Questions tagged [connection]

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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Azure Database for PostgreSQL server connection is not working when using a macbook pro.With windows is ok [closed]

I can't connect to my posture database when I'm working with mac. Windows i confect with no problem. Already added to firewall rule, all ip address. Already turn off firewall on mac book, tried with ...
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Can't see node STRAPI CMS application from outside - ERR_CONNECTION_REFUSED

I tried to run STRAPI CMS on my VPS. App runs via PM2 and internal curl is ok, I see response from app curl -v http://127.0.0.1:1337 But external curl is problem, nowadays I want to access just it ...
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Connecting SCA-2 Ultra320 disk to some controller using some cable

This is "blast from the past" type question. I need to make a backup of data stored on SCSI disk used in a large industrial machine. That machine takes SCSI Ultra320 drives like Cheetah 10K....
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Icinga2 alert configuration

I want to make a configuration on some ip with some port that will alert me when it is in Listen mode and there are more than 5 connection established. Is that possible ? for example i have 192.168.1....
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ssh connection refused for Google Cloud Platform instance

I am trying to connect to my Google Cloud VM instance through SSH. I didn't have any problem before I mounted a new 500GB zonal persistent disk and even then I was able to ssh and format the disk and ...
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how can torrent be p2p and without needing to open ports? [closed]

I've been using torrent for years now and I am planning to write a simple golang program to manage p2p connections... But since I see everywhere that for a p2p program to work, one must specify an ...
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Even though SELinux, firewalld, iptables are disabled on my VPS “curl: (7) Failed connect to … Connection refused error” [duplicate]

I rented a KWM VPS storage server (CentOS 7) and I can access it via SSH and SFTP. But I can't do anything with it because it refuses everything. I didn't install anything on it, didn't change any ...
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No valid IP addresses found for subdomain with certbot

I am currently trying to set up an email server, and recently stumbled over getting a SSL certificate from Let's Encrypt in this question and realizing it isn't necessary if I don't have a web server, ...
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Traffic stops after some minutes via VPN gateway between vnet and on premise machines and then starts again

I have a on prem network (192.168.100.0/24) and a vnet (10.0.0.0/16). On prem a Fritzbox 7490 connects with ipsec policy based connection to the VPN gateway in azure. Connection is up and running, no ...
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Postgres remote connection timeout works on one machine but not on another

im trying to connect remotely to a postgres database, after opening the connection for my public IP address on the server hosting the database, I was able to connect successfully to the database from ...
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Connect Azure Web App to policy-based VPN

I have an Azure Web App that needs to connect to the addresses xx.x.x.10 and xx.x.x.12 the customers on-premise server. For this purpose the Customer have setup a Policy based VPN (Cisco ASA 9.8) with ...
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OpenVPN connecting via CLI versus Client App

My DB is hosted by a third party and in order to connect to it I must whitelist IPs. I have setup an OpenVPN server so that our engineers and CI servers can connect to the DB via the VPN. When I ...
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Customizing Cognos 11.1.6 Connection Portal

Previously in Cognos 10 you could customize the connection portal by adding a company logo and/or fonts and colors. These settings could be changed by editing the banner.css file on the gateway web ...
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DHCP Server stops handing out leases

I currently have a DC running Windows Sever 2008 R2 (yes I know) and for the past two weeks, when employees travel back to the office, they can't connect to the internet unless I do one of two things. ...
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Network settings to execute webapplication performance tests from Windows Server

Web applications needs to be tested from a Windows Server 2012 R2 machine. Performance tests are executed with JMeter 5.3 on 300-400 threads. During test execution, following errors are coming in ...
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Common reasons for refused connection

When you try to access a HTTP server (e.g., www.example1.com) and the connection is refused, what could be some common reasons at the server end?
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UFW blocks Docker interfaces when default outgoing policy is 'deny'

Given that I configured UFW like so ufw default deny incoming ufw default deny outgoing and just allowed certain ports for outgoing and incoming connections. It works fine, except when connecting ...
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What is meant by TCP connection pooling?

Why is creating a new TCP connection regarded as expensive? was the question I had in mind when another one came to my mind. What exactly is meant by keeping a TCP connection alive and what is meant ...
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Multicast Connection within the same Vlan

I'm trying to resolve a multicast connection issue with my system. I have been solely focused on looking at the configuration of my primary switch. I have another working multicast configuration in my ...
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Nextcloud Server from inside network only answer to one client but outside network works fine

I have set up an nextcloud server inside a network. The network consist of a border router 192.168.1.1 and a subnet with another router at 192.168.1.3. The server sits in this subnet. On the border ...
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115 views

Keeping SSL connection active between reverse proxy and backend server

I have a back-end server (Apache) that is too far from most of our users, so our idea is to implement a closer reverse proxy that will act as a cache. At first glance it worked as a charm. The cached ...
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610 views

What is .max_connections parameter in varnish vcl and how to caculate this value for backend nginx server

I have seen .max_connections parameter in varnish default.vcl and by seraching in web, found the artile below .max_connections: how many connections you authorize Varnish to open to this backend. ...
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I can ssh from host1 into host2, but on host 2 I seem to have no connectivity to the network (no ping, no dns, nothing works)

I assume it's related to a bad configuration on host 2 because a 3rd host plugged into 2'socket works fine. This is all wired in the same subnet with a switch in between. 'ping' produces 100% packet ...
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IIS servers/apps loosing connection

We have a setup where DataPower servers send a request to our F5, that request is handled by one of 9 IIS servers, Windows 2008. Each one is a short lived session of up to two min. There are several ...
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how to do scp in linux

I am getting following error while doing scp, what could be the reason? [~/workspace/xr-dev/call-home/core/src] /usr/bin/scp myfile.c host2:/scratch/shirohua/ shirohua@host2's password: usage: scp [-...
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mariadb php connection error (110)

I have a mariaDB service running on a remote server A. I have a second remote server B running httpd. Both server A and B's NAT firewall allows all traffic for port 3306 and ICMP. Server B allows port ...
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How to intentionally cause ssh root connection refused

Simple, how do I make ssh (port 22) drop/refuse a connection if root@ip_address request is received, but still allow user@ip_address to work properly. Basically hide the fact there's a server at that ...
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Random MySQL connectivity issues?

I can run the exact same command over and over again and sometimes it works, sometimes it doesn't: root@bak-rrk9m:/# mysql -Bsuroot -p"$MYSQL_ROOT_PASSWORD" -h"$...
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278 views

UDP connection i/o timeout while port is reachable

on one server we encountered an issue where all kinds of UDP connections are failing. The same application and tests work on other servers with the same OS and similar setup. nc -vz -u 83.61.**.** ...
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EC2 instance stopped responding

I have an EC2 instance that I can no longer connect to. Previously I could connect via ssh and http(s), but now I get "ERR_CONNECTION_TIMED_OUT" errors. No AWS security rules or network settings have ...
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239 views

connect Crystal Reports with JDBC to PostgreSQL

I want to connect Crystal Reports (2016, Support Pack 8, version 14.2.8.3426) to a PostgreSQL 12 database. Using JDBC. The database is on my local computer, on port 5433. My database name: ogc ...
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Losing connection to servers after 5 min (different ports)

A month ago I moved and made a new contract with a new ISP (Claro Peru). Since I switched from ISP I noticed that my connections to servers are always cut after 5 minutes of inactivity (Connections to ...
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OpenVPN connection stops working every 5 days

I've been pulling my hair out over this issue for awhile. For 2 year, i've been running OpenVPN on Ubuntu 18.04 without many issues. As a virtual server on Virtualbox on a Windows host. Now i've ...
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Service sometimes working, sometimes not working

I want to connect Centos B's 33060 port from Centos A. I can ping Server B. [root@serverb ~]# ping 10.42.40.182 PING 10.42.40.182 (10.42.40.182) 56(84) bytes of data. 64 bytes from 10.42.40.182: ...
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Rekeying denies protocols/NAT issue or config?

I'm using strongswan to connect to a MAC server using IKEv2/IPsec configuration. The server uses the proposed algorithms to establish the SA and everything works great. Upon rekeying however, the ...
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How to connect computers directly with ethernet?

I try to connect two linux computers via a crossover cable. I need help at troubleshooting. I configured ip-address , and on PC1 ifconfig-command shows enp0s7: flags=4163<UP,BROADCAST,RUNNING,...
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How to close the connection if the user accesses the website using port 443 on http?

How do I give a Connection Reset error to the user if the user accesses the website like http://example.com:443, instead of giving the following error: Bad Request Your browser sent a request ...
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Internet connection slow in linux [closed]

I have a problem with my new internet connection. This is a symmetric 500Mbs connection but i only get 50M in my linux computer. In windows I get 500Mb for up and down with other computer. I know ...
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Server not connecting to the internet on new CentOS install, but ethernet is connected?

In the past, whenever I have set up a new install, I haven't had to configure the IP manually, because the IP configures automatically. Not so in this case. This time around I took a new server and ...
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How to access internet from VM instance in Openstack?

I've been scratching my head for last 5 days, almost went to the end of Internet, read a lot of tutorials, made a lot of re installations an re configurations of openstack but at the and of the day ...
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1answer
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Current Network setup of more than 10 PTP connection from different ISPs, After going Azure how to connect them

Currently I have a full infrastructure setup in my on premises - Oracle database and clients connections. I have now shifting my database over Azure & hence my all clients should connect to server ...
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Can't connect to nginx server from public IP Address

Hi I have a nginx server running on a linux machine. I can connect it to from localhost using curl -v http://localhost:8080 fine. But can't connect it to using curl -v http://<machine-ip>:8080, ...
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354 views

How can I debug a FTP connection loss?

I need a little bit help. Currently I have a server in a datacenter and an FTP Server in another that I use to backup files. My problem is that some times the connection just got lost. It may happen ...
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which means double 2 points 192.168.1.2::3 in a vnc connection

install real vnc to make connections to a windows server but at the time of accessing me it appears that to access I must approach it with the route 192.168.1.2::3 I understand that : after the IP ...
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MongoDB connection initialisation delay on certain Windows 10 devices

Ref: https://stackoverflow.com/questions/58856620/mongodb-connection-initialisation-delay-on-certain-windows-10-devices System info OS Name: Microsoft Windows 10 Enterprise OS Version: 10.0.17134 N/...
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In which case Apache Httpd writes “X” when connection is closed? Is it client side or server side?

Standing to official Apache mod_log_config docs I see it writes "X" when "Connection aborted before the response completed". Connection status when response is completed: X = Connection ...
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How to diagnose source of website blocking?

When accessing sites through my ISP, certain sites don't load. The DNS resolves fine (via nslookup; also, the hosts file is fine), but then accessing them through any port times out (eg. tracert or ...
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Dropped idle connection after 5 minutes [duplicate]

we're having a strange issue with our Azure virtual machines. When we make a connection to the servers, via socket, then leave it idle for exactly 5 minutes, the connections gets dropped. It does not ...
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1answer
346 views

Error: 0xC002918F at FTP Task, FTP Task: Unable to connect to FTP server using “FTP Connection Manager”

I am trying to download data files from a FTP server to local machine through SSIS. But it throws the error Error: 0xC002918F at FTP Task, FTP Task: Unable to connect to FTP server using "FTP ...
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OpenVPN Site-To-Site Setup: Client LAN to Server LAN succeeds, but Server to Client fails

Network setup: AWS subnets 10.0.0.0/24 10.0.1.0/24 10.0.254.0/24 Home subnet: 10.62.5.0/24 OpenVPN subnet: 10.8.0.0/24 At AWS, there's an OpenVPN server running at 10.0.254.234 on Windows 2016. ...

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