A port provides a location for an application to interface with the network. If there is no application that is listening at a particular point, data sent there will never be used.

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UDP port scanning

UDP is connectionless, so I can't expect a response packet, necessarily. If the port is closed, I might get an ICMP error message, but if the firewall could silently drop the ICMP packet How could I ...
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37 views

Opening a firewall port on virtualized Windows 7 running on Mac OS X 10.9

I am currently using a virtual machine running Windows 7 (32-bit) which is hosted by the VirtualBox application from Oracle; this latter is installed on a MacBook with the last up-to-date version of ...
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161 views

Nmap shows 554 and 7070 open on EVERY machine even when they are closed/filtered

Every single machine I scan shows port 7070 and port 554 as open regardless if the ports are closed/filtered. It will still show those two ports as open even if the target is offline (and the scan is ...
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1answer
92 views

What cable do I need for this port?

I have tried to plug a monitor to a Dell computer into the VGA slot and I have received this message: This computer has an add-in graphics card, but the monitor is plugged into the integrated video ...
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1answer
51 views

opened port on router for java socket

I am trying to make a peer to peer application and I want a port to exchange connection information and I want to ensure that this port would not be closed from the firewall on the way between peers ...
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2answers
52 views

What type of port has a logo with one long line and three short lines under?

On the side of my laptop (ThinkPad x40) there is an odd place for connecting wires, directly under one of the USB ports. The port looks similar to those for USB, with a similar rectangular shape and ...
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2answers
2k views

Can't load Fiddler because Fiddler Port in Use

Windows pop-up message as belows: Unable to bind to port [Localhost:8888]. ErrorCode: 10048. This is usually due to another service running on this port. Run NETSTAT -A at a command prompt. What ...
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2answers
4k views

Does it matter what UDP port a WOL signal is sent to?

i have seen many WOL instances use port 7 and many use port 9, does it matter? Isn't it just looking for a WOL packet at layer 2 or ethernet?
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3answers
3k views

Open port 5672/tcp for access to RabbitMQ on Mac

I have RabbitMQ in its latest version installed on my Mac with default configuration and when I'm accessing it from localhost there's no issue what so ever. But today I build a linux machine on local ...
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1answer
39 views

COM Port in use

When i am trying to install a particular software in break stating that COM PORT 3 is in use and to stop any app that is using that. In Windows 7 PC Question How can I find which application is using ...
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3answers
1k views

How to determine why port 443 is already in use?

I'm running Apache 2.4.10 on a Windows 7 machine and am trying to add SSL connections. Port 80 connections work fine, and I'm trying to add port 443. When the httpd.conf gets Listen 443 added it ...
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2answers
3k views

Why is there electricity flowing through my VGA and other ports?

I am using Windows 7 on a Sony VAIO laptop. When I connected my PC to the charger, I felt a little electric shock when I touched the VGA and other ports. I tested with a current detector and found ...
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1answer
3k views

What is the difference between Port and Connector?

I want to know the difference between Port and Connector in Computer (the physical ones),and how can i tell that this thing is a port or connector ? I know that both terms are used for the same ...
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1answer
631 views

What ports does WeChat use to transfer data?

I want to block the messenging service, wechat, on my netgear router. Does anyone know the TCP/UDP ports that wechat uses to communicate? WeChat is a Chinese messenging application developed by ...
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1answer
310 views

How i open a port (port forward) on this specific router

http://gyazo.com/86e63e79d11835ec9ab71e0b8680cc8d here is a pic of how my router looks like i cant find it in this one. I know how to open ports on my other routers. Please help Model:Home Station ...
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0answers
12 views

Multiplatform: Is it possible to perform network scan for a certain open port on a certain IP address with just one click?

When I want to scan for a certain network's open port (say 8080) in a certain IP address (say 111.222.111.222), I go to http://www.t1shopper.com/tools/port-scan/ And I fill the fields port ...
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1answer
270 views

Using Telnet: Port number

With using telnet I used port 25. Example: telnet x.x.x.x 25 I had another server today that used port 23 instead. For the future, how would one easily know which port to use? Does this port ever ...
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2answers
152 views

Torrent ports and firewalls

I use this uTorrent program, under its settings 'Listening port' I set up a port of 46301, and also open that port in firewall. But whoever connects to me to leech, they connect to random ports ...
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8answers
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Manually closing a port from commandline

I want to close an open port which is in listening mode between my client and server application. Is there any manual command line option in Linux to close a port ?? NOTE: I came to know that "only ...
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1answer
986 views

Xampp error, port 80 in use with PID 4 in virtualbox

I noticed there is a lot of information about port 80 errors with xampp, however, there is not much information about this error on virtualbox. On my main computer, xampp works perfect. On my ...
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1answer
2k views

Port forwarding with IPTABLES and VBox

I have a small problem with getting a proper configuration of iptables under Ubuntu. But before, let me describe the network configuration: I am using xDSL line terminated with modem+router+DHCP ...
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1answer
5k views

Unable to connect to the MKS: Failed to connect to server xxx.xxx.xxx.xxx:902, the port is closed

I have a server with Vsphere ESXi 5.5. when i try to start a virtual machine with the vsphere client i get this error: Unable to connect to the MKS: Failed to connect to server 172.16.63.3:902 and ...
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1answer
219 views

Reinstalled Windows 7 - Now cannot connect to any activation server or Microsoft Exchange

I reinstalled Windows 7 this morning, and now I am unable to connect to any activation servers for any Adobe software, and I cannot connect to Office 365 Microsoft Exchange server in Outlook 2013. ...
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7answers
71k views

How to “restart/repair” an USB port?

My laptop has two USB ports, but one is broken, so I use a USB hub in the other good USB port. In that USB hub, I use a mouse and keyboard. Suddenly, that USB port doesn't detect the mouse and the ...
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0answers
17 views

Windows Server 2008 IP porting

We have a Dell server running Windows Server 2008. This server has two NIC cards. One NIC is connected to a private network and the second is on a public. We need the ability to route the public IP ...
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1answer
62 views

How can I check which ports are in use from the Linux command line? [duplicate]

I'm running a Node.JS application and need to figure out if something is using a certain port. How can I do this from the linux command line?
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1answer
53 views

Port forwarding does not work

I am connecting to office network through VPN. I have two servers A and B. I have ssh/tomcat access to A through VPN but not to B. When I ssh into A, from there I can ssh into B. Also, B is running ...
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646 views

Port forwarding on a Huawei EchoLife HG8245

The problem is port forwarding in my EchoLife HG8245 router. I am able to port forward, and I know it works. But after some time I've came with the conclusion that my router only accepts 1 connection ...
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1answer
253 views

Opening a port on CentOS server not working externally?

I am trying to to setup a Ghost blog instance on port 80 of my CentOS 6 virtual server. There are no pre-installed web servers occupying port 80. If I run Ghost in production mode as a background ...
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1answer
273 views

PID not shown under Services in the Task Manager on Windows 8

I'm trying to run a program that defaults to port 9000 but there is an unknown source using that port. I found the PID by using, netstat -aon | more and went to the task managers service tab ...
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3answers
1k views

Which Powershell Function could check whether a certain port is in LISTENING state on localhost?

Introduction Aim: to check whether a port is in LISTENING state on localhost by using a PowerShell function The following command: New-Object Net.Sockets.TcpClient.Connect("127.0.0.1",10389) ...
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5answers
1k views

Cannot Delete Unwanted COM ports - Windows 7

I recently installed a Cannon wireless printer for temporary use, the drivers of which set nearly all my COM ports to be constantly in-use (an occasionnal bug noted in the ReadMe after installation ...
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1answer
159 views

After recover sshd_config on my VPS my TeamSpeak 3 client can't connect with server

I'm destroy my default sshd_config file in /etc/ssh/ on my VPS and I'm recover this to default one. After this I'm trying to connect with my TS3 server on this same VPS. OS says me TS is ON and ...
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1answer
52 views

Test connection to a port without actually connecting to it

I have a python socket server (single-threaded, accepts only one connection) running somewhere. I connect to that port and do my things. How can I detect whether port is open or closed without ...
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2answers
220 views

How to list all hosting services on Windows 7?

I cannot host on port 80, because there is an application on the background, which hosts on port 80. How do I find out which program it is?
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2answers
4k views

How to access NodeJS server on LAN?

I'm not the most knowledgeable guy ever with networking, but here goes... I've created an application with NodeJS and I'd like to test the application on my LAN with my family. The application ...
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1answer
769 views

Netcat error: Can't grab 0.0.0.0:80 with bind

When I tried to listen on port 80 in Windows 7 with netcat, I get this error: C:\Users\sashoalm>echo "hello, world" | netcat.exe -l -p 80 Can't grab 0.0.0.0:80 with bind On the other hand, ...
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0answers
25 views

Bad Results from Port Check Sites

I'm not a network expert, though I know how to set up a static IP and forward ports. I've always wondered how port checking sites like http://ping.eu/port-chk/ work, because whenever I try them on ...
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168 views

'fail to add torrent' error nexus 5

Trying to use torrent download on nexus 5 modded rom slimkat 4.4. Keep getting error ~ 'falied to add torrent from source target'. Tried using utorrent and ttorrent-lite, and have not had any success. ...
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21 views

USB port cut on

I need to use my computer to charge several items. If I leave my computer for any length of time it shuts down Of course the things charging stop the charging process and I have t cut my system back ...
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0answers
191 views

Port forwarding on Parallel Desktop

My situation is like this. I have a Windows 7 VM run by Parallel Desktop, on which I run ASP.NET on localhost:1240 (Visual Studio development server). Is it possible from my host machine (OSX 10.9) to ...
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1answer
614 views

Why can I not connect to a reverse SSH tunnel port remotely, even with GatewayPorts enabled?

I require constant SSH access to a host in our department, whose IP address is dynamically allocated. I've set up a remote SSH tunnel from the target host to one of our hosts that does posess a static ...
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2answers
1k views

I have 2 computers with Linux, how can I send with ftp files from computer1 to computer2 (shell command)?

I have 2 computers with Linux. How can I send with ftp files from computer1 to computer2 them (shell command)? Steps that I think should be done (miss shell commands): Find inner IP address of ...
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2answers
135 views

Port Forwarding a Specific Port (e.g. 22)

I'm still confused about establishing an SSH connection (port 22) between two computers on different internal networks. For example: I am on my computer with internal IP address IIP-1, connected to ...
1
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0answers
462 views

Installing and running two postgresql versions on different ports (or two instances of same server)

I have postgresql 9.1 installed on my machine (Ubuntu). I need another postgresql server that would run next to the old one. Exact version does not matter, but I'm thinking of using 9.2 version. How ...
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0answers
218 views

UDP port binding to loopback interface

I've been trying to play a video game in multiplayer, but after trying a lot of time, I begun to realize there was some problem with my loopback interface (Windows 7) I have UPnP activated in my ...
0
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1answer
150 views

Ubuntu + SSL ports + AVAST

I have an interesting problem with communication via standard SSL ports. Fresh installed Ubuntu 14.04 server + Postfix + Dovecot, SASL authentication provided by Dovecot, self-signed certificate ...
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1answer
919 views

How to forward blocked ports by ISP

So I've been trying to setup a TeamSpeak 3 server on my pc but ports (9987,10011,30033) are blocked by my ISP, I've contacted them to unblock them but they didn't accept, and it's the fastest ISP in ...
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0answers
174 views

Can't connect to a game over remote LAN

First of all I want to say that I'm not entirely sure if this question can be asked here. If it can't, then please tell me and I will delete it. There's this game called Killing Floor, which can be ...
1
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1answer
271 views

Where to place a port-mirroring switch for home network monitoring

I want to start monitoring traffic that goes in and out of my home network. I'd like to collect information like bandwidth usage and (specifically) HTTP requests from home computers to websites. From ...