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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2answers
258 views

Can't SSH, but can TeamViewer [closed]

I would like to SSH into a computer behind a firewall that blocks SSH connections (incoming and outgoing). Amusingly, I can still access the computer using the remote-desktop software TeamViewer. I ...
2
votes
1answer
610 views

Port 8080 remains closed even when opened with iptable and nodejs is listening on it [duplicate]

I am trying to install a nodejs server listening to port 8080 that I opened with iptable but when I run nmap or a web tools I always get the message that the port is closed. I'm on a Ubuntu vps. ...
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1answer
1k views

Windows Server 2012, application needs administrative access to open port

How can I grant an application access to listen on one particular port, without running it as Administrator or disabling UAC? Per policy, had to transition from an old server (Windows Server 2003) to ...
2
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2answers
167 views

Explain how to bind a service to a ip and port [closed]

Yesterday I had a discussion about running the same service, for example SMTP, on the same port on a server. I think this is possible by assigning multiple ip addresses to the server and bind the ...
2
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1answer
6k views

OpenVPN and port 1194 closed

I installed openVPN on my server. By default, the port 1194 is choosed. The problem is that when I am running: sudo nmap -sU localhost -p 1194 It shows me: PORT STATE SERVICE 1194/udp ...
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2answers
9k views

How does server handle multiple clients on the same port? Multiple sockets or multiple ports? [closed]

I have a misundertanding about some networking theory and because I couldn't find a definitive answer online (most resourceas are theory and theory etc without concise examples) I'm asking here. ...
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2answers
1k views

Apache / Tomcat port information

I have few questions regarding the Apache HTTPD server and the Tomcat web server port configurations. Through netstat and TOMCAT/conf/server.xml I understand that: 80 and 443 ports are used by ...
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2answers
1k views

How can I make Jenkins inaccessible to the outside world?

On a development server, I have installed the tool Jenkins for automated testing. This runs on port 8080. If I go to www.mysite.com:8080 I can see the command panel for this. I want to make this ...
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2answers
357 views

Which TCP ports to use?

Is there a TCP port range which I can be sure will not be used by anything else for traffic between two machines? If I am reading RFC6335 correctly, I can be sure that no other applications will use ...
2
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1answer
96 views

Forward Requests to Subdomain to another Server [duplicate]

Possible Duplicate: FTP reverse proxying based on hostname/domain I have 3 servers which all have FTP on the same port. They are all at the same ip address behind the same router. The ...
2
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2answers
2k views

iptables: Allow port range but deny to certain IP

I am running a server which needs UDP ports 1000:11000 opened, as well as TCP 10011 and 30033 open to function. I have a set of iptables rules set to allow SSH and those ports, and intentionally left ...
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3answers
3k views

Examining Multiple Ports When Running NetCat (nc)

I am looking to test if specific ports are on a host are open. I am using: nc -z host 22 nc -z host 80 nc -z host 443 nc -z host 8080 which works, but it would be nice to use a one-liner like: nc ...
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2answers
755 views

How to redirect ports for on a virtual interface?

There are two IPs associated with one physical network interface eth0 and eth0:0. The following works fine for the first interface: iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 80 -j ...
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2answers
2k views

IPTables - Change Port of outgoing and incoming packets

Is it possible to configure IPTables in a way that all outgoing packets to a certain IP and Port are altered with a different port and do the same for incoming packets? I have to work with a server ...
2
votes
1answer
413 views

Recommended ufw port configuration to secure tomcat web-application ubuntu server?

Assuming an ubuntu server operating web applications on Tomcat (with redirection from apache 80 to 8080). What is the recommended port configuration to secure the server? Thanks. P.S.: I would like ...
2
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2answers
686 views

MDaemon cannot start IMAP server, seem that “something else” is blocking it

We were using our MDaemon email server on Windows Server 2003 for years without any issue. Since a few days, the IMAP server suddently stop and gave us one error message: Winsock Error 10013 ...
2
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3answers
466 views

Port rerouting alternative to IPTables?

I am trying to reroute ports on a specific IP. Is there any way around this without using iptables? BACKGROUND I am using node.js & socket.io as a real time server. To ensure this server is ...
2
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1answer
1k views

How to fix customer display pole that displays garbage?

I have an Openbravo POS workstation with a customer display pole. The pole is VFD-860. When I click on the products on the Sales page of Openbravo, the display responds but displays garbage: When I ...
2
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1answer
1k views

Bind Xvfb on localhost rather than *

I am using Xvfb to run an a wine background application that needs a valid display. It appears that it binds to *:x11. For security reasons I would like to avoid opening any unnecessary ports. Is ...
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2answers
22k views

How can I check if a particular port is open from one site to another?

I want to know if port 139 TCP is open from a server on one domain to another. How would I do this? I know that I can use Telnet to test port 25 to a server with Exchange installed - but that only ...
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2answers
6k views

How to test firewall connectivity?

Somehow I have been charged with the task of organizing the installation of a new production environment involving 4 servers. I have to make requests to the Network administrator to open up ports on ...
2
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2answers
466 views

Redirecting to port 8080 if accessed by a certain domain

I am running Apache on port 80 of my server, and JBoss on port 8080 of the same machine. How can I have Apache redirect requests with a certain domain name to the JBoss server on 8080? I'd like to ...
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3answers
2k views

DELL switch 6248 port and mac mapping using SNMP

I have a Dell 6248 switch. I connect some of my servers to it and want to know which server nic connected to which switch port. I try using snmpwalk to get this information, but I just can get mac/ip ...
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3answers
3k views

How do I configure Windows Firewall for FTP Server

What ports do I need to open for me to be able to access Windows FTP server (running on Server 2008) for both active and passive FTP? Opening 21 on it's own is not enough.
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2answers
32 views

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. ...
2
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1answer
151 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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2answers
183 views

How can I get a list of the ports that Wireshark knows?

When I need to choose a new port to use (internal to an organisation) I used to look in /etc/services. This is no longer sufficient, as Wireshark knows about many other ports that are not in ...
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2answers
3k views

VMware ESX: Unable to delete PortGroup. 1 active ports

At work we have an ESX 4.1 cluster with some vlan's (Port Groups) configured on a vswitch on each host. A lot of these port groups aren't in use anymore so we decided to clean them up. We don't have ...
2
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2answers
472 views

Route webserver on 8080 through another webserver on port 80

I have a local webserver that is mapped to port 80 (Windows, XAMPP http://www.apachefriends.org/en/xampp.html) and a domain "mydomain.com" that directs to the local webserver's IP. Everything works ...
2
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1answer
2k views

Sendmail & IpTable Rules

I need to setup IpTable Rules for a server with nginx, ssh and sendmail. Now, the problem is, with my rules I can not send emails to other hosts anymore. Emails to localhost do work, but sending to ...
2
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1answer
5k views

proxypass apache over nonstandard port - how can it be that the 192.168.*:9999 works from the computer itself but not another computer on the network?

httpd.conf vhost looks like this: <VirtualHost *:9999> ServerAdmin admin@example.com ServerName www.example.com ServerAlias example.com # Indexes + Directory Root. ...
2
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1answer
218 views

Putty alternative for windows with support to remote port forwarding

I have been trying to find an alternative to putty for windows. It needs to be portable and it must support remote port forwarding. Putty has had problems with its own implementation of remote port ...
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2answers
12k views

Why am I unable to telnet to a local port that has a listening service?

I suspect this is either a very simple question, or a very complex one. I have a headless server running ubuntu 10.04 that I can ssh into. I have full root access to the system. I am trying to set up ...
2
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4answers
3k views

Cent OS firewall opening port

I've installed postgre on a CentOS server. I basically followed this guide here: PostgreSQL On the last step it says I need Open TCP port 5432 and to do so I need to add the following line to my ...
2
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2answers
117 views

General firewall / security procedures for webservers & databases

My webserver and database server are separate. All I've done to secure the webserver is used ufw and denied from all except ports 22, 80, and 443. What else really needs to be done there? On my ...
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3answers
2k views

Check port status on CentOS

I have a CentOS machine, and I opened a port on witch I should get a stream (actually it is the 5004 port - rtp). However, seems like the stream is not received. Is there anyway to check on status of ...
2
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1answer
84 views

what port do use for vpn?

At the moment I'm running an OpenVPN server on a non standard port. Unfortunately this make some roadwarriors unable to connect because of traffic limitations depending on where they are. Sometimes ...
2
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1answer
9k views

Which ports does WMI Service in Active Directory use exactly?

I read in the technet, that the WMI Services uses random ports over 1024 because of RPC.. Now is the question does it use 1025-5000 because of the microsoft port reservation or could it use more than ...
2
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2answers
167 views

Can I run a web site from my home network without jeapordizing other computers on my LAN? [closed]

I have a home LAN with 5 computers and a NAS, all connected to a Linksys router which is connected to my Cox cable modem. I'm interested in having one of my computers run an IIS-based web site and to ...
2
votes
1answer
293 views

My Ruby on Rails application only works if the address contains the port

I have a Ruby on Rails application that works ok on my notebook ( http://localhost:3000/ ) I uploaded it on my hosting server, created with CPanel X an application, the URL is ...
2
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4answers
138 views

Anti-virus and network ports?

I think that anti-virus would be able to determine the virus even before it gets into the OS (Windows/Linux) by filtering at the network interface port itself. Right? But, how do viruses escape that ...
2
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2answers
7k views

How to change listening port on webbserver IIS 7 (globally)?

Is it possible to change the portnumber to which IIS 7 is listening for incoming questions, if I have Apache and want it to listen to port 80 and IIS 7 to 8080? And this setting should be serverwide ...
2
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2answers
43 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 ...
2
votes
2answers
125 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, ...
2
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2answers
420 views

How can I release a port that is still in use but not bound to a process?

I'm running a Python application that spawns multiple processes. It uses port 56008 to listen for client requests. Sometimes after closing it the port it used is still "in use". There are still some ...
2
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4answers
114 views

apache port number [closed]

For each development sites I want to have a unique port number. For instance, domain.com:1234 This is what I have in my httpd.conf file. After restart the page domain.com:1234 is not showing in the ...
2
votes
1answer
90 views

Can I change the port for SSH on a hosted server?

I am changing over to a hosted server and I want to use non-standard ports for SSH. Is this possible? Wouldn't I have to have access to the router, in order to forward ports?
2
votes
1answer
932 views

How to configure jetty to listen to multiple ports?

I just want to configure jetty to listen to more than one port. I don't want multiple instances nor multiple webapps, just one jetty, one webapp, but listening to 2 or more ports. The default way ...
2
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5answers
26k views

How to find DB2 port number (note: it does not use port listed in services file and db2 listing is missing from netstat command output) in windows?

I want to find DB2 port in windows, please help. Some information: DB2 v 9.7 Personal Edition - new/fresh install netstat command does not list db2 port. db2 entry missing was missing in ...
2
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2answers
2k views

socat connect-connect “proxy” two inbound TCP connections to expose a firewalled service?

I'm struggling a bit trying to see how to use socat (or a similar TCP port redirector) to expose a firewalled service on a PC. Here's the scenario: I have a server PC which will be acting as a ...