuoso service on windows with the following configurations (this is the important part of the config file): ResultSetMaxRows = 10000 MaxQueryCostEstimationTime = 40000 ; ...
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2answers
186 views

Reflect SVN server to /var/www/ directory & 2 other questions

Question 1: I'm setting up a SVN server on for development, how do I serve the files from the /var/www/ which is my root of my website which I'd like to manage the files via SVN that would reflect ...
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4answers
170 views

More important ping or hardware [closed]

I am not an expert so I would ask to you please. We are looking for a dedicated server for minecraft for our community, we have two options: 1. Intel® Core™ i7-2600 Quadcore 3.40GHz incl. ...
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2answers
424 views

Mysql blocked my webserver max_connect_error reached [closed]

Last week end, one of my two webservers was blocked by mysql server. The result is all requests on that blocked webserver show a taylored error page. I'm thinking to implement a script to prevent ...
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1answer
82 views

Accessing database from local network

I would like to access database running on virtual machine which resides in server connected to local network. Here's the whole situation: There is Windows Server 2008 R2 Datacenter running as ...
3
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2answers
585 views

Tracking down “Connection reset” errors in Linux

I'm handling large numbers of concurrent downloads (approx. 500 per server) using Java. All the files are being downloaded from Amazon S3, and the downloading server is an EC2 m1.large instance. ...
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2answers
3k views

How to check fiber connectivity in ESXi 5.0?

On a VMware ESXi 5.0 host, how can I check if fiber storage adapters are properly connected to the fiber switch/SAN, i.e. if the fiber link is up?
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1answer
133 views

Is a retransmitted SYN *EXACTLY* the same as the original?

If I have a client trying to connect to a TCP server, and the client sends a couple of retransmits trying to establish a connection, is there ANY difference in the SYNs it will send? If the server ...
5
votes
2answers
2k views

apache webserver unresponsible with server-status showing all child processes waiting for connection

My setup: i have 3 nearly identical webserver machines serving the same high loaded dynamic website with simple load balancing over dns. The service has been working for over two ears with the same ...
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1answer
2k views

Strange Jmeter connection refuse on Tomcat

I tried difference setting in Jmeter and Tomcat. If the Threads number in JMeter is 1~200, Then tomcat is okay. If It is 300, Then after serving few requests, tomcat starts to output errors. Here ...
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2answers
95 views

Keeping connections open

I'm new to cURL and I'm trying to do something reasonably simple. I want to login to a server and download data at regular intervals over a few hours. First, I login to the server - which I've ...
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0answers
38 views

Troubleshooting poor connectivity to one server but not to another

We have 2 servers that I use to store files on. I have excellent connectivity to one of them, but terrible connectivity to the other. For example, if I attempt to open a decent size (~4.5MB) excel ...
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1answer
1k views

Finding short-lived TCP connections owner process

Running tcpdump on local connections to an apache server, I found TCP connections being established and closed immediately every 2 seconds. How do I find which process is responsible for these? ...
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2answers
177 views

Connecting to a Server with Laptops

We have a small office with 7 staff that work in it. We have recently got hold of a server in the bid to keep office work separate to private work. What is the best way for the laptops to connect to ...
-1
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2answers
381 views

Can't connect to SQL Server instance through my app but I can with SqlCmd [closed]

I can't connect my VB app to an SQL Server 2005 instance because "server don't exist or access has been denied" (the Conection String is correct because the app works in other networks and also i ...
2
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3answers
687 views

DDOS Deflate Safe Connection Limit?

I work for a site that often gets attacked by bot networks. We have started to use this tool: http://deflate.medialayer.com/ which auto-bans IPs that have more open connections than the set value. By ...
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6answers
637 views

Effect of distance from server on page load speed

I measured the load speed of a static image file severed by nginx from my server (using pingdom service). The server should normally process this request within few seconds. My server is located in ...
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3answers
580 views

MySql: can connect normally to local db, can connect via TCP remotely, but cannot connect via TCP locally

Host A is running a mysql server. On A, I can connect to the db: hostA: mysql -p I have allowed user X from host B to connect. I am able to connect via this: hostB: mysql -h A --protocol=TCP -p -u ...
0
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1answer
161 views

If linux server is connected to router, internet connection for the whole network will not work

I have a machine (Fedora) which is using iptables (acting as firewall). The system worked a long time, but now there is a problem. The internet connection was failing. I looked through and found out ...
3
votes
1answer
4k views

Failed to connect to MySQL at localhost

I recently installed MySQL on my machine using MySQL installer. I am using it as part of an Apache Tomcat server I'm running on localhost. I linked the database to Netbeans and everything was ...
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2answers
422 views

SSH occasionally (rarely) doesn't connect

I've been running this script for a few days: while [ true ]; do ssh USER@SERVER echo -n . || date +"%s"; done Obviously, my terminal is filled with dots, but sometimes (quite rarely) I get this ...
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1answer
69 views

Accessing a connected device through LAN [closed]

I have a metered APC Power Distribution Unit (PDU) which is capable of spewing out the current load, power and such information through a LAN cable. I'm connecting the cable from the PDU to a server ...
0
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1answer
118 views

How can I debug a hanging ssh connection?

I have two virtual servers with the same host provider. After regenerating my SSH keys on my client machine (local) I con only connect to one of the virtual servers. When I connect to the other (both ...
2
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1answer
1k views

Is it possible to see active connections in nginx?

Is it possible to see what URLs are actively being served by nginx (i.e., see the URLs that are in the middle of being responded to, not the ones that nginx has finished responding to). I would like ...
8
votes
6answers
12k views

How to force MySQL to connect by TCP instead of a Unix socket?

I would like to analyze mysql traffic. Right now, all mysql requests are sent to the MySQL unix socket: unix 2 [ ACC ] STREAM LISTENING 3734388 15304/mysqld ...
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1answer
1k views

What is responsible for Connect/Send/Wait in a HTTP request?

Services like pingdom and Google speed analyze the time consumed for reading a HTTP file. This includes DNS: Obviously, DNS management to interpret the namespaces is responsible. Connect: ??? Send: ...
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2answers
181 views

ADODB Connection - Webserver doesn't resolve the hostname of the mssql server

I have a mssql connection resource file as belows: <% Set Conn01 = Server.CreateObject ("ADODB.Connection") Conn01.Open "PROVIDER=SQLOLEDB; Data ...
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0answers
524 views

apache as proxy server ftp request connection times out for certain connections

I have setup my apache to act as proxy server by configuring it as: [server]# cat /etc/apache2/httpd.conf Listen 10.2.28.56:8787 ProxyRequests on <Proxy *> Order deny,allow Deny from ...
4
votes
1answer
915 views

IPtables rate-limit, What are the differences between modules? Recent, Limit

I am doing some rate-limiting with IPtables, and i'm not sure if I should use "Recent" or "Limit" What are the differences between the two? If they both achieve the same result, which one has ...
2
votes
1answer
9k views

Unable to connect to remote host: Connection timed out when trying to telnet to MySQL?

When trying to connect to mysql server via telnet I am getting following error: telnet localhost 3306 Trying ::1... Trying 127.0.0.1... telnet: Unable to connect to remote host: Connection timed out ...
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2answers
7k views

tcptrack shows SYN_SENT connections, does that mean the SYN package reached the server?

our server suffered a serious connection timeout problem, so we track tcp connection with tcptrack we found out that, if the client started to connect to the server, tcptrack shows the connection, ...
0
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1answer
537 views

Can not see drive in Remote Desktop Connection

I did an upgrade from Windows XP to Windows 7. Since I did that I can not see my drive. Of course I set the local ressources settings and the remote settings. The operating system on my server is ...
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1answer
262 views

Maximum Concurrent Connection of MySQL server?

For the following hardware specification, how can I estimate the maximum concurrent connection of MySQL server? Intel Xeon E5620 2.4GHz 12MB L3 Cache 1066MHz 4GB x 3 1333MHz DDR3 ECC RAM 300GB SAS ...
0
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1answer
483 views

Firefox users getting intermittent Connection Reset errors when downloading Zip files

I've got a site running on IIS7. Intermittently, Firefox users will get 0k files, as a result of a "Connection Reset", when downloading large zip files. Usually these are in the range of 70-100MB in ...
6
votes
2answers
2k views

Impact of Connection Close vs Keep-alive

I'm configuring our servers, and due to the nature of our load balancer, we can't send connection keep-alive headers. I'm trying to determine the impact of sending these headers to both the end-user ...
1
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1answer
411 views

Ubuntu custom server after some time: Connection reset by peer

I have a linux server program. I notice that after 2 or 3 days some time, the server stops responding. When I look into the server log, I find "connection reset by peer" messages. I have to restart ...
2
votes
2answers
576 views

SAS drive to SAS/SATA backplane then SATA cables to SAS/SATA RAID card?

I just got a Supermicro chasis: http://www.newegg.com/Product/Product.aspx?Item=N82E16816101241 That has a backplane that supports SAS and SATA drives but the backplane has SATA ports to be ...
0
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1answer
102 views

Server can only make outbound connections

My server is running Ubuntu 10.04 and is connected by ethernet to a router/modem device. The problem is that it's basically ignoring incoming connections. So I can't SSH into it or access the ...
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2answers
197 views

Intel Server Board: Ethernet MT connection vs PM connection

What's the difference between an MT ethernet connection and a PM ethernet connection? Intel server board has two ethernet ports that are named in that manner.
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1answer
31 views

Problems when connecting to a SQL Server 2000 when the name has a trailing space [closed]

We have two application servers that a configured quite similarly, however there is a discrepancy between them when they attempt to connect to a server name with a space appended to the end. So, for ...
0
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1answer
153 views

Postfix connection cache / address verification probes

Is Postfix connection cache also applicable for address verification probes? My setup of 2 frontends with 1 backend sometimes runs into trouble under high load. Frontends verify recipients on the ...
2
votes
2answers
377 views

SSH Connection Lost

I have recently started using iptables, and I executed iptables -F without knowledge of what it might do. And suddenly I have lost connection to the node. I can't even ping the node. Any help would be ...
0
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3answers
121 views

Establish Linux to Windows connection [closed]

We can establish connection between Unix based machines using these commands - ssh telnet but how to establish a connection between a Linux and Windows? Putty, WinSCP etc are used in Windows to ...