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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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 ...
3
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1answer
5k 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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1answer
548 views

Apache Server status, is this a bad sign?

I've been monitoring my Apache Status lately, and a lot of my users are saying how slow the site is to respond. Here is the Apache Status: Current Time: Tuesday, 21-Jun-2011 20:58:45 EDT Restart ...
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1answer
225 views

Is there any restriction of new incoming/outgoing TCP connections/seconds in Windows?

Is there any restriction of number of new incoming/outgoing TCP connections/seconds in Windows? If so, are there any differences between Windows versions?
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1answer
210 views

remote connection to SQL Server 2008 R2 failed from another country?

I am getting this error message when I try to connect SQL Server 2008 R2 Server Instance Conditions : On the server side : Sql Server Network Configuration : TCP/IP enabled Sql ...
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1answer
117 views

secure L2 connection

Due to some rapid changes I need to also provide vlan(s) in a new location. The topology looks like this: (main location, vlans:id=6(workstations),id=8(phones)) | my_switch01 \ \ ...
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1answer
217 views

Ubuntu networking issue: two specific machines cannot browse web while connected to network at the same time

I have setup a secure wireless network which works very well except for two laptops running Ubuntu 10.10 that can't access the Internet via a browser at the same time. They can both ping sites, wget ...
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1answer
485 views

Can ping, can establish SSH connection in one way but not on other way

First of all, sorry about my english. We're facing a very strange problem with SSH connection between two specific servers. Let's say we have X1, X2 and Y servers. Where X1 and X2 are behind the ...
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1answer
395 views

Net Screen Remote RDP not working but vpn is

I have a problem regarding a connection with Netscreen-remote. First of all, to install the program I had to create a VM of XP x32b because of compatibility issues. Once it is installed, I imported ...
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1answer
267 views

How to limit SMTP delivery to hourly batches

Moved over from StackOverflow. Sorry if you saw it there first In an effort to keep us from being labeled spammers by major ISPs (in addition to SPF records, privacy policies, CANSPAM compliance and ...
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1answer
90 views

Windows Server 2003 Synchronize Not Sticking

We have a Windows Server 2003. It had Raid running on 2 disks. One disk failed and the Raid Controller failed. We replaced the disk and controller and restored everything. No data was lost. The users ...
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1answer
71 views

Mysterious Upstream Client ::ffff:81.70.140.65…changes on each error

I read the following post: nginx errors recv failed 104 ...but have a different question... I'm curious to know why there is ANY reference to this mysterious upstream source: ::ffff:81.70.140.65 ...
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93 views

TCP connection stuck in SYN_RECV state despite ACK received

My client and server are both internal machines. tcpdump on both client and server show all three parts of handshake are communicated, however netstat on server shows SYN_RECV, and on client shows ...
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414 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 ...
2
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0answers
128 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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56 views

Amazon AWS connection issues

I have a strange issue with my Amazon EC2 instance. I have created the following: m3.medium instance hosted in the Amazon cloud This instance runs the following a. Apache Tomcat application server ...
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0answers
265 views

Apache2 mod_proxy_fcgi closes a connection after each request

I set up mod_proxy_fcgi do go with apache and php-fpm. If I read the FCGI spec correctly, the typical flow for the communication between a server is to keep the connections between the web server and ...
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699 views

VmWare Host connection keeps on breaking

I have installed VMware ESXi 5.1 and configured the static IP. When I try to connect to the host using the vSphere Client it logs in sucessfully. But after that when I try to access any thing I get ...
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1k views

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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585 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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174 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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857 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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245 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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7k views

Cannot telnet to SQL Server on port 1433

I've been working solidly on this issue for the past three weeks. I cannot seem to find where the actual issue is. I just recently found this article on how to troubleshoot the connection. I made it ...
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548 views

java.net.ConnectException: Connection timed out, Tomcat 7 and iptables

I am experiencing a weird problem.. Basically our Java developer said that in the java application the services that access the db to write on it get this error: java.net.ConnectException: ...
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50 views

VPN Network intermittantly fails to provide internet: What could be possible causes

We have a small office with our own VPN setup. We occasionally experience failures in our internet connection where we cannot access the internet. Most of the time the internet connection will resume ...
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565 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 ...
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436 views

Switched Oracle to use Shared Servers, now Java app throws SQLRecoverableExceptions

This issue might blur the line between Java and database problem, so I apologize if this is the wrong place for it. Not sure which side is to blame yet. I'm a Java developer temporarily playing DBA ...
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456 views

Load balancer unable to contact a server through http

In our infrastructure we have a load balancer(apache mod_balancer) and three backend servers that run apache as a web service and iptables as firewall, Lately ONE of them is giving a lot of " ...
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17 views

mod_jk losing connection with tomcat

I'm running an Apache tomcat + mod_jk 1.2.40 behind an apache web server. Everything has been setup and works properly for some amount of time since a tomcat startup (measurable in days/weeks); then ...
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44 views

Cannot connect to TCP service from remote host

I have two servers running RHEL 5.8. SRV1 (10.58.192.36) has a service running on port 9002 and I need to connect to this service from SRV2 (10.58.192.42). [root@SRV1 ~]# netstat -anp | grep 9002 tcp ...
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57 views

Connectivity issues (slow response) to a remote VM via SSH

I am on a linux machine trying to Ssh into a remote Centos 6.4 server via VPN. The server often gets disconnected and response too is slow. I see the messages on the terminal once in a while: ...
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36 views

jboss 7 connection to database vip fail

Jboss 7 is connecting to HA database with VIP. When master db fails, the HA kicks in and slave db takes over as master. Querying directly the new master db works fine. However, at Jboss level, the ...
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7 views

Connect to Cube without using Windows account

Is it possible to connect to OLAP Cube (SQL Server) without using Windows account. Currently, I need to be on the same domain in order to connect to a cube. Are there any other solutions?
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554 views

ssh_exchange_identification: read: Operation timed out

I am trying to connect to my server (Synology DS212) using ssh xxx@yyy -p 22222 -vvv but I can't and I obtain the following error: OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011 debug1: Reading ...
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180 views

OpenVPN - Http proxy - connection reset

I am dealing with a problem in OpenVPN (I think so) and maybe someone can help to sort it out. I am connecting to the internet through a HTTP proxy server (10.0.0.1:8080). As I set manual ...
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200 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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38 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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62 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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22 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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45 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 ...
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0answers
87 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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103 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 ...
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0answers
205 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 ...
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0answers
39 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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159 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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85 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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0answers
70 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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265 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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20 views

connection via ip fails but can be established using hostname

I cannot reach the Server using the IP-Adress, but if I use the FQDN or the hostname itself, the connection can be established. The connection should be established by the ...