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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Haproxy backend servers on different interfaces

I have a haproxy server which gets limited to some 60k connections. I think it is because of ephemeral port limit as I have 1:1 connection mapping, so all my outgoing connections go to the same ...
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0answers
11 views

Connection Reset by Peer error with Apache and JBoss 7.1.1

We are seeing errors on some of our QA testing scripts that intermittently throw Connection Reset By Peer errors. The Test scripts submit requests via F5 which forwards requests to Apache (2.2.21) ...
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2answers
58 views

Cant ssh to my public ip [duplicate]

I have been able to log on to my dev box (which is in my home network) for a while now, using ssh username@publicip however recently this has become impossible due to the following error ...
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0answers
12 views

Various hang-ups on Plesk 12 / debian squeeze system

I am experiencing strange system hang-ups. apache2 reacts in such a way that out of 5 requests, usually about 1 of those will simply take ages for the server to respond to, or it will simply vanish ...
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1answer
36 views

Sometimes my http server does not respond and I see errors like connection reset or timout

Here is the graph from munin that might help and also here is my http.conf: <IfModule prefork.c> StartServers 8 MinSpareServers 5 MaxSpareServers 40 ServerLimit 2048 ...
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1answer
28 views

Users unable to connect due to an unknown plausible reason [closed]

========================= Warning: Long thread; includes a lot of information to give you some basic understanding of my issues. If you rather not read it, then here are my questions: 1) Does Linux ...
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1answer
53 views

Unable to use Remote Desktop connect to Windows server 2003 by Terminal Services

I have a system composed with few windows servers 2003 R2, one is built as the domain controller another one as a web server. I tried to remotely log on the domain controller with a wyse thin client ...
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0answers
31 views

Why is my server so slow to accept connections?

I've noticed that my server seems to be very slow to accept connections - i.e. when analyzing the load time using the Chrome event map, it shows that some tasks can spend multiple seconds waiting for ...
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0answers
26 views

How can I queue a script to run the next time a system is up and connected to the internet? [migrated]

I'm using mailsend (on a Mac) to send mail from the command line. I'd like to set this up such that I can execute a send command, but if my system is disconnected from the internet, that command is ...
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0answers
26 views

Network Issues Connection to SQL database on MS server

Prior to asking this question, I followed this thread: Cannot telnet to SQL Server on port 1433 I am attempting to connect to a database on a server distinct from the computer upon which I am ...
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0answers
19 views

CustomLog responds but there are no output on client

So my friend had a server that responds incorrectly, for example this request: time curl -vv 'http://x.x.x.x/~a/fsocial/json_eod_per_code/PTBA-2014-2-c.json' * Hostname was NOT found in DNS cache * ...
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2answers
109 views

php pdo connection cannot be established, but mysql command line client can

situation as follows: php script on server a, run by user 'web' (nginx + php-fpm) should access mysql on server b via pdo library, but gets SQLSTATE[HY000] [2003] Can't connect to MySQL server on ...
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41 views

SBS 2011 lost connectivity with router

We have to host with several virtual machines. (One SBS2011, two terminal server, a few w7, a few xp, few windows 2008r2). More than one times / day our SBS server lost connectivity with the router. ...
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0answers
32 views

Connectivity issue when computer is on certain ip range

I am using mobile USB stick for internet connectivity. My connection works just fine, but I cannot access my computer from outside (internet) when I am on certain IP range. When my mobile stick gets ...
0
votes
1answer
30 views

unable to connect to nginx hosted website from most pcs, yet my local pc connects fine?

i run a website (remotely) using nginx and php, which has been ok for a long while. i recently changed the domain name to a new name and now most web browsers/pcs are unable to connect to the website. ...
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0answers
15 views

Limit connection per domain source [duplicate]

I would like to limit my http request for only one virtualhost on apache, is it possible to do this via iptables for only one virtualhost ? I prefer to do not use apache if it's possible for better ...
0
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1answer
72 views

ssh_exchange_identification Can't Access to SSH Amazon EC2 (Lock Out)

I get an error in terminal when I'm trying to access my instance in Amazon EC2. I use Centos 6.x server WHM/cPanel, i have access to WHM, but i DON'T have a complete access to FTP or SSH. ssh: ...
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1answer
47 views

Link rate between EMC DAE and HBA

I have a EMC DAE (KTN-STL4) drive cage directly connecconnected to a HP Proliant server using a QLogic QLE2560 HBA. I'm using copper cable between the HBA card and the DAE. On the controller card in ...
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1answer
242 views

IIS 8.0 Second Website on port 81 not visible publicly

I have been given a VM in Windows Azure with Windows Server 2008 R2/ IIS 8.0 running. It has a default website. Now I wanted to create a dev version of that site at some other port, say 81. I added ...
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0answers
28 views

Can Apache Web Server handle up to 100,000 concurrent connections? [duplicate]

Is it possible to configure Apache Web Server to handle up to 100,000 or more concurrent connections? I know if this were to be possible, it's definitely going to be resource intensive. In that ...
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1answer
106 views

MySql - Lost /var/lib/mysql directory [closed]

So, the thing is that I was messing around with directories to backup and I delete the folder /var/lib/mysql and now i cant connect to my database gettin this error (I'm using plesk panel): ...
5
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1answer
383 views

Redis connection issue

We are currently experiencing a lot of Redis errors with the message Unable to connect: read error on connection, trying next server We run Redis on FreeBSD using PHP Redis and we have a hard ...
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1answer
264 views

Number of SSH connections rises, and blocks data?

We have a client server setup, where the client sets up an SSH tunnel and uses port forwarding to send data to the server: ssh -N -L 5000:localhost:5500 user@serveraddress The normal number of SSH ...
3
votes
1answer
304 views

BGINFO with MySQL for storing computer information

We are trying to set up BGinfo to record network computers' information in a centralized database. We intend to set up BGinfo to start up for all users and record logon and logoff time plus setting up ...
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1answer
52 views

Connecting two routers via serial

I'm new to Cisco and I wanted to connect two routers with serial connection. This is how my network looks now: Maybe I connected them wrong because when I try to ping from PC0 to either PC2 or PC3 ...
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1answer
54 views

Single computer cannot access servers

We have several servers running on our internal network. Our router's firewall has a redirect in place for some domains to these servers' ip addresses. This works nicely. However, we've run into a ...
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77 views

Connection is not persistent when using EVDO data card

I use a BSNL EVDO wireless data card. So, with this I cannot get my connection persistent i.e I cannot load Facebook, Gmail or Google search properly. If I enter a word and hit enter in Google search ...
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1answer
28 views

Only allow a specific client to talk to a server

I have the following situation: have a server (ubuntu) running an application. I have a client (only the one client) requesting stuff from that server. To execute the requests, the client has to ...
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votes
1answer
301 views

wget ftp connection failing after PASV command

In attempting to transfer all files from one web server ("source") to another ("destination"), the wget command is connecting via FTP, but cannnot proceed beyond the PASV command. I'm using an SSH ...
2
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3answers
107 views

Progressive video download in a classroom environment - how to determine bandwidth needed

Background: We need to deliver a video heavy e-learning course to a classroom of ~15 users. This video will be MP4 delivered via HTML5 video so progressive download. As from what I can gather you ...
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2answers
235 views

Connecting VoIP Phones to a Laptop

I'm trying to connect two VoIP phones to a laptop using the internal ethernet adapter and a usb-to-ethernet adapter. My configurations are as follows: Laptop eth0 - 121.1.2.1/24 Gateway - 121.1.2.4 ...
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votes
6answers
491 views

How can I find the total number of TCP connections for a given port and period of time by IP?

On a Linux system there are plenty of methods for listing the current TCP connections for a given port by connecting IP but: how can I count the total number of connections to a port per source IP for ...
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2answers
75 views

Hosting medium sized files - do I need a 1000mbps connection? [duplicate]

I am planning on setting up a free file hosting site where users can host files up to 1GB. I was looking at some dedicated server hosts and found one in the Netherlands that offers 50TB bandwidth per ...
5
votes
1answer
111 views

Odd TCP termination sequence

While troubleshooting another thing, I've noticed an odd pattern of TCP closes. Packets: http://www.cloudshark.org/captures/7590ec4e6bef What's happening is that the last few packets of the close ...
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1answer
527 views

Why would a client send a RST packet as reply to a SYN,ACK?

I have a HTTP webservice where sometimes the connection setup fails in a strange way: client sends a SYN packet server sends a SYN,ACK reply client responds with RST In which situations could a ...
0
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1answer
163 views

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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votes
1answer
73 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
57 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
138 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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votes
1answer
52 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 ...
2
votes
2answers
73 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 ...
0
votes
1answer
30 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 ...
0
votes
1answer
210 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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0answers
81 views

Establish an SSH Tunnel out from behind a firewall

I have a box sat behind a firewall, and when its powered on (or internet connection resumed), I want it to connect to a server, allowing me to do a reverse SSH connection back to it. I'm currently ...
1
vote
1answer
53 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 ...
3
votes
2answers
135 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
102 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 ...
0
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2answers
143 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
66 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 ...
0
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1answer
48 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 ...