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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23 views

PLC actively refusing connection

I have a problem building a TCP connection between a PC a PLC. In short words: The PLC is waiting for connection attempts of the PC. The PLC has a static IP and two Ports (3011 and 3021) I can ...
4
votes
1answer
9k 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. ...
0
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0answers
17 views

Does nginx consider a page request as one request or more (including static files)?

Lets say we have a configuration as below: http { limit_conn_zone $binary_remote_addr zone=conn_limit1:12m; limit_conn_zone $server_name zone=conn_limit2:24m; [...] server ...
3
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1answer
2k views

Siege: descriptor table full sock.c:119: Too many open files

I am trying to make a stress test in my own server using siege with the following command: $ siege -c 500 myweb.com/somefile.php But I get this error: [error] descriptor table full sock.c:119: Too ...
1
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2answers
279 views

better alternative for tcp_syncookies in linux

In an effort to prevent DDOS attacks I followed suggestions to leave /proc/sys/net/ipv4/tcp_syncookies value set to 1 in my linux box to enable TCP syncookies. However, when I look at this URL: ...
0
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2answers
2k views

Connection Refused When Trying To Connect To IRCd-Hybrid

I have a Rackspace server running Ubuntu Lucid Lynx, where I have installed an IRCd-Hybrid. I can connect to the IRC server using irssi that was installed on the same machine where the server is, but ...
0
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1answer
1k views

Weblogic JDBC connection pool keeps in suspended state when DB is back to normal

We have a JDBC connection pool on a weblogic 12c. When the backend database goes to offline, the pool goes into suspended state, and when the db is back online after a short period of time (say 5 ...
1
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1answer
23 views

Nginx Stress Test with httperf - Large Data Transfer Differences from Apache Server

I'm running a simple httperf stress test on a quad-core Nginx server, pointed at an HTML/PHP document. Large connection rates quickly begin experiencing high connection and response times (see the ...
0
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2answers
272 views

Backup NAS to another NAS?

is there a way to backup / transfer a NAS (it's like a big harddrive with some access to a webinterface, but closed linux etc.... only two ethernet ports) to another one? or is the only way to connect ...
1
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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 ...
1
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2answers
3k 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 ...
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1answer
37 views

What is the difference criterion between max_clients and max_conns? [closed]

I'm new to server administration; What are the main \ Criterial differences between max_connections and max_clients a server can handle? It can be sound very similar,
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2answers
2k views

No Ping/Telnet connection between VM

I am new in Azure and have one problem which I can not solve. I tried asking on StackOverflow, but - quoting - "You will have better luck asking on ServerFault". I want several Virtual Machines to ...
7
votes
6answers
57k views

SQL - an error occurred during the pre-login handshake

Until yesterday evening, I was able to connect to my server from my local machine. Now, I get the following error: A connection was successfully established with the server, but then an error ...
1
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1answer
50 views

How to stop tinyproxy from using “Proxy-Connection” header

I just setup tinyproxy for the first time, and I'm trying to make it mimic a normal connection as closely as possible. I already disabled the Via header, but I'm not sure how to change the ...
0
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0answers
38 views

Apache times out unexpectedly ( despite setting Timeout in httpd.conf )

I've a PHP script (on centos, apache 2.2, php 5.4 & apache-mod-php5) that its execution takes about 2 minutes, but 1 minute after sending request, my connection to apache server times out and ...
0
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1answer
26 views

How to change MySQL user permission temporarily (Per Connection)

I do not know if it is possible at all or not. What I want is that, when a certain connection is established, the user not be able to modify data with that connection. This is the scenario: ...
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3answers
1k 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 ...
0
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1answer
33 views

Increment CouchDB concurrent connections

I'm using CouchDB to serve thousands of requests per second. When under heavy load, it seems to respond slowly so I began to ran tests with apache bench. Couch can respond 50k requests, 1k concurrent. ...
0
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0answers
355 views

Rails app with nginx passenger: recv() failed (104: Connection reset by peer) while sending to client

Update. June 8 It's most definitely client-side. Something about JQuery/Ajax/Facebox doesn't sit well with IE10/11. Unfortunately updating all the components for JS related things to be more ...
0
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2answers
45 views

Using a specific network adapter for a service

On a Synology NAS this is called: Service-interface binding Is there something to specify the network adapter used by a certain service? I don't wan't all applications running on that adapter. I only ...
2
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0answers
63 views

Website inaccessible until host is pinged from client (on a class A subnet)

There is this really weird issue on the internal network, this happens constantly to "random" machines. Machine (client) boots up, goes to ...
0
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0answers
53 views

SQL Server 2008 R2 eventually sends RST instead of FIN/ACK

My SQL Server 2008 R2, running on Windows Server 2012 R2 unexpectedly sends connection resets (RST packets) to its clients performing series of small queries. The problem is, it eventually happens. ...
0
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0answers
9 views

debug connection to other server

My server suddently is unable to connect to other servers through Curl, file_get_contents etc. This issue is reported for at least 5 different server Ips. Whereas it still works with many others. ...
4
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1answer
453 views

Why are connections in FIN_WAIT2 state not closed by the Linux kernel?

I have an issue in a long-lived process called kube-proxy being part of Kubernetes. The problem is that from time to time a connection is left in FIN_WAIT2 state. $ sudo netstat -tpn | grep ...
3
votes
1answer
111 views

ssh on Ubuntu fails after first time : Asymmetric routes, SSH connection fails to properly establish

I have been baffled by this problem... I have an exs host on subnet 10.128.0.1 and guests on 10.128.20.1 subnet. I have another box on 10.128.0.1 subnet with vms on 10.129.18.1 ... Router is simple ...
0
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1answer
37 views

Connect remotely to Database by SoftEther VPN Client

As i have just started studying about Softether VPN, i have some questions : I want to work at home, and I installed SoftEther Server at my company, and SoftEther Client at home, I successfully ...
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1answer
17 views

How to handle localized connectivity issues between web services

Our web application uses various web services, most of which are not managed by us, but by an external service provider (e.g. Auth0 is one of those services). Recently, our application failed ...
2
votes
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 ...
2
votes
0answers
64 views

HTTP DELETE timeout between Nginx and Application

We're facing a really weird error using HTTP DELETE, the symptom is occasionally the user gets a 504 (timeout) error in the browser. The requests flow through the steps described below: Browser -> ...
0
votes
2answers
1k views

Windows Server 2008 dropping connections [closed]

Possible quite similar to this post but I wonder if someone can help me with this issue. Home Server specs: Windows Server 2008 Standard (Non-R2) 2 NICs, external one(Realtek) has a firewall on it. ...
0
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0answers
55 views

Limit nginx' simultaneous connections to an upstream server

My setup consists of an nginx server and a Node.js upstream server. How can I limit the number of connections between nginx and the upstream server? The intended behavior is: nginx keeps exactly n ...
1
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2answers
27 views

Apache2: How to track client download progress on server side

I'm running an Apache2 on Ubuntu Server. A client downloads a large file (appx. 2GB) from that server using a browser. How do I track the progress of that download on server-side. I'd like to see how ...
19
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6answers
26k 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 ...
0
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0answers
317 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 ...
0
votes
1answer
445 views

Nodejs: server doesn't close TCP connections

Facing a problem in the production server running debian (7.0) with nodejs (v0.10.x) cluster where it doesn't close some TCP connections to the clients. This leads to connection drops when connection ...
1
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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 ...
0
votes
1answer
2k views

Zabbix Cannot Get Value From Agent [closed]

I am attempting to connect Zabbix to a host and am getting the error: Get value from agent failed: cannot connect to [[xxx.xxx.xxx.xxx]:10050]: [4] Interrupted system call I am not sure why this ...
1
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2answers
6k views

How to enable `Keep Alive` in a shared hosting environment?

I have only acces to the php.ini file and my good old .htaccess file. Where do I enable the Keep Alive setting? ( Im on a plesk 8.2 )
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votes
1answer
50 views

Commercial Dedicated vs Shared Residential Internet [duplicate]

I recently purchased a server to mess around with. I want to be able to host a few of my own sites, but my home internet is about 5Mbps up and down. I was looking into colo at my local DC and they are ...
0
votes
0answers
67 views

“Connection timed out” on Debian jessie after some successful tries

I have a root server hosted at Hetzner. After upgrading the server to debian jessie I experience connectivity problems. After connecting successfully to the server for 2 to 5 times it stops answering ...
0
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3answers
3k views

pptp vpn - Kill User Connection

I'd like to be able to terminate a user's connection to my pptp server from the server itself without interrupting anyone else's connection. Problem is - I have no idea how and have found no useful ...
1
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2answers
3k views

IIS Connection String not being inherited

I have an issue where I've set up a connection string at the Machine level in IIS, and it is inherited all the way down as expected... EXCEPT for the application I want to use the string in. Other ...
0
votes
3answers
24k 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: ...
1
vote
1answer
423 views

How Do I Limit the Number of Simultaneous Connections to a Network Share?

Is there some mechanism to actively refuse connections to a network share in a Windows domain environment by using some predefined conditions on the server that hosts the share (if possible)? Let's ...
0
votes
0answers
239 views

Banned from SSH Centos server but can't find where

For some reason my ip address is banned from using ssh or sftp. I have no problem connecting to the server using an other ip nor i have problems reaching all other services (like http, teamspeak) with ...
7
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2answers
3k 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? ...
1
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4answers
131 views

Multi RDP connections as an Admin to the domain controller

We have a 2008 r2 server that's everything in one. It's a domain controller plus it runs some applications. I know it's a not a good design but it is what it is. Since it's a domain controller, it ...
0
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1answer
42 views

Extremely flaky connection to our EC2 instance through one connection, but not others

We have a robotic coffee barista deployed at the Dell campus in North Austin, with internet service through Time Warner Cable. We have been fighting intermittent connection losses between 10PM - 1AM ...
1
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0answers
31 views

mysql-cli - force quit on timeout / connection drop

I have set timeouts in /etc/profile.d/ to disconnect inactive users using TMOUT and this works great however now I am seeing users just holding their connection open by keeping some foreground process ...