Port is a generic term that can refer to port number (software related term), and computer hardware port. Here, questions referencing this tag refer to port numbers.

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Firewalld not opening port 25? [duplicate]

Lookst like firewalld is not opening port 25. I tried adding the smtp service, and port 25 separately as well, yet, I am unable to telnet to the server. Any tips? [root@host ~]# firewall-cmd ...
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How do you allow all non-standard port traffic via forward proxy?

when the proxy is set for http and https traffic (say on a tomcat app), is this only for standard 80/443 traffic? I was wondering what ports you have access to when you set the following attributes ...
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Watchuguard access to external server from internal network

It looks, like my problem is common, I tried every single hint I found, but nothing is working. Here is my problem. I have an internal network behind Watchguard m400, with few VLAN's on ports. I ...
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1answer
119 views

Iptables are blocking WildFly10 on CentOS 7

I've CentOS 7 server without firewalld but with iptables installed. There's WildFly 10 is running with changed socket binding http port 8080 to 80 in standalone.xml. I'd open 80 port in iptables ...
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1answer
26 views

Valid ranges for web site ports in IIS

In IIS for Windows, you can specify a port for a web site under "Edit Bindings". 80 is the default port and 443 is for a secure protocol. I'd like to get a complete list of valid port ranges that ...
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1answer
69 views

Open port 1194 for openvpn service

I am looking to open the openvpn service on my CentOS VM. When I run nmap -sU localhost -p 1194, the following is output: Starting Nmap 6.40 ( http://nmap.org ) at 2016-01-08 13:23 GMT Nmap scan ...
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1answer
55 views

SSH connection refused, probably server firewall, how to solve? [duplicate]

I'm trying to connect to my server via SSH. I get the (well-known) error: ssh: connect to host 12.345.678.910 port 2222: Connection refused So I first thought the problem was with my modem, but ...
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1answer
15 views

Does using different ports allows for less congestion on server Apache

I have 4 different virtual host running on my server under Apache2. Until now some where listing on port 80 some on 443 and some on custom port like 434. Please disregard SSL issues here. My ...
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2answers
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firewalld: if I change the ssh service port, is it enough to allow the new port number, or should I add a new service?

I changed the ssh port to an arbitrary number, and noticed firewalld no longer allowed ssh login. I assume the port 22 is hardcoded in the ssh service definition for firewalld. Is it enough if I ...
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2answers
78 views

can't connect to tomcat/telnet to a remote host

I want to connect to a tomcat installed on a VM which is running on my laptop however I am not able to connect to it. I stopped the IPTables to ensure that this is not a firewall issue. I can ping ...
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2answers
391 views

iptables doesn't close port 3000?

I wanted to configure iptables on my server in such a way that only specific ports are open. Nevertheless I can access e.g. port 3000, if I run a web app on it. What could be the reason why 3000 is ...
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2answers
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Block specfic port for the access of the application from outside with impacting the access to local host scripts [duplicate]

I have setup one application 'phanthomjs' that is running of specific port 6423 I wish that it should be accessible to script that are run locally on the box 'localhost', not accessible from outside. ...
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54 views

nginx location regex with redirect to specific port

I have a problem using nginx in combination with location regex and x-accel-redirect feature. Below is the description of my setup. I have nginx running on port 80 on localhost. I have a http server ...
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SOCKS4 can't handle connections all going through the same (open) port

I live behind a firewall and I managed to proxy anything I do to the proxy behind the firewall. The Port 27032 is open and still, if there are too many connection requests at a time, the proxy can ...
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1answer
157 views

GitLab not listening on ssh port

I've just installed GitLab CE on my VPS running Ubuntu 14.0.4 LTS via omnibus, made the following changes to /etc/gitlab/gitlab.rb and re-ran sudo gitlab-ctl reconfigure: ...
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gitlab port forward tom foolery

We have a public-facing web server (CentOS 6 w/ Apache) that will need to forward requests, both from public and a private interface, to a separate host that's running Gitlab. For security purposes, ...
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1answer
50 views

How to re-open the port?

I've a server with root access, I opened the 4022 port for ssh and it was working very well before, Today I try to connect on my server via ssh, but nothing happened, so I checked that via nmap and ...
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Dumb Switch to Smart Switch - Ports going up and down, what's up?

I just switched from a dumb switch 10/100 to a smart switch HP 1920-24G-PoE, and noticing ports going up and down randomly. I can't see any obvious reasons why this is happening so am curious if ...
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153 views

Why would Windows Server 2012 not respond on ports above 6000?

This is a new question but similar to this previous one. I've inherited the management of a Windows 2012 Server (not R2) and I'm unable to get a response from any ports above 6000. I have services ...
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Too many internal connections with apache server on ubuntu/azure

My apache/wordpress server running on ubuntu 15.10. on azure is periodically running out of memory. One thing that is puzzling me is the large amount of apache processes even though there is no ...
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1answer
418 views

Port 80: connection refused. How to fix on Mac OSX? [duplicate]

I've noticed some issues with Apache virtual hosts on two Macs that otherwise have the same kind of set up (in terms of httpd.conf, vhosts, hosts etc.) On one Mac, virtual hosts are served without a ...
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1answer
22 views

Host for Dedicated Box blocks Port 25, can I still email directly off the server using Port 26?

I have a server that I want to send email off of directly. Host is blocking Port 25. They have told me to go to WHM -> Service manager -> exim on another port (Set to 26) Is this actually a solution? ...
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1answer
95 views

Port is listening but cannot connect from remote [duplicate]

I have a catalyst server running on a VM. [info] Hello powered by Catalyst 5.90103 ...
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IP Table settings not allowing IP SSH access [duplicate]

I have set up a knockd server on a virtual machine "192.168.56.101". I have set up IP table rules to block access on the SSH port (22). Now, when I execute the following command (on knock success), ...
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1answer
62 views

How to access the web page using specific port?

I created two directories for storing the website on the web server /web /web/admin Assume that my website domain is http://www.domain.com/ and I would like to using the port 8080 for the admin ...
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2answers
222 views

Port-scanning on Cisco router with Nmap

I have Cisco 2911 router just booted with factory settings and no ACLs or NAT configured. All I did is turned on the interfaces and assigned IPs. I am trying to scan for open ports with Nmap, but the ...
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server 2012 not receiving data on specific port

I installed a windows server 2012 r2 standard + sql 2008 r2 standard on a new dell server for a client of mine as regular workgroup file server (not acting as a Domain Controller) 3 months ago and all ...
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cannot bind a port altough LISTEN

I'm new to this problem I'm using Ubuntu 12.04 LTS via VMware My problem is to bind port 6703 i tried alot of commands to check if this port or open or not Error Message is Failed to bind to: ...
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1answer
166 views

Why is iptables not blocking any ports?

I have iptables running and the most recent rules applied (i.e. I restarted the service and it says everything is "OK"). I have only used system-config-firewall to edit/define any rules, so I ...
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1answer
15 views

Centos Ports for Updates, Repositories etc

I want to use a Proxy-Server which is free to use from the network, my nodes are placed in. But this Proxy only allows the Port 80. My question is, if somebody knows, which ports are used for the ...
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1answer
47 views

Track web application access through windows server

I have a web application running on Amazon EC2 accessed on the port 80. I would like to track the users who have accessed my application via windows server log. However when i go on the logs i can ...
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Is it safe to serve HTTP/HTTPS over ports 8080/8443

Due to an infrastructure limitation, one of the proposed solutions for serving an HTTP service to the world is to offer it over ports 8080 and 8443. My concern is that some users may not be able to ...
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How to proxy setup nginx with play and angularjs

I am learning play framework and angularjs with nginx. The play app is running on port 9090 and angularjs app is running on 9000. I am trying to proxy all requests to /app/* to the back-end Play ...
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3answers
269 views

apache2 change port from 443 to 7443

I'm using the default apache ssl conf file "default-ssl.conf" If i leave it alone using my self signed cert i can get to the page using 443: <VirtualHost _default_:443> ServerAdmin ...
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TCP and UDP ports usually blocked [closed]

Which are TCP and UDP ports most likely to be blocked? I refer especially to the client edge of the network. To start I guess SMTP (25), SIP (5060) for TCP, Traceroute (33434) for UDP.
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Setting up Apache as fallback for webapplication server on Centos

I run a web application server (namely, eXist db) which listens to port 8080. Unfortunately, eXist is not totally reliable. Therefore, I'd like to set up Apache 2.4 as a fallback web server: Whenever ...
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1answer
28 views

Web application access permission

I have a web application that uses SQL server . SQL server is hosted on a server and accessed using port 1433 . My question is will the user who is accessing my application required to be able to ...
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1answer
102 views

Change server manager rdp connecting port (azure)

I have been trying to establish a remote desktop connection to a azure server using the server manager that is included in the rsat. But I havent find a way to connect to the server because my server ...
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VPN Server not working on AWS

I'm running SoftEther on my home computer and after some basic configuration (Server 2012 R2, ports forwarded to server), everything works. I am able to use my computer as an L2TP server. I tried ...
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2answers
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Scan LAN ports for devices other than computers

I have a fingerprint device attached to a LAN and I want to figure out the port number used. I could not figure out from its settings and configuration, so I thought to do a port scan over the ...
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2answers
56 views

wget only works when tcpdump is listening

I am running two Virtual Machines over the XEN hypervisor both with Ubuntu trusty (Linaro-Developer version) with the following simple bridge networking setup: Backend domain (dom0): br0 ...
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1answer
90 views

Port 80 is not accessible, although opened in iptables

I have an Ubuntu server running by a hoster and am trying to set up an nginx server with a config: user www-data; worker_processes 4; pid /run/nginx.pid; events { worker_connections 768; } http ...
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How to redirect subdomain to other port using Apache2 server with reverse proxy

Thanks in advance for your help. I have, in my home server running Debian 8, installed Deluged (torrent client) and a web UI to control it. I can access this web UI using the address ...
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1answer
28 views

how to limit number httpd process for port 80

So lets say I have 10 instances of httpd on port 80 and another 10 on 443. I run everything through 443, so I don't see the need to balance the connections (80 is used only to redirect to 443) How ...
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307 views

Endpoint creation doesn't work in Azure Preview Portal

I'm trying to open up port 443 on an ubuntu setup using the docker quickstart for wordpress + mysql. Because my VM is classed as "new" it only shows up in the new preview portal on Azure and doesn't ...
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1answer
21 views

Change NFSv4 Bound Port?

I need to use port 2049/tcp for another purpose. Is there a way to change which port NFSD binds to? I don't need NFSv3 or NFSv2 so I am not using rpcbind service. I cannot find that config option...
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135 views

Change the order that an IPTABLE CHAIN is read (Using Fail2Ban)

I have some experience using iptables and fail2ban. Both are working as they should, but I would like to optimize the way packets are "DROPed" when IP & port probing occur. Fail2Ban is doing a ...
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1answer
897 views

Getting 'ERR_CONNECTION_REFUSED' when trying to browse port mapped to Docker container

I have pulled a Docker image: $ docker pull ghost And run a container from the image: $ docker run --name test-ghost -p 8080:2368 -d ghost ...
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Is firewalld blocking return traffic?

I'm on Debian 7 trying to forward requests to other machines through firewalld and have the following setup: --HOSTNAME-- ----IP----- ------------Configuration------------- Firewall 192.168.0.2 ...
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interface not showing on port-channel (dell S5000 switch)

Our trunk went down due to a faulty cable, but when we had it replaced, the interfaces (speficially TenG 0/4 and /5) are not being shown on the port channel group even if they are physically up: Our ...