Questions tagged [connections]
The connections tag has no usage guidance.
85
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Why is postfix rejecting one particular validly DNS-mapped sender?
I'm running postfix 3.5.18 under Debian 11. The mailserver is working fine for all senders except one.
I regularly am getting this message from emails from one sender and one sender only (where I ...
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0
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429
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HTTP/1.1 500 ERROR in Apache Tomcat 9.0.31
We're really looking forward to your advice on this topic.
This issue we face in an application, using Apache Tomcat release 9.0.31.
The HTTP/1.1 500 error message, we never saw it with Apache Tomcat ...
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0
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1
answer
292
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Routing all Traffic through a VPN Node while accepting incoming WAN Connections
I want to route all traffic through another VPN-Node, while:
Keep the Connection to the VPN-Server active (already works)
Still accepting WAN-Connections on that Client.
My Client Node Configuration:...
- 371
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591
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iptables hashlimit rate is not working as expected
I wrote the following firewall rule:
iptables -A INPUT -m hashlimit --hashlimit 1/hour --hashlimit-burst 3 --hashlimit-mode srcip,dstport --hashlimit-name ssh -j ACCEPT
I was expecting the burst to ...
- 15
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40
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Why does a MySQL select sometimes not create a "client connection"?
I'm doing some testing (on my dev server) to help me figure out what is causing the ever growing list of connections on my production server. My assumption is that there are certain pages that are ...
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9k
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How do I change MySQL wait_timeout in production environment at runtime?
I'm running Windows, IIS, MySQL, PHP.
In my.ini under [mysqld] the value for wait_timeout is set to 60.
wait_timeout = 60
But when I execute the following:
show variables like 'wait_timeout';
It ...
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178
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Is this a normal number of database connections?
Check out this graph of my database connections. I am running a Postgres database on Lightsail, and I am connecting to it from a single Ubuntu instance running a single instance of Express and ...
- 101
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319
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MySQL shows lot of connections
I checked my MySQL process list using "show processlist;"and it is showed nothing, But I used "show status like 'Conn%';" to check the connections and it is showed me around 9K ...
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-1
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1
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51
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Prevent proxies connect in my dedicated server
I have one dedicated server, and I use IPTABLES for firewall. Recently, I received a lot of connections (attacks) using proxies to change IPS, and bypass firewall. Have anything do, for prevent ...
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44
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many connections to one of our website
We are hosting multiple websites with Nginx as an SSL terminator. All traffics are proxied through Nginx to backend servers.
There are many connections to one of our websites, netstat shows:
# ...
2
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1
answer
2k
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Data Factory Linked Service for Google BigQuery KeyFil Path
In Google Cloud I have a BigQuery account and I have a Service Account defined there. I want to set up a Linked Service in Azure Data Factory so that I can extract data from BigQuery. I have generated ...
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483
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How to configure IIS 7.5 to allow more than one PHP connection per browser?
On our dev server, I hit /bigreport.php, which connects to MySQL and runs a report. It takes a few minutes.
In another browser tab, I navigate to /smallreport.php, which connects to MySQL and runs a ...
- 31
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37
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Why is server is waiting with second request untill first is fisnished
Not sure what it is, but everytime I try to run one http request from browser, second must wait for first to fisnish. Is it server side configuration/seciurirty?
For example, I have 2 files long.php ...
- 1,201
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2k
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Postfix: define a global concurrency_limit
I need to limit the simultaneous outgoing connections Postfix can make.
It is possible to limit the number of connection per destination with transport_destination_concurrency_limit, but not globally ...
- 302
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1
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31
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Azure components connectivity check
My Project involves various azure products like web job, Event hub, table storage, blob storage etc.
I need to create a Live dashboard which shows the connectivity of the various components.
Eg., ...
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1
answer
32
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I have 6 wan connections, what's the best way to load balance them?
5 diferent companies are going to share the same building, and each one of them have one internet link. I have to use all of the links because of bureaucracy stuff. My server only have 4 LAN boards. ...
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531
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Increase number of rsh connections [closed]
We are using a Server with OS RHEL 7.2 server version. Number of rsh connections to the system is limited to a number around 70. We are getting a message Connection reset by peer from server as that ...
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2
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355
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FTP sites can't be accessed from GUI programs, only command-line
We have a Windows Server 2012 R2 box, running IIS 6.2 (Build 9200).
This is a Rackspace server.
The server was running one FTP site, with no issues.
We had worked with Rackspace originally to get ...
- 358
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1
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1k
views
Identify failing or hanging outbound network connections on linux
I admin a busy webserver which uses nginx/php-fpm , connects out to mysql(RDS) and elasticsearch, but also many third parties for advertising and other plugins etc are on the site(unfortunately I’m ...
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829
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Sudden increase nf_conntrack / ip_conntrack
Often there is a sudden increase in ip_conntrack connections on my server. (See image below).
This sudden increase results in a abnormal increase in SYN_SENT connections.(see screenshot) This is a ...
- 115
1
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2
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2k
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Is it possible having two Ethernet connections simultaneously on the same UTP Cat6 cable? [closed]
Actually it is a two part question.
1.Since an ethernet connection only requires 2 pairs (green and orange), is it feasible to wire blue and brown pairs to a different Lan port of a router and ...
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1
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79
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Can a average computer configured as a router support any number of users (connected clients)? [closed]
I am planning to install a router for a rather big amount of users (50-100), and I have found home routers very unstable for this high number of devices.
When researching, I have found this report ...
2
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1
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367
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Trying to estimate concurrent connections on my server - is this the right approach?
My goal is to find out, roughly, how many apache2 connections my server can handle at one time. I've gone through all of my running processes, including the apache2 processes, and figure that of the ...
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16k
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How to allow more than two simultanous sessions on Azure
One of our servers is on Azure and we are remotely connecting to it. Unfortunately Azure allows only two users to be logged in at the same time. When the third user tries to log in, he is given the ...
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398
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A LOT of connections from my external IP address to my web server
I installed Nagios recently on a Debian machine running an Apache web server among other things.
The thing is that lately, Nagios tells me that the HTTP service is failing intermittently and it seems ...
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1
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1k
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Connecting two GNS3 setups in two VMs in the same PC
How do i connect these two gns3 setups in different VMs? It's all in the same PC. My end goal would be to ping each VPC to each other. I am already able to ping VPCs in with different VLANs but only ...
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57
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connection initiated from linux localhost
One of the linux server was compromised and some of the connections are being originated from localhost to a remote location putting up the information residing on it. I'm trying to trace all outgoing ...
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2
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3k
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increase nginx active connection more than 65535
currently I'm doing setup for nginx to accept C1M, I do in my Virtual BOX with Centos 7.0 and RAM 10G.
Here my sysctl.conf configuration.
fs.file-max = 9999999
fs.nr_open ...
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543
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MySQL connections not closing
I have a web application running on Tomcat7 that connects to MySQL 5.5.
I have two servers running the identical code:
Ubuntu
Red Hat
The Ubuntu one runs fine maintaining a steady 8-16 connections, ...
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234
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3x networks, hardware in 2 locations, 1 connection to join them
Sorry it was hard to think of a title for this, so hopefully I can explain my situation.
We have hardware (unix servers) on 3 different network subnets. For example:
10.44.1.0
10.44.2.0
10.44.3.0
...
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147
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How do I figure out the number of concurrent connections?
Our server architecture is as follows:
Windows 2008 Server RC2
WampServer with Apache 2, PHP 5, MySQL 5
Dedicated connection hits firewall, which is routed to a single web server with multiple vhosts ...
0
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2
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2k
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FreeBSD Established Connections Maxing out at 300
We've previously had issues in our environment where it seemed we were reaching FreeBSDs max connection limit. We took action demonstrated by http://nginx.org/en/docs/freebsd_tuning.html and bumped up ...
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1
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2k
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Open file count keeps increasing forever
I'm experiencing issues with the number of files opened increasing over time. If I run my server for about few hours, it'll no more accept any connections. The limit was 1024. I've increased the limit ...
- 109
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792
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nginx and Mysql Server Load limits (depend on Server config)
my server config is
Technology: Ivy Bridge
Processor: Intel Xeon E3 1245v2
Intel Smart Cache: 8MB
Cores: 4
Threads: 8
Frequency: 3.4GHz+
Turbo Boost: 3.8GHz
Virtualization: yes
...
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532
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syslog-ng 2.0.9 closing tcp connections from some clients instantly..?
I've a syslog-ng instance on 2.0.9, which is old, but... this is enterprise IT and upgrading the versions is... fun... running on Solaris 10. I have this strange problem where some clients stop being ...
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927
views
minicom cmd not showing
I am using minicom in centos to try to connect to a cisco router. I did the configuration with minicom -s changed the serial port to the appropriate one /dev/ttyS1. Saved as dfl. and Exit.
When ...
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1
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32k
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Too many established connections left open
I have a (probably quite old) CentOS 4.5 server with a custom java application running inside.
I found the application was crashing after some running time and found it was handling 1024 connections ...
- 391
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2
answers
127
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aggregating multiple ISP connections
OK, so we have an office in Pakistan. Phone and ISP service is pretty poor there, so they have 2 ISP connections, one thru Pakistan telecom, one thru a different ISP. The PK tele one has a router that ...
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879
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Can multiple servers listen on the same port when no Bind/Accept has occured
When you have a Windows machine (server or home edition) which is running 2 servers, and they are both listening on port 4000, however none have had a request to connect?
What happens when a client ...
- 383
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2
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56k
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Can ping servers but cannot connect to them
Sorry in advance if this question is a bit newbi-ish. I downloaded Microsoft Connection Manager and added multiple .rdg files for different servers I need to access. I can browse to only a few of them,...
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4
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1
answer
5k
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Mysql remote connections logging
I need to allow remote connections to my mysql server running on latest stable CentOS.
I don't like this idea at all so I want at least to collect as much relevant information as possible. To be ...
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3
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84k
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What value of thread_cache_size should I use?
I'm using Asp.Net together with MySQL. In the .Net connection string, I have set Max Pool Size to 150.
If I run the following I get these values:
SHOW GLOBAL STATUS LIKE 'max_used_connections'; ...
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votes
2
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3k
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Windows 7 Network Connections empty
Whenever I try to look at my network connections, the window opens up empty. The only thing shown is the Organize button. I went into Device Manager and deleted my network devices, but now ...
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810
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On a LAMP stack, how to limit the number of concurrent connections and serve a static page for those who are beyond that limit?
I'm aware of the Apache directives MaxClients and ListenBacklog. I'm trying to set a limit of, let's say 100 concurrent connections after which the new connections will be served a static page. Can ...
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9k
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haproxy and persistant connections
I am using HAproxy to load balance between more web server. Those webservers are using PHP and sessions to keep one's session open.
Now, I think that when a user refreshes the page, it is sent to one ...
- 227
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5k
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limiting the number of global connections per second
I want to limit the number of ALL incoming NEW connections on a port, not only from one IP, something like:
iptables -I INPUT -p tcp --dport 22 -m state --state NEW -m limit --limit 3/s -j DROP
But ...
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2
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1k
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How can I connect to some old Sun servers?
We have some old Sun servers (V125, V210, V240, T2000 amongst others) sitting unused and I've been asked to find out if there is anything useful on them before they get wiped and disposed of. However,...
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798
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CentOS 6.2: apache stops accepting connections
I have server with CentOS 6.2, apache 2.2, php 5.3, mysql 5.1. Server is installed in KVM container.
From time to time apache stalls. It just stops accepting connections. Looks like it reaches ...
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3k
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windows 2008 R2 server IIS 7.5 not loading pages on first visit...requires refresh 2 or 3 times
This could be a network thing at my ISP where my box is colocated...not entirely sure. I wanted to just check here to see if anyone has seen an issue like this that is server related so I can check ...
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870
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Best way to connect two separate networks with separate internet connections within the same building
I'm a programming intern, and since I'm the only one in the company who seems to have rudimentary knowledge of Linux I've been given the task of setting up a network so that employees may share files ...
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