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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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 it'...
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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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231 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
2k 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
150 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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9 views

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
85 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
419 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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58 views

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: 0....
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1answer
181 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
17 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
48 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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3answers
4k views

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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0answers
198 views

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
315 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 my....
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55 views

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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1answer
23 views

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
135 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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69 views

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
30 views

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 network....
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2answers
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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
117 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 :http://example....
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1answer
33 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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356 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
25 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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1answer
189 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
1k 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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76 views

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 ...
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Cant configure NAT in iptables

Есть два сервера с линукс. Первый выполняет роль роутера, он имеет два сетевых интерфейса, один из которых подключен к интернету, другой к локальной сети. Второй сервер подключен к локальной сети. ...
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1answer
123 views

iptables outgoing default policy is accept, but some ports appear blocked

I'm new to servers and iptables. I have a web app (happens to be bugzilla) running on my Centos 6.7 apache/httpd server, and it attempts to connect out to the web (updates.bugzilla.org) via port 80. ...
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1answer
78 views

only allow a specific port that can be connected by only one ip address at the same time

I have a open port, 40002, I want to limit that at the same time the port can only be connected by one ip address(not specific address). if there is an ip address conntecing to that port already, ...
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1answer
83 views

Tomcat and Apache parallel usage on different subdomains

I have just set up an Ubuntu server with Tomcat7 and Apache2. Apache is running on port 80, Tomcat on port 8080. What I want to do now is to redirect certain subdomains to Tomcat. mydomain.com ...
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159 views

Nginx listening on different port but not accessible from outside

OS: Ubuntu 12.04 I have both Apache and Nginx running. Apache is listening on port 80 and that is why I want to make Nginx listen on different port, in this example it would be 90. Below is the ...
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2answers
43 views

Firewall setup - Input and Output

Sorry for my english. I am having some troubles understanding if I should open ports via input, output, or both. For instance, let's take the basic HTTP port 80. To set up a standard client. If I ...
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1answer
101 views

Docker run command, expose port private only

docker run -it -p 8080 myimage /bin/bash I would expect the code above to expose port 8080 private. However when I run: docker ps -a It shows: 0.0.0.0:32770->8080/tcp How does one set port ...
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How should I set up my sub-domain to allow it listen on a port for web socket transfer?

This may be a really beginner question, but I really want to make sure I'm going in the right direction before investing time in this. Heres what I have. charlieli.me @ 45.55.33.185:80 fileserver....
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2answers
153 views

Do network administrators block outgoing traffic to not-well-know ports? [closed]

I've written a Java server to listen on port 49474. My client runs on Android phones all over the US. Of course, they will be connecting from a variety of networks: home, work, school, library, ...
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125 views

Error when viewing database mirroring monitor in SQL Server with non-default port

I have database mirroring set up (with witness) on SQL Server 2014 Standard. Both servers use default instance on a non-default port (not 1433). Mirroring works perfectly fine. However, when I try to ...
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188 views

IPA Server installation: Error with port number

When I am trying to install IPA server, I am getting the following error : IPA requires port 8443 for PKI but it is currently in use. Aborting installation I checked with netstat -tuplen | grep ...
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2answers
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okay to allow any outgoing port for sending mail

I have a small app on my centos6.6 server i am running that allows the user to send an email on a custom port and I am allowing any port to be used. Is there any security risk for allowing this app to ...
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83 views

Debian Openvpn port closed

Newbie in linux! there is already similar questions are asked here, but the solutions are not working for me. can somebody help me with this issue: I have been installed openvpn server on debian 8.1 ...
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2answers
94 views

How to list open but not used (by a process/program) port?

I have a VPS with debian wheezy installed on it. A firewall is active on the it with all ports not allowed by default. The firewall can be managed through the web interface of the provider of the VPS ...
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2answers
155 views

Multiple protocols on the same port [closed]

From my understanding, Facebook Messenger uses 443 for both HTTP and MQTT (or whatever protocol they may use now) traffic. That seems to be a good strategy, as in some very constrained networks only ...